Rectification separation device for acylation reagent material recovery

Abstract

The utility model relates to a rectification separation device for acylation reagent material recovery, which comprises a rectification tower 1, a plurality of vertically distributed monitoring holes 11 are formed on a tower section of the rectification tower 1, and a plurality of monitoring connection seats 2 opposite to the monitoring holes 11 are fixedly connected on the outer wall of the tower section of the rectification tower 1; the rectifying tower 1 is provided with a plurality of temperature and pressure integrated sensors 3, the temperature and pressure integrated sensors 3 are respectively screwed in the monitoring connection seats 2, part of the monitoring connection seats 2 are not screwed with the temperature and pressure integrated sensors 3, and the monitoring connection seats 2 without the temperature and pressure integrated sensors 3 are self-sealed. A valve hole 241 of a valve core 24 in the self-sealing monitoring connection seat 2 faces the inner wall of the communication hole; and the valve core 24 is matched with the positioning sleeve 23 to realize sealing. The temperature and pressure integrated sensor 3 can be installed on the monitoring connection seat 2 in a threaded connection mode or can be disassembled conveniently, after the temperature and pressure integrated sensor 3 is installed, the temperature and pressure integrated sensor 3 presses the front sliding sleeve 22 to move so as to drive the valve element 24 to rotate to open the valve hole 241, and a probe of the temperature and pressure integrated sensor 3 can directly face the interior of the rectifying tower 1. And after the temperature and pressure integrated sensor 3 is detached, the front sliding sleeve 22 moves forwards and resets, so that rotary reset sealing of the valve element 24 is achieved, reactants of the rectifying tower 1 cannot flow out of the monitoring connection seat 2, and self-sealing is achieved.

Description

Technical fields:

[0001] This utility model relates to the technical field of distillation and separation devices, and more specifically to a distillation and separation device for recovering acylation reagent materials. Background technology:

[0002] α-Acetyl-γ-butyrolactone (ABL) is an important pharmaceutical intermediate and organic chemical raw material. It is a crucial intermediate in the preparation of vitamins and chlorophyll, and also a pharmaceutical intermediate in the synthesis of antipsychotic drugs such as risperidone, anticonvulsant and sedative-hypnotic drugs such as chloromethlothiazole, nifedipine, and chloroquine. ABL products can be synthesized by acetylation of γ-butyrolactone as a raw material and methyl acetate as an acylation reagent under the action of a catalyst. In this process, an excess of methyl acetate acylation reagent is added, necessitating its separation and recovery. Methyl acetate acylation can be recovered through multi-stage distillation in a distillation column. However, multi-stage distillation requires effective and stable control of distillation temperature and pressure to effectively recover the excess methyl acetate raw material from the reaction solution. Therefore, multiple connectors for integrated temperature and pressure sensors are installed on the distillation column for precise monitoring. When producing other products, such a large number of integrated temperature and pressure sensors are not needed; they can be disassembled and stored to prevent damage from long-term installation on the distillation column. However, existing connectors are mostly conventional pipe joints, and disassembling the integrated temperature and pressure sensors requires sealing with plugs, which is cumbersome. Therefore, a self-sealing integrated temperature and pressure sensor can be designed, allowing for disassembly during distillation column operation. Utility Model Content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a distillation and separation device for recovering acylation reagent materials. The distillation and separation device is designed with a self-sealing connector for the installation and connection of an integrated temperature and pressure sensor. The integrated temperature and pressure sensor is easy to install and disassemble, and the installation and disassembly do not affect the distillation process during operation.

[0004] A distillation separation device for recovering acylation reagent materials includes a distillation column, with several vertically distributed monitoring holes formed on the column sections, and several monitoring connection seats fixed to the outer wall of the column sections opposite to the monitoring holes; the distillation column is equipped with several integrated temperature and pressure sensors, which are screwed into the monitoring connection seats respectively.

[0005] The monitoring connector includes a connector with a connecting hole formed on it, which is aligned with the monitoring hole. A threaded hole is formed at the front end of the connecting hole, corresponding to the integrated temperature and pressure sensor. Guide grooves are formed on the inner walls of both sides of the connecting hole behind the threaded hole. A circular front sliding sleeve and a positioning sleeve are respectively inserted into the connecting hole of the connector. Guide blocks are formed on both sides of the outer wall of the front sliding sleeve, and these guide blocks are respectively inserted into the guide grooves of the connector. Rearwardly extending connecting blocks are formed on both outer walls of the positioning sleeve, and these connecting blocks are respectively inserted and fixed into the guide grooves of the connector.

