A rectifying kettle for processing thionyl chloride

Abstract

The utility model discloses a kind of rectifying stills for processing thionyl chloride, the utility model relates to chemical processing technical field.It includes rectifying still main part, and installation mechanism for thionyl chloride processing is arranged on the rectifying still main part, installation mechanism includes: stirring subassembly, including the first drive rod of rectifying still main part inside rotary connection, the outer wall of the first drive rod is uniformly fixed with stirring rod, the utility model first motor starts, drives the rotation of first drive rod, drives stirring rod to stir material, while scraper support scrapes off adherend of inner wall, avoid local overheating or coking of material, when first drive rod rotates, second bevel gear drives the rotation of first bevel gear, and then through third bevel gear drives movable rod reverse rotation, movable rod and first drive rod reverse rotation, make two groups of stirring parts form convection, realize vertical bidirectional stirring, make material mixing more intense and uniform, greatly strengthen mass transfer and heat transfer process, enhance mixing effect.

Description

Technical Field

[0001] This utility model relates to the field of chemical processing technology, specifically to a distillation kettle for processing thionyl chloride. Background Technology

[0002] Thionyl chloride, as an important chlorinating and dehydrating agent in the field of organic synthesis, is widely used in pharmaceuticals, pesticides, dyes and other industries. Its product purity directly determines the stability of downstream processes and product quality. Therefore, distillation purification is the core link in the production process of thionyl chloride. As a key piece of equipment in this link, the structural design of the distillation kettle has a decisive impact on purification efficiency, product purity and production economy.

[0003] Thionyl chloride is an important inorganic chemical raw material widely used in pharmaceuticals, pesticides, dyes, and organic synthesis. Its distillation purification process requires high-temperature distillation to achieve gas-liquid separation. Existing distillation kettles mostly adopt a single-shaft stirring structure, with a single stirring direction, resulting in insufficient material convection and low heat transfer efficiency. Especially when processing high-viscosity or easily coking materials, single-shaft stirring can easily create local dead zones. Furthermore, during the condensation of thionyl chloride vapor, the gas phase often contains trace amounts of liquid droplets or solid particles. Traditional condensers use fixed wire mesh demisters, which are prone to clogging the mesh after droplet aggregation, leading to a decrease in gas-liquid separation efficiency and a reduction in the purity of the outlet gas. Therefore, this utility model provides a distillation kettle for thionyl chloride processing. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a distillation kettle for thionyl chloride processing. It solves the problems of existing distillation kettles, which mostly adopt a single-shaft stirring structure with a single stirring direction, resulting in insufficient material convection and low heat transfer efficiency. Especially when processing high-viscosity or easily coking materials, single-shaft stirring is prone to creating local dead zones. Furthermore, during the condensation of thionyl chloride vapor, the gas phase often contains trace amounts of liquid droplets or solid particles. Traditional condensers use fixed wire mesh demisters, which are prone to clogging the mesh after droplet aggregation, leading to a decrease in gas-liquid separation efficiency and a reduction in the purity of the outlet gas.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a distillation vessel for processing thionyl chloride, comprising a main body, wherein the main body is provided with an installation mechanism for processing thionyl chloride, the installation mechanism comprising: The stirring assembly includes a first drive rod rotatably connected inside the main body of the distillation vessel, stirring rods are uniformly fixed on the outer wall of the first drive rod, and a scraper bracket with an L-shaped structure is fixed on the outer wall of the first drive rod. A supporting shell is fixed on the inner wall of the main body of the distillation vessel, and a movable rod connected by a gear assembly is provided inside the supporting shell. The recovery assembly includes a condenser body fixed at the upper edge of the distillation vessel body, a fixed bracket fixed inside the condenser body, springs fixed at the four ends of the fixed bracket, a mesh frame body fixed at the end of the springs, and a cam connected to the outer wall of the mesh frame body via a drive assembly.

