High-efficiency acyl chloride reaction kettle

Abstract

The utility model provides a kind of acyl chloride efficient reaction kettle, it is specifically related to the field of reaction kettle technology, it is characterized by: the kettle body top is equipped with feed hopper, the feed hopper surface is equipped with sealing cover, the feed hopper one side is equipped with motor and spraying component, the motor output end is connected with belt upwards, the other end of the belt is connected with pulley, the pulley is equipped with stirring shaft, the stirring shaft vertically penetrates kettle body top center, extends to its inside, the stirring shaft is equipped with sealing assembly with kettle body top junction, and stirring shaft is located kettle body inside endpoint fixedly connected with anchor type stirring paddle, wherein upper portion is connected with vortex stirring paddle, the utility model uses the combination structure of anchor type stirring paddle and vortex stirring paddle, anchor type paddle is adapted to reduce high viscosity material adhering on kettle inner wall, the inclined vane plate of vortex paddle forces liquid to form axial, radial three-dimensional circulation, cooperate with conical kettle bottom, completely eliminate flow dead zone.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, specifically to a high-efficiency acyl chloride reaction vessel. Background Technology

[0002] An acyl chloride reactor is a vessel used for acyl chloride reactions, which are widely used in pesticides and pharmaceuticals. The production process typically involves vigorous reactions such as those involving carboxylic acids and thionyl chloride, exhibiting characteristics such as strong corrosivity, easy hydrolysis, and numerous byproducts. Traditional reactors have significant shortcomings in the preparation of acyl chlorides.

[0003] 1. Conventional stirring paddles are difficult to adapt to dynamic changes in the reaction system from low viscosity to high viscosity, resulting in uneven local reactions;

[0004] 2. Due to the limited heat transfer area and short flow path, it is difficult to quickly remove the heat generated by the violent reaction, which can easily cause local overheating and lead to violent boiling.

[0005] 3. When a protective gas is introduced, the gas tends to escape from the liquid surface and is difficult to disperse evenly into the deep layers of the reaction system, affecting reaction efficiency and safety.

[0006] 4. Insufficient sealing of the solid raw material feeding port can easily introduce moisture, leading to hydrolysis of acyl chloride; the flat-bottomed reactor structure can easily create liquid dead zones, and residual liquid may cause risks to subsequent operations.

[0007] Therefore, to address the aforementioned technical issues, a specialized acyl chloride reactor with precise temperature control, efficient mixing, and reliable sealing characteristics was designed. Utility Model Content

[0008] The purpose of this invention is to provide a high-efficiency acyl chloride reaction vessel to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency acyl chloride reaction vessel, comprising a vessel body, a feed hopper, a motor, and a discharge port, characterized in that: a feed hopper is provided at the top of the vessel body, a sealing cover is provided on the surface of the feed hopper, a motor and a spray assembly are provided on one side of the feed hopper, a belt is connected to the output end of the motor facing upwards, a pulley is connected to the other end of the belt, a stirring shaft is sleeved inside the pulley, the stirring shaft vertically penetrates the center of the top of the vessel body and extends into its interior, a sealing assembly is provided at the connection between the stirring shaft and the top of the vessel body, and an anchor-type stirring paddle is fixedly connected to the end of the stirring shaft located inside the vessel body, wherein a vortex stirring paddle is connected to the upper part, a temperature control cavity is provided on the outer wall of the vessel body, the temperature control cavity is integrally formed with the vessel body and is spirally distributed along the circumference of the vessel body, and a temperature control cavity inlet and a temperature control cavity outlet are respectively provided, a heat insulation layer is provided annularly on the outer wall of the temperature control cavity, and a discharge port is provided at the bottom of the vessel body, and a solenoid valve is provided in the middle of the discharge port for controlling its opening and closing.

[0010] Preferably, the bottom of the vessel is conical, which helps to reduce the dead zone of the liquid, and the conical bottom is matched with the anchor-type stirring paddle.

[0011] Preferably, the vortex stirring paddle is provided with multiple inclined blades in a ring, which facilitates the effective propulsion of liquid flow and forms a highly efficient mixing effect.