[0006] A spherical valve core is inserted into the connecting hole of the rear side of the positioning sleeve. The valve core has a valve hole formed on it, which is opposite to the monitoring hole. The front end of the valve core is inserted into the positioning sleeve and abuts against the inner wall of the positioning sleeve. Support shafts are formed on the outer walls on both sides of the valve core. The central axis of the support shaft is perpendicular to the central axis of the valve hole. The ends of the support shafts are respectively inserted into the connecting blocks. A gear is fixedly connected to the support shaft between the connecting block and the valve core. A rack meshes on the gear. The front end of the rack passes through the positioning sleeve and is fixedly connected to the rear end face of the front sliding sleeve. A rearwardly extending connecting sleeve is formed on the inner ring of the rear end face of the front sliding sleeve. A compression spring is fitted on the connecting sleeve. The two ends of the compression spring abut against the front sliding sleeve and the positioning sleeve, respectively.

[0007] Preferably, a nylon washer is attached and fixed to the front end face of the front sliding sleeve, and pads are provided on both sides of the nylon washer, with the pads abutting against the front end face of the guide block.

[0008] Preferably, the monitoring connection seat on the upper part of the distillation column is not equipped with an integrated temperature and pressure sensor. The nylon gasket in the monitoring connection seat without an integrated temperature and pressure sensor abuts against the front bottom surface of the guide groove, and the valve hole on the valve core faces the inner wall of the connecting hole.

[0009] Preferably, the inner ring of the rear end face of the positioning sleeve is formed with a spherical sealing connection surface, and a spherical sealing element is fixed on the valve core, with the sealing element pressing against the sealing connection surface of the positioning sleeve.

[0010] The diameter of the valve hole on the valve core is smaller than the inner diameter of the positioning sleeve.

[0011] Preferably, the positioning sleeve is formed with a clearance hole opposite to the rack, the rack is inserted into the clearance hole of the positioning sleeve, and the opposite side walls of the rack abut against the side walls of the clearance hole.

[0012] Preferably, the sidewalls of the rack and the guide groove on the connector are parallel.

[0013] Preferably, the diameter of the outer wall of the front sliding sleeve is equal to the diameter of the outer wall of the positioning sleeve, and the diameter of the outer wall of the positioning sleeve is equal to the diameter of the connecting hole on the connector.

[0014] The beneficial effects of this utility model are as follows:

[0015] This distillation and separation unit is designed with a self-sealing connector for the installation and connection of the integrated temperature and pressure sensor. The integrated temperature and pressure sensor is easy to install and disassemble, and the installation and disassembly do not affect the distillation process during operation. Attached image description:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Enlarged view of a portion of point A in the diagram.

[0018] In the diagram: 1. Distillation column; 11. Monitoring hole; 2. Monitoring connector; 21. Connector; 211. Threaded hole; 212. Guide groove; 22. Front sliding sleeve; 221. Guide block; 222. Connecting sleeve; 23. Positioning sleeve; 231. Connecting block; 232. Clearance hole; 24. Valve core; 241. Valve hole; 242. Support shaft; 25. Seal; 26. Gear; 27. Rack; 28. Compression spring; 29. ​​Nylon washer; 3. Integrated temperature and pressure sensor. Detailed implementation method:

[0019] Example: See Figure 1 , 2 As shown, a distillation separation device for recovering acylation reagent materials includes a distillation column 1. Several vertically distributed monitoring holes 11 are formed on the column sections of the distillation column 1. Several monitoring connection seats 2, opposite to the monitoring holes 11, are fixed to the outer wall of the column sections of the distillation column 1. Several integrated temperature and pressure sensors 3 are installed on the distillation column 1, and each temperature and pressure sensor 3 is screwed into the monitoring connection seat 2. Some monitoring connection seats 2 do not have integrated temperature and pressure sensors 3 screwed into them. The monitoring connection seats 2 without installed temperature and pressure sensors 3 achieve self-sealing. The valve core 24 valve hole 241 inside the self-sealing monitoring connection seat 2 faces the inner wall of the connecting hole. The valve core 24, in conjunction with the positioning sleeve 23, achieves a seal.

[0020] The monitoring connector 2 includes a connector 21, on which a connecting hole is formed, corresponding to the monitoring hole 11. A threaded hole 211 is formed at the front end of the connecting hole, corresponding to the integrated temperature and pressure sensor 3. Guide grooves 212 are formed on the inner walls of both sides of the connecting hole behind the threaded hole 211. A circular front sliding sleeve 22 and a positioning sleeve 23 are respectively inserted into the connecting hole of the connector 21. Guide blocks 221 are formed on both sides of the outer wall of the front sliding sleeve 22, and are respectively inserted into the guide grooves 212 of the connector 21. Rearwardly extending connecting blocks 231 are formed on both sides of the outer wall of the positioning sleeve 23, and are respectively inserted and fixed into the guide grooves 212 of the connector 21.