[0006] Preferably, a first motor is fixed to the top of the distillation vessel body, the output end of the first motor extends into the interior of the distillation vessel body and is fixedly connected to the first drive rod, and one side of the scraper bracket is fitted and connected to the inner wall of the distillation vessel body.

[0007] Preferably, the gear assembly includes a first bevel gear rotatably connected to one end of the supporting housing, a second bevel gear fixed to one end of the first drive rod extending to the supporting housing, the second bevel gear meshing with the first bevel gear, a movable rod penetrating the lower end of the supporting housing, and a third bevel gear fixed to one end of the movable rod extending into the supporting housing, the third bevel gear meshing with the lower part of the first bevel gear.

[0008] Preferably, an exhaust pipe is provided at the upper end of the condenser body, an inlet pipe is fixed on one side wall of the condenser body, the other end of the inlet pipe is connected to the distillation vessel body in a flow manner, and a liquid inlet pipe is provided at the lower end of the condenser body, the other end of the liquid inlet pipe is connected to the distillation vessel body in a flow manner.

[0009] Preferably, the drive assembly includes a second motor fixed to the upper end of the condenser body, the output end of the second motor is connected to a second drive rod, and the cam is fixedly connected to the outer wall of the second drive rod.

[0010] Preferably, the condenser body has four internal drainage blocks fixed at its four ends, and the surface of the drainage blocks is provided with an inclined surface.

[0011] Beneficial effects This invention provides a distillation vessel for processing thionyl chloride. Compared with the prior art, it has the following advantages: Firstly, the first motor of this invention starts and drives the first drive rod to rotate, which in turn drives the stirring rod to stir the material. At the same time, the scraper bracket scrapes off the material attached to the inner wall to prevent local overheating or coking of the material. When the first drive rod rotates, the second bevel gear drives the first bevel gear to rotate, which in turn drives the movable rod to rotate in the opposite direction through the third bevel gear. The movable rod rotates in the opposite direction to the first drive rod, so that the two sets of stirring components form convection, realizing opposing bidirectional stirring, making the material mix more intensely and evenly, greatly enhancing the mass and heat transfer process, and improving the mixing effect.

[0012] Secondly, the thionyl chloride vapor produced by the distillation of this invention enters the condenser body through the inlet pipe. The condenser is cooled externally, causing most of the vapor to condense into liquid. The trace droplets entrained in the vapor are intercepted by the mesh frame body during their ascent. The droplets collide with the wire mesh, coalesce and grow larger, and drip down under the action of gravity, thereby achieving gas-liquid separation and ensuring the purity of the outlet gas. When the cam rotates, it periodically presses or releases the mesh frame body. Under the reset action of the spring, the mesh frame body will generate continuous, high-frequency up-and-down vibration. The vibration can effectively shake off the viscous droplets or solid particles attached to the wire mesh channels, preventing them from clogging the mesh. The shaken-off droplets and normally condensed droplets will drip onto the guide block. The inclined surface design of the guide block will guide these liquids to collect and flow smoothly into the liquid inlet pipe, and finally return to the distillation kettle body for re-distillation, avoiding material loss, improving the material recovery rate, and reducing waste. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the distillation vessel of this utility model; Figure 3 This is a schematic diagram of the internal structure of the condenser body of this utility model; Figure 4 This is a schematic diagram of the main structure of the space frame of this utility model.