[0012] Preferably, the spray assembly includes a spray inlet pipe, a spray pipe, spray nozzles, and a buckle. The spray inlet pipe is located on the other side of the feed hopper at the top of the vessel body. The spray inlet pipe passes through the top of the vessel body and is connected to the upper surface of the spray pipe. The spray pipe is horizontally set at the top of the vessel body and is fixed by the buckle. Spray nozzles are provided at both ends of the spray pipe.

[0013] Preferably, the stirring shaft has a hollow internal structure and an air inlet pipe is provided at the top.

[0014] Preferably, the sealing assembly comprises a sealing bearing and a sealing sleeve. The sealing bearing is located at the connection between the top of the vessel body and the stirring shaft, and the sealing sleeve is located in the hollow position between the air inlet pipe and the stirring shaft.

[0015] Preferably, the air inlet pipe extends to the end of the hollow interior of the stirring shaft and is equipped with a one-way valve, and the bottom end of the hollow stirring shaft is symmetrically provided with nozzles, so that the gas can directly enter the bottom of the liquid through the nozzles and then be mixed evenly by stirring.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model adopts a combination structure of anchor-type stirring paddle and vortex stirring paddle. The anchor-type paddle is adapted to reduce the high viscosity materials adhering to the inner wall of the vessel. The inclined blades of the vortex paddle force the liquid to form an axial and radial three-dimensional circulation. Combined with the conical bottom of the vessel, the flow dead zone is completely eliminated. Combined with the spirally distributed temperature control cavity, the effective heat exchange area is increased. Combined with the external insulation layer, the temperature of the reaction vessel can be quickly responded to and stably maintained, avoiding local overheating that leads to boiling or side reactions.

[0018] 2. This utility model uses nozzles symmetrically arranged at the bottom of the hollow stirring shaft to directly deliver gas to the deep layer inside the reactor. Combined with a one-way valve to prevent liquid backflow, it effectively isolates moisture and inhibits hydrolysis reaction. The feed hopper sealing cover, stirring shaft sealing assembly (sealed bearing + sealing sleeve) and solenoid valve control the discharge port, working together to block the intrusion of external moisture and the leakage of internal materials. The conical bottom design of the reactor body ensures zero material residue and eliminates the risk of cross-contamination. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention.

[0020] Figure 2This is a three-dimensional view of the vortex stirring paddle of this utility model.

[0021] Figure 3 This is a cross-sectional view of the sealing component of this utility model.

[0022] Figure 4 for Figure 1 Enlarged diagram of point B in the middle.

[0023] The components in the attached diagram are labeled as follows: 1: vessel body, 2: feed hopper, 3: sealing cover, 4: motor, 51: spray inlet pipe, 52: spray pipe, 53: spray nozzle, 54: buckle, 6: belt, 7: pulley, 8: stirring shaft, 9: sealing assembly, 91: sealing bearing, 92: sealing sleeve, 10: anchor-type stirring paddle, 11: vortex stirring paddle, 111: inclined blade, 12: temperature control chamber, 121: temperature control chamber inlet, 122: temperature control chamber outlet, 13: insulation layer, 14: discharge port, 15: solenoid valve, 16: air inlet pipe, 17: one-way valve, 18: nozzle. Detailed Implementation