[0021] A spherical valve core 24 is inserted into the connecting hole of the seat 21 on the rear side of the positioning sleeve 23. The valve core 24 has a valve hole 241 formed on it, which is opposite to the monitoring hole 11. The front end of the valve core 24 is inserted into the positioning sleeve 23 and abuts against the inner wall of the positioning sleeve 23. Support shafts 242 are formed on the outer walls on both sides of the valve core 24. The central axis of the support shaft 242 is perpendicular to the central axis of the valve hole 241. The ends of the support shaft 242 are respectively inserted into the connecting block 231. A gear 26 is inserted and fixedly connected to the support shaft 242 between the connecting block 231 and the valve core 24. A rack 27 meshes with the gear 26. The front end of the rack 27 passes through the positioning sleeve 23 and is fixedly connected to the rear end face of the front sliding sleeve 22. A rearwardly extending connecting sleeve 222 is formed on the inner ring of the rear end face of the front sliding sleeve 22. A compression spring 28 is sleeved on the connecting sleeve 222. The two ends of the compression spring 28 abut against the front sliding sleeve 22 and the positioning sleeve 23, respectively.

[0022] A nylon washer 29 is attached and fixed to the front end face of the front sliding sleeve 22. Pads are provided on both sides of the nylon washer 29, and these pads abut against the front end face of the guide block 221. The nylon washer 29 in the monitoring connector 2 (without the integrated temperature and pressure sensor 3 installed) abuts against the front bottom surface of the guide groove 212. The force of the compression spring 28 restricts the rotation of the valve core 24, thereby achieving effective sealing in conjunction with the positioning sleeve 23. Figure 2 As shown;

[0023] Regarding the monitoring connector 2 with the integrated temperature and pressure sensor 3 screwed in, the integrated temperature and pressure sensor 3 is screwed into the threaded hole 211 of the connector 21. During the screwing process, the integrated temperature and pressure sensor 3 will abut against the front end face of the front sliding sleeve 22. Its probe is inserted into the inner hole of the front sliding sleeve 22 and is protected by the front sliding sleeve 22. As the integrated temperature and pressure sensor 3 is tightened, it will drive the front sliding sleeve 22 to move backward. The backward movement of the front sliding sleeve 22 will drive the rack 27 to move, thereby driving the valve core 24 to rotate, so that the valve hole 241 on the valve core 24 is connected to the positioning sleeve 23. Thus, the probe of the integrated temperature and pressure sensor 3 can accurately detect the temperature and pressure of the distillation column 1 through the inner hole of the front sliding sleeve 22, the inner hole of the positioning sleeve 23 and the valve hole 241 (without obstruction or interference).

[0024] The inner ring of the rear end face of the positioning sleeve 23 is formed with a spherical sealing connection surface. A spherical sealing element 25 is inserted and fixed on the valve core 24. The sealing element 25 is pressed against the sealing connection surface of the positioning sleeve 23. The sealing element 25 can improve the effect.

[0025] The diameter of the valve hole 241 on the valve core 24 is smaller than the inner diameter of the positioning sleeve 23.

[0026] The positioning sleeve 23 has a clearance hole 232 formed on it, which is opposite to the rack 27. The rack 27 is inserted into the clearance hole 232 of the positioning sleeve 23, and the opposite side walls of the rack 27 abut against the side walls of the clearance hole 232. The connection between the rack 27 and the positioning sleeve 23 is used to restrict the rotation of the front sliding sleeve 2. Figure 2 In order to clearly avoid the hole position of the through hole 232, a rack 27 is set. In the actual structure, two racks 27 can be set. The rack 27 is more effective, but it is required that all racks 27 are set on the same side of the gear 26.

[0027] The sidewalls of the guide groove 212 on the rack 27 and the connector 21 are parallel.

[0028] The diameter of the outer wall of the front sliding sleeve 22 is equal to the diameter of the outer wall of the positioning sleeve 23, and the diameter of the outer wall of the positioning sleeve 23 is equal to the diameter of the connecting hole on the connector 21.

[0029] Working principle: This structure is a distillation separation device for recovering acylation reagent materials. Its technical features are reflected in the monitoring connection seat 2. The integrated temperature and pressure sensor 3 can be installed on the monitoring connection seat 2 by screwing or can be removed. The installation and removal are convenient. After the integrated temperature and pressure sensor 3 is installed, the integrated temperature and pressure sensor 3 presses the front sliding sleeve 22 to move, which drives the valve core 24 to rotate and open the valve hole 241. This allows the probe of the integrated temperature and pressure sensor 3 to face the inside of the distillation column 1, without interference from the components inside the monitoring connection seat 2, resulting in good monitoring effect.