[0014] In the diagram: 1. Distillation vessel body; 2. First motor; 201. First drive rod; 202. Stirring rod; 203. Scraper bracket; 3. Support shell; 301. First bevel gear; 302. Second bevel gear; 303. Movable rod; 304. Third bevel gear; 4. Condenser body; 401. Inlet pipe; 401. Liquid inlet pipe; 402. Exhaust pipe; 5. Fixed bracket; 501. Spring; 502. Mesh frame body; 503. Second motor; 504. Second drive rod; 505. Cam; 6. Drain block; 601. Inclined surface. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-4This utility model provides a technical solution: a distillation kettle for processing thionyl chloride, comprising a distillation kettle body 1, and an installation mechanism for processing thionyl chloride provided on the distillation kettle body 1, the installation mechanism comprising: The stirring assembly includes a first drive rod 201 rotatably connected inside the main body 1 of the distillation vessel, a stirring rod 202 uniformly fixed on the outer wall of the first drive rod 201, a scraper bracket 203 with an L-shaped structure fixed on the outer wall of the first drive rod 201, a support shell 3 fixed on the inner wall of the main body 1 of the distillation vessel, and a movable rod 303 connected by a gear assembly inside the support shell 3. The recovery assembly includes a condenser body 4 fixed at the upper edge of the distillation vessel body 1. A fixing bracket 5 is fixed inside the condenser body 4. Springs 501 are fixed at the four ends of the fixing bracket 5. A mesh frame body 502 is fixed at the end of the springs 501. A cam 505 connected to the mesh frame body 502 via a drive assembly is provided on the outer wall of the mesh frame body 502.

[0017] In a preferred embodiment, a first motor 2 is fixed to the top of the distillation vessel body 1. The output end of the first motor 2 extends into the interior of the distillation vessel body 1 and is fixedly connected to the first drive rod 201. One side of the scraper bracket 203 is fitted and connected to the inner wall of the distillation vessel body 1. The gear assembly includes a first bevel gear 301 rotatably connected to one end of the support housing 3. A second bevel gear 302 is fixed to one end of the first drive rod 201 extending into the support housing 3. The second bevel gear 302 is meshed with the first bevel gear 301. The movable rod 303 passes through the support housing 3. Inside the lower end of the vessel, and at one end of the movable rod 303 extending into the support housing 3, a third bevel gear 304 is fixed. The third bevel gear 304 meshes with the lower part of the first bevel gear 301. The outer wall of the movable rod 303 is also provided with a stirring component. By the opposite rotation of the movable rod 303 and the first drive rod 201, the stirring component rotates relative to each other. When the distillation vessel enters the preheating and mixing stage, the first motor 2 fixed at the top of the distillation vessel body 1 is started. The output end of the first motor 2 drives the first drive rod 201 extending into the distillation vessel body 1 to rotate.

[0018] When the first drive rod 201 rotates, the stirring rod 202, which is uniformly fixed on its outer wall, rotates with the rod to stir the crude thionyl chloride raw material in the main body 1 of the distillation vessel, breaking the static stratification state of the raw material; at the same time, the L-shaped scraper bracket 203 fixed on the outer wall of the first drive rod 201 rotates synchronously. Since one side of the scraper bracket 203 is in contact with the inner wall of the main body 1 of the distillation vessel, it can scrape off the raw material residue attached to the vessel wall during the rotation process; The first drive rod 201 extends to one end inside the supporting housing 3 and is fixed with a second bevel gear 302. As the first drive rod 201 rotates, the second bevel gear 302 drives the first bevel gear 301, which meshes with it, to rotate. The first bevel gear 301 meshes with a third bevel gear 304 below, which in turn drives the movable rod 303, which is fixed with the third bevel gear 304, to rotate. Due to the change in the gear meshing transmission direction, the rotation direction of the movable rod 303 is opposite to that of the first drive rod 201. The stirring component on its outer wall forms a "reverse stirring" with the stirring rod 202, which further enhances the uniformity of raw material mixing and improves heat exchange efficiency.

