A high-efficiency low-temperature rectifying column for electronic-grade propylene purification
Patent Information
- Application Number
- CN202522652099.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-15
AI Technical Summary
Traditional high-efficiency cryogenic distillation columns lack advanced control systems, resulting in the inability to monitor and automatically adjust in real time, which affects the stability and efficiency of the distillation process and makes it difficult to meet the requirements of electronic-grade propylene for high purity and high stability.
The system employs a PLC controller combined with temperature, pressure, and level sensors for real-time monitoring, automatically adjusting the power of the heater and condenser. It also enhances gas-liquid contact through trays and Pall rings, and reduces heat loss through a high-efficiency insulation layer, thus achieving efficient propylene purification.
It achieves efficient and stable electronic-grade propylene purification, meets high purity requirements, reduces energy consumption, improves equipment operational reliability, and ensures the stability and efficiency of the distillation process.
Smart Images
Figure CN224925623U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of propylene purification technology, and in particular to a high-efficiency cryogenic distillation column for the purification of electronic-grade propylene. Background Technology
[0002] Propylene is a colorless, odorless, slightly sweet-smelling, and extremely flammable gas that burns with a bright flame. It has a low explosion limit and low solubility in water, but is soluble in organic solvents such as ethanol and ether. Propylene is an important chemical raw material, mainly used in the production of polypropylene. It can also be used to synthesize acrylonitrile, propylene oxide, isopropanol, phenol, acetone, and other chemicals. It is widely used in plastics, pharmaceuticals, agriculture, and other fields. The main production methods for propylene include petroleum cracking and natural gas cracking, despite its wide range of industrial applications.
[0003] In modern chemical production, propylene is an important chemical raw material widely used in plastics, rubber, fiber, pharmaceuticals, electronics, and other fields. Especially in the electronics industry, the purity requirements for electronic-grade propylene are extremely high. In the purification process of electronic-grade propylene, distillation columns are usually used for separation. However, in practical applications, traditional high-efficiency cryogenic distillation columns have revealed some problems, such as the lack of advanced control systems, which makes it impossible to monitor and automatically adjust the operating status inside the column in real time. This not only affects the stability of the distillation process but also reduces the distillation efficiency, making it difficult to meet the stringent requirements of high purity and high stability for electronic-grade propylene. Therefore, we propose a high-efficiency cryogenic distillation column for the purification of electronic-grade propylene to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a high-efficiency cryogenic distillation column for the purification of electronic-grade propylene, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A high-efficiency cryogenic distillation column for purifying electronic-grade propylene includes a column body and a PLC controller. A positioning ring is fixedly connected to the outer surface of the column body, and three support columns are fixedly connected to the bottom surface of the positioning ring. A condenser is fixedly installed on the upper surface of the column body. A feed pipe and a collection pipe are fixedly connected to the outer surface of the column body. A slag discharge pipe is fixedly connected to the bottom surface of the column body. A heater is fixedly installed on the bottom surface of the column body. Flow control valves are fixedly connected to the outer surfaces of both the collection pipe and the slag discharge pipe. Multiple trays are fixedly connected to the inner wall of the column body. Multiple Pall rings arranged in a ring are snapped onto the upper surface of each tray. Multiple downcomers are fixedly connected to the upper surface of each tray. A demister is fixedly installed on the inner wall of the column body.
[0007] In a further embodiment, a reinforcing ring is fixedly connected to the upper surface of the positioning ring, and the inner ring of the reinforcing ring is fixedly connected to the outer surface of the tower body.
[0008] In a further embodiment, a snap-fit ring is fixedly connected to the bottom surface of the positioning ring, the inner sidewall of the snap-fit ring is fixedly connected to the outer surface of the tower body, and the outer surface of each support column is fixedly connected to the outer surface of the snap-fit ring.
[0009] In a further embodiment, each of the support columns is fixedly connected to a mounting plate at its bottom end, and each mounting plate is provided with a mounting hole at its top end.
[0010] In a further embodiment, a high-efficiency insulation layer is fixedly connected to the outer surface of the tower body, and the high-efficiency insulation layer is made of polyurethane foam or glass fiber.