[0024] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0025] like Figures 1 to 4The diagram shows a high-efficiency acyl chloride reaction vessel, comprising a vessel body 1, a feed hopper 2, a motor 4, and a discharge port 14. The vessel body 1 is integrally formed from stainless steel, with the feed hopper 2 welded to the top and a rubber sealing cap 3 on its surface. The motor 4 is fixed to the top of the vessel body 1 by a bracket, and its output end drives a pulley 7 via a belt 6. A stirring shaft 8 is fixedly sleeved inside the pulley 7, and the stirring shaft 8 passes through a sealing assembly 9 at the top of the vessel body 1. Its lower end is connected to an anchor-type stirring paddle 10, and the upper part is equipped with a vortex stirring paddle 11. The paddle blades contain six inclined blades 111, which generate a strong axial flow, pushing the material to form a three-dimensional circulation, working in conjunction with the anchor-type stirring paddle 10. To achieve efficient mixing across the entire area, the outer wall of the vessel body 1 integrates a spirally rising temperature control chamber 12, which is covered with an insulation layer 13. A spray inlet pipe 51 is installed through the top of the vessel body 1, and the end of the spray inlet pipe 51 is connected to the spray pipe 52. The spray pipe 52 is horizontally fixed to the top of the vessel body 1 by a buckle 54, and spray nozzles 53 are opened at both ends facing the vessel wall. The stirring shaft 8 is hollow inside, and the top is connected to the air inlet pipe 16. Two nozzles 18 are symmetrically opened at the bottom of the hollow shaft. A one-way valve 17 is provided at the inlet of the air inlet pipe 16. The bottom of the vessel body 1 is conical and cooperates with the anchor-type stirring paddle 10. The discharge port 14 is located at the center of the conical bottom and is equipped with a solenoid valve 15.

[0026] Conventional acyl chloride reaction: First, benzoic acid is added to the feed hopper 2, the sealing cover 3 is closed, the motor 4 is started to drive the belt 6 to drive the pulley 7, so that the stirring shaft 8 rotates at a constant speed. The anchor-type stirring paddle 10 rotates in conjunction with the inner wall of the conical bottom of the vessel to scrape off the adhering material. At the same time, the inclined blades 111 of the vortex stirring paddle 11 push the liquid to form an axial vortex. The refrigerant is introduced through the temperature control chamber inlet 121. The spiral temperature control chamber 12 quickly absorbs the heat of reaction, and the insulation layer 13 maintains a low temperature environment.

[0027] After the reaction starts, thionyl chloride is injected into the spray pipe 52 through the spray inlet pipe 51 and evenly dispersed onto the liquid surface through the spray nozzle 93. The gas generated by the reaction is introduced into the hollow stirring shaft 8 through the gas inlet pipe 16, and the backflow is blocked by the one-way valve 17. Finally, it is released into the deep liquid phase through the bottom nozzle 18, where it is dispersed by the vortex propeller to promote gas-liquid mixing. When the reaction ends, the solenoid valve 15 is opened. The conical bottom design ensures that the material is discharged with zero residue through the discharge port 14.

[0028] Synthesis of highly active acyl chlorides: Phosgene is introduced through the inlet pipe 16, and the one-way valve 17 prevents moisture intrusion. The stirring shaft 8 quickly drives the dual paddles: the anchor-type stirring paddle 10 prevents high-viscosity materials from sticking to the wall, and the inclined blades 111 of the vortex stirring paddle 11 enhance the radial force, so that the phosgene is quickly dispersed after being sprayed out through the nozzle 18. The temperature control chamber 12 is filled with circulating water at about 25°C. The spiral structure increases the heat exchange area, and the temperature fluctuation is controlled at a suitable temperature by the insulation layer 13. The catalyst solution is added to the spray assembly in the middle of the reaction, and the multi-point distribution of material is achieved by the spray pipe 92 fixed by the buckle 94. During the discharge stage, the solenoid valve 15 precisely controls the flow rate to avoid material splashing.

[0029] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A high-efficiency acyl chloride reaction vessel, comprising a vessel body (1), a feed hopper (2), a motor (4), and a discharge port (14), characterized in that: The top of the vessel body (1) is provided with a feeding hopper (2), and the surface of the feeding hopper (2) is provided with a sealing cover (3). A motor (4) and a spray assembly are provided on one side of the feeding hopper (2). The output end of the motor (4) is connected to a belt (6) facing upwards. The other end of the belt (6) is connected to a pulley (7). A stirring shaft (8) is fitted inside the pulley (7). The stirring shaft (8) vertically penetrates the center of the top of the vessel body (1) and extends into its interior. A sealing assembly (9) is provided at the connection between the stirring shaft (8) and the top of the vessel body (1), and the stirring shaft (8) is located in the vessel body (1). An anchor-type stirring paddle (10) is fixedly connected to the internal end, and a vortex stirring paddle (11