[0019] In a preferred embodiment, an exhaust pipe 403 is provided at the upper end of the condenser body 4, an inlet pipe 401 is fixed to one side wall of the condenser body 4, and the other end of the inlet pipe 401 is connected to the distillation vessel body 1. A liquid inlet pipe 402 is provided at the lower end of the condenser body 4, and the other end of the liquid inlet pipe 402 is connected to the distillation vessel body 1. The drive assembly includes a second motor 503 fixed at the upper end of the condenser body 4, and a second drive rod 504 is connected to the output end of the second motor 503. A cam 505 is fixedly connected to the outer wall of the second drive rod 504. When the distillation enters the separation stage, thionyl chloride vapor rises from the distillation vessel body 1 and enters the condenser body 4, which is fixed to the upper edge of the distillation vessel body 1, through the inlet pipe 401. Circulating cooling water is circulated inside the condenser body 4. After steam contacts the inner wall of the condenser, it initially condenses into small liquid droplets. Some of these droplets flow along the wall surface. The fixed bracket 5 inside the condenser body 4 is connected to four ends of springs 501. The end of the springs 501 is fixed to the mesh frame body 502. The initially condensed droplets will adhere to the surface of the mesh frame body 502, increasing the droplet collection area. The second motor 503 fixed to the upper end of the condenser body 4 is started. The output end of the second motor 503 drives the second drive rod 504 to rotate. The cam 505 fixed on its outer wall rotates with the rod. During the rotation of the cam 505, it periodically squeezes the mesh frame body 502, causing the mesh frame body 502 to compress the springs 501 and generate vibration. When the protruding end of the cam 505 leaves the mesh frame body 502, the spring 501 returns to its original position, causing the mesh frame body 502 to vibrate in the opposite direction, shaking off the attached droplets.

[0020] In a preferred embodiment, a flow guide block 6 is fixed at four ends inside the condenser body 4. The surface of the flow guide block 6 is provided with an inclined surface 601, which is used to guide the droplets knocked down from the mesh frame body 502 to the liquid inlet pipe 402 and then back to the distillation kettle body 1. The liquid thionyl chloride that is shaken down falls onto the flow guide block 6 fixed at four ends inside the condenser body 4. Guided by the inclined surface 601 on the surface of the flow guide block 6, it converges to the liquid inlet pipe 402 at the lower end of the condenser body 4 and finally flows back into the distillation kettle body 1.

[0021] The first motor model is Y2-100L1-4, the second motor model is YS7124, and the condenser can be a GLL3-0.5 horizontal shell and tube condenser.

[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0023] During operation, when the distillation vessel for thionyl chloride processing is started, it first enters the preheating and mixing stage. At this time, the first motor 2, fixed at the top of the distillation vessel body 1, is activated. The output end of the first motor 2 drives the first drive rod 201, which extends into the interior of the distillation vessel body 1, to rotate. During the rotation of the first drive rod 201, the stirring rod 202, which is uniformly fixed on its outer wall, rotates with the rod, stirring the crude thionyl chloride raw material in the distillation vessel body 1 to break the static stratification state of the raw material. At the same time, the L-shaped scraper support 203, which is fixed on the outer wall of the first drive rod 201, rotates synchronously to scrape off the raw material residue adhering to the vessel wall. The first drive rod 201 extends into the inner wall of the distillation vessel body 1 and is fixed to the support. A second bevel gear 302 is fixed at one end inside the shell 3. As the first drive rod 201 rotates, the second bevel gear 302 drives the first bevel gear 301, which meshes with it and is rotatably connected to one end of the supporting shell 3, to rotate. The first bevel gear 301 meshes with a third bevel gear 304, which extends through the lower end of the supporting shell 3 and is fixed at one end inside the supporting shell 3. This drives the moving rod 303 to rotate. Because the gear meshing transmission direction changes, the rotation direction of the moving rod 303 is opposite to that of the first drive rod 201. The stirring component on its outer wall forms a "reverse stirring" with the stirring rod 202, which further enhances the uniformity of raw material mixing and improves heat exchange efficiency. When the equipment enters the distillation separation stage, thionyl chloride vapor rises from the main body 1 of the distillation vessel and enters the condenser body 4, which is fixed to the upper edge of the main body 1 of the distillation vessel, through the inlet pipe 401 fixed to one side wall of the condenser body 4. Circulating cooling water flows into the condenser body 4. After the vapor contacts the inner wall of the condenser, it is initially condensed into small liquid droplets. Some droplets flow along the wall surface. Simultaneously, the springs 501 fixed at four ends of the fixed bracket 5 inside the condenser body 4, and the mesh frame body 502 fixed at the end of the bracket collect the initially condensed droplets to increase the droplet collection area. At this time, the second motor 503 fixed to the upper end of the condenser body 4 is started. The second drive rod 504 connected to the output end of the second motor 503 rotates, driving... The cam 505 fixed on its outer wall rotates. During the rotation of the cam 505, it periodically squeezes the mesh frame body 502, causing the mesh frame body 502 to compress the spring 501 and generate vibration. When the protruding end of the cam 505 leaves the mesh frame body 502, the spring 501 returns to its original position and drives the mesh frame body 502 to vibrate in the opposite direction, shaking off the attached liquid droplets. The shaken-off liquid thionyl chloride drips onto the four-end fixed guide block 6 inside the condenser body 4. Guided by the inclined surface 601 on the surface of the guide block 6, it converges to the liquid inlet pipe 402 set at the lower end of the condenser body 4 and finally flows back into the distillation kettle body 1. The small amount of light impurity gas that has not been condensed in the condenser body 4 is discharged through the exhaust pipe 403 set at its upper end.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A distillation vessel for processing thionyl chloride, comprising a distillation vessel body (1), characterized in that: The main body (1) of the distillation vessel is provided with an installation mechanism for thionyl chloride processing, the installation mechanism including: The stirring assembly includes a first drive rod (201) rotatably connected inside the main body (1) of the distillation vessel. Stirring rods (202) are uniformly fixed on the outer wall of the first drive rod (201). A scraper bracket (203) with an L-shaped structure is fixed on the outer wall of the first drive rod (201). A supporting shell (3) is fixed on the inner wall of the main body (1). A movable rod (303) connected by a gear assembly is provided inside the supporting shell (3). The recovery assembly includes a condenser body (4) fixed at the upper edge of the distillation vessel body (1), a fixed bracket (5) fixed inside the condenser body (4), springs (501) fixed at the four ends of the fixed bracket (5), a mesh frame body (502) fixed at the end of the springs (501), and a cam (505) connected by a drive assembly on the outer wall of the mesh frame body (502).