[0011] In a further embodiment, the PLC controller is electrically connected to a control module via wires, the PLC controller is electrically connected to a data acquisition module via wires, the data acquisition module is electrically connected to a real-time monitoring module via wires, and the real-time monitoring module is electrically connected to a level sensor, a pressure sensor, a temperature sensor, and a flow sensor via wires.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This device significantly enhances gas-liquid contact and improves heat and mass transfer efficiency through the combination of trays and Pall rings, achieving highly efficient propylene purification to electronic-grade purity standards. The high-efficiency insulation layer effectively reduces heat loss, ensuring low-temperature operation and lowering energy consumption. Temperature, pressure, and level sensors, along with a PLC controller, monitor and automatically adjust the power of the heater and condenser in real time, optimizing operating conditions and ensuring the stability and efficiency of the distillation process. High-purity propylene collected from the top of the column is discharged through a collection pipe, with the flow rate precisely controlled by a flow control valve. Impurities at the bottom of the column are discharged through a slag discharge pipe, achieving effective separation and treatment of impurities. A demister at the top of the column removes droplets, preventing liquid entrainment from affecting purity. A downcomer ensures the liquid descends gradually, further improving the distillation effect. This results in highly efficient and stable electronic-grade propylene purification, reducing energy consumption and improving equipment reliability, meeting the stringent requirements of the electronics industry for high-purity propylene. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of a high-efficiency cryogenic distillation column used for the purification of electronic-grade propylene.
[0015] Figure 2 This is a side cross-sectional schematic diagram of the column body in a high-efficiency cryogenic distillation column used for the purification of electronic-grade propylene.
[0016] Figure 3 This is a schematic diagram of the overhead cross-section of a high-efficiency cryogenic distillation column used for the purification of electronic-grade propylene.
[0017] Figure 4 This is a system diagram of a high-efficiency cryogenic distillation column used for the purification of electronic-grade propylene.
[0018] In the diagram: 1. Tower body; 2. Positioning ring; 3. Reinforcing ring; 4. Support column; 5. Snap-fit ring; 6. Mounting plate; 7. Condenser; 8. High-efficiency insulation layer; 9. Feed pipe; 10. Discharge pipe; 11. Heater; 12. Slag discharge pipe; 13. Flow control valve; 14. Tower plate; 15. Pall ring; 16. Downcomer; 17. Demister; 18. PLC controller; 19. Control module; 20. Data acquisition module; 21. Real-time monitoring module; 22. Liquid level sensor; 23. Pressure sensor; 24. Temperature sensor; 25. Flow sensor. Detailed Implementation
[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-4 In this utility model, a high-efficiency low-temperature distillation column for purifying electronic-grade propylene includes a column body 1 and a PLC controller 18. A positioning ring 2 is fixedly connected to the outer surface of the column body 1, and three support columns 4 are fixedly connected to the bottom surface of the positioning ring 2. A condenser 7 is fixedly installed on the upper surface of the column body 1. A feed pipe 9 is fixedly connected to the outer surface of the column body 1, and a collection pipe 10 is fixedly connected to the outer surface of the column body 1. A slag discharge pipe 12 is fixedly connected to the bottom surface of the column body 1, and a heater 11 is fixedly installed on the bottom surface of the column body 1. Flow control valves 13 are fixedly connected to the outer surfaces of the collection pipe 10 and the slag discharge pipe 12. Multiple trays 14 are fixedly connected to the inner wall of the column body 1. Multiple Pall rings 15 arranged in a ring are snapped onto the upper surface of each tray 14. Multiple downcomers 16 are fixedly connected to the upper surface of each tray 14. A demister 17 is fixedly installed on the inner wall of the column body 1.
[0023] A reinforcing ring 3 is fixedly connected to the upper surface of the positioning ring 2. The inner ring of the reinforcing ring 3 is fixedly connected to the outer surface of the tower body 1. The reinforcing ring 3 can reinforce the tower body 1. A snap-fit ring 5 is fixedly connected to the bottom surface of the positioning ring 2. The inner side wall of the snap-fit ring 5 is fixedly connected to the outer surface of the tower body 1. The outer surface of each support column 4 is fixedly connected to the outer surface of the snap-fit ring 5. The snap-fit ring 5 facilitates the reinforcement of the support column 4. A mounting plate 6 is fixedly connected to the bottom end of each support column 4. A mounting hole is opened at the top of each mounting plate 6. The mounting plate 6 and the mounting hole cooperate to facilitate the fixing and installation of the tower body 1.
[0024] A high-efficiency insulation layer 8 is fixedly connected to the outer surface of the tower body 1. The high-efficiency insulation layer 8 is made of polyurethane foam or glass fiber. The high-efficiency insulation layer 8 effectively reduces heat loss, ensures low-temperature operation, and reduces energy consumption. The PLC controller 18 is electrically connected to the control module 19 via wires. The PLC controller 18 is electrically connected to the data acquisition module 20 via wires. The data acquisition module 20 is electrically connected to the real-time monitoring module 21 via wires. The real-time monitoring module 21 is electrically connected to the liquid level sensor 22, pressure sensor 23, temperature sensor 24, and flow sensor 25 via wires. Through the temperature sensor 24, pressure sensor 23, and liquid level sensor 22, the PLC controller 18 monitors in real time and automatically adjusts the power of the heater 11 and condenser 7 to optimize operating conditions and ensure the stability and efficiency of the distillation process. The high-purity propylene collected from the top of the tower is discharged through the collection pipe 10, and the flow rate is precisely controlled by the flow control valve 13. The impurities at the bottom of the tower are discharged through the slag discharge pipe 12, realizing the effective separation and treatment of impurities.