[0030] When the temperature and pressure sensor 3 is disassembled, the front sliding sleeve 22 moves forward to reset, thereby achieving the rotation reset and sealing of the valve core 24. The reactants of the distillation column 1 will not flow out from the monitoring connection seat 2, thus achieving self-sealing.

[0031] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. Rectification separation device for the recovery of acylating agent material, comprising a rectification column (1), on the column sections of which a number of vertically distributed monitoring holes (11) are formed, characterised in that: Several monitoring connection seats (2) opposite to the monitoring holes (11) are fixedly connected to the outer wall of the distillation column (1); several temperature and pressure integrated sensors (3) are provided on the distillation column (1), and the temperature and pressure integrated sensors (3) are screwed into the monitoring connection seats (2); The monitoring connector (2) includes a connector (21), on which a connecting hole is formed that is directly opposite to the monitoring hole (11). A threaded hole (211) is formed at the front end of the connecting hole that is opposite to the integrated temperature and pressure sensor (3). Guide grooves (212) are formed on the inner walls of the connecting hole on both sides of the threaded hole (211). A circular front sliding sleeve (22) and a positioning sleeve (23) are respectively inserted into the connecting hole of the connector (21). Guide blocks (221) are formed on both sides of the outer wall of the front sliding sleeve (22). The guide blocks (221) are respectively inserted into the guide grooves (212) of the connector (21). Connecting blocks (231) extending backward are formed on both sides of the outer wall of the positioning sleeve (23). The connecting blocks (231) are respectively inserted into and fixed in the guide grooves (212) of the connector (21). A spherical valve core (24) is inserted into the connecting hole of the connector (21) on the rear side of the positioning sleeve (23). A valve hole (241) is formed on the valve core (24) opposite to the monitoring hole (11). The front end of the valve core (24) is inserted into the positioning sleeve (23) and abuts against the inner wall of the positioning sleeve (23). Support shafts (242) are formed on the outer walls on both sides of the valve core (24). The central axis of the support shaft (242) is perpendicular to the central axis of the valve hole (241). The ends of the support shafts (242) are respectively inserted into the connecting block (231). Inside; a gear (26) is inserted and fixed on the support shaft (242) between the connecting block (231) and the valve core (24). A rack (27) meshes on the gear (26). The front end of the rack (27) passes through the positioning sleeve (23) and is fixed on the rear end face of the front sliding sleeve (22). The inner ring of the rear end face of the front sliding sleeve (22) is formed with a rearwardly extending connecting sleeve (222). A compression spring (28) is sleeved on the connecting sleeve (222). The two ends of the compression spring (28) abut against the front sliding sleeve (22) and the positioning sleeve (23) respectively.

2. The rectifying separation apparatus for recovering an acylating agent material according to claim 1, characterized by: A nylon washer (29) is attached and fixed to the front end face of the front sliding sleeve (22). The nylon washer (29) has pads on both sides, and the pads abut against the front end face of the guide block (221).

3. The rectifying separation apparatus for recovering an acylating agent material according to claim 2, characterized by: The monitoring connection seat (2) of the upper part of the distillation column (1) is not equipped with a temperature and pressure integrated sensor (3). The nylon gasket (29) in the monitoring connection seat (2) without the temperature and pressure integrated sensor (3) abuts against the front bottom surface of the guide groove (212), and the valve hole (241) on the valve core (24) faces the inner wall of the connecting hole.

4. The rectifying separation apparatus for recovering an acylating agent material according to claim 1, characterized by: The inner ring of the rear end face of the positioning sleeve (23) is formed with a spherical sealing connection surface, and a spherical sealing element (25) is inserted and fixed on the valve core (24), and the sealing element (25) presses against the sealing connection surface of the positioning sleeve (23). The diameter of the valve hole (241) on the valve core (24) is smaller than the inner diameter of the positioning sleeve (23).

5. The rectifying separation apparatus for acylating agent material recovery according to claim 1, characterized by: The positioning sleeve (23) is formed with a clearance hole (232) opposite to the rack (27). The rack (27) is inserted into the clearance hole (232) of the positioning sleeve (23), and the two side walls of the rack (27) respectively abut against the side walls of the clearance hole (232).

6. The rectifying separation apparatus for acylating agent material recovery according to claim 1, characterized by: The sidewalls of the guide groove (212) on the rack (27) and the connector (21) are parallel.

7. The rectifying separation apparatus for acylating agent material recovery according to claim 1, characterized by: The diameter of the outer wall of the front sliding sleeve (22) is equal to the diameter of the outer wall of the positioning sleeve (23), and the diameter of the outer wall of the positioning sleeve (23) is equal to the diameter of the connecting hole on the connector (21).

Images