2. The distillation kettle for processing thionyl chloride according to claim 1, characterized in that: The top of the distillation vessel body (1) is fixed with a first motor (2), the output end of the first motor (2) extends into the interior of the distillation vessel body (1) and is fixedly connected to the first drive rod (201), and one side of the scraper bracket (203) is fitted and connected to the inner wall of the distillation vessel body (1).

3. The distillation vessel for processing thionyl chloride according to claim 1, characterized in that: The gear assembly includes a first bevel gear (301) rotatably connected to one end of the supporting housing (3), a second bevel gear (302) fixed to one end of the first drive rod (201) extending to the supporting housing (3), the second bevel gear (302) meshing with the first bevel gear (301), the movable rod (303) penetrating the lower end of the supporting housing (3), and a third bevel gear (304) fixed to one end of the movable rod (303) extending into the supporting housing (3), the third bevel gear (304) meshing with the lower part of the first bevel gear (301).

4. The distillation kettle for processing thionyl chloride according to claim 1, characterized in that: The upper end of the condenser body (4) is provided with an exhaust pipe (403), and an air inlet pipe (401) is fixed on one side wall of the condenser body (4). The other end of the air inlet pipe (401) is connected to the distillation vessel body (1) in a flow manner. The lower end of the condenser body (4) is provided with a liquid inlet pipe (402), and the other end of the liquid inlet pipe (402) is connected to the distillation vessel body (1) in a flow manner.

5. The distillation kettle for processing thionyl chloride according to claim 1, characterized in that: The drive assembly includes a second motor (503) fixed to the upper end of the condenser body (4), the output end of the second motor (503) is connected to a second drive rod (504), and the cam (505) is fixedly connected to the outer wall of the second drive rod (504).

6. The distillation kettle for processing thionyl chloride according to claim 1, characterized in that: The condenser body (4) has four internal drainage blocks (6) fixed at its four ends, and the surface of the drainage blocks (6) is provided with an inclined surface (601).

Images