[0025] The working principle of this utility model is as follows:
[0026] In operation, propylene is introduced into the tower body 1 through the feed pipe 9 and pre-cooled by the condenser 7. The tower body 1 contains multiple rectification sections, each consisting of a tray 14 and Pall rings 15, designed to enhance gas-liquid contact and improve heat and mass transfer efficiency. A heater 11 at the bottom of the tower body 1 provides heat, causing the liquid at the bottom to vaporize and form rising steam, which then flows counter-currently with the descending liquid for separation. High-purity propylene collected from the top of the tower is discharged through the collection pipe 10, with the flow rate controlled by the flow control valve 13. Impurities at the bottom of the tower are discharged through the slag discharge pipe 12. A high-efficiency insulation layer 8 on the outside of the tower body 1 reduces heat loss and ensures low-temperature operation. The tower is equipped with a temperature sensor 24, a pressure sensor 23, and a level sensor 22. A PLC controller 18 monitors these sensors in real time and automatically adjusts the power of the heater 11 and the condenser 7 to optimize operating conditions. A demister 17 at the top of the tower removes droplets, and a downcomer 16 ensures the liquid descends in stages. This structure achieves efficient and stable electronic-grade propylene purification, reducing energy consumption and improving equipment reliability.
[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A high-efficiency cryogenic distillation column for the purification of electronic-grade propylene, characterized in that: The tower includes a tower body (1) and a PLC controller (18). A positioning ring (2) is fixedly connected to the outer surface of the tower body (1). Three support columns (4) are fixedly connected to the bottom surface of the positioning ring (2). A condenser (7) is fixedly installed on the upper surface of the tower body (1). A feed pipe (9) is fixedly connected to the outer surface of the tower body (1). A collection pipe (10) is fixedly connected to the outer surface of the tower body (1). A slag discharge pipe (12) is fixedly connected to the bottom surface of the tower body (1). A heater (11) is fixedly installed on the bottom surface. A flow control valve (13) is fixedly connected to the outer surface of the extraction pipe (10) and the outer surface of the slag discharge pipe (12). Multiple trays (14) are fixedly connected to the inner wall of the tower body (1). Multiple Pall rings (15) are snapped onto the upper surface of each tray (14). Multiple downcomers (16) are fixedly connected to the upper surface of each tray (14). A demister (17) is fixedly installed on the inner wall of the tower body (1).
2. The high-efficiency cryogenic distillation column for purifying electronic-grade propylene according to claim 1, characterized in that: A reinforcing ring (3) is fixedly connected to the upper surface of the positioning ring (2), and the inner ring of the reinforcing ring (3) is fixedly connected to the outer surface of the tower body (1).
3. The high-efficiency cryogenic distillation column for purifying electronic-grade propylene according to claim 1, characterized in that: The bottom surface of the positioning ring (2) is fixedly connected to a snap ring (5), the inner side wall of the snap ring (5) is fixedly connected to the outer surface of the tower body (1), and the outer surface of each support column (4) is fixedly connected to the outer surface of the snap ring (5).
4. The high-efficiency cryogenic distillation column for purifying electronic-grade propylene according to claim 1, characterized in that: Each of the support columns (4) is fixedly connected to a mounting plate (6) at its bottom end, and each of the mounting plates (6) has a mounting hole at its top end.
5. The high-efficiency cryogenic distillation column for purifying electronic-grade propylene according to claim 1, characterized in that: The outer surface of the tower body (1) is fixedly connected with a high-efficiency insulation layer (8), and the high-efficiency insulation layer (8) is made of polyurethane foam or glass fiber.
6. The high-efficiency cryogenic distillation column for purifying electronic-grade propylene according to claim 1, characterized in that: The PLC controller (18) is electrically connected to the control module (19) via wires. The PLC controller (18) is electrically connected to the data acquisition module (20) via wires. The data acquisition module (20) is electrically connected to the real-time monitoring module (21) via wires. The real-time monitoring module (21) is electrically connected to the liquid level sensor (22), pressure sensor (23), temperature sensor (24), and flow sensor (25) via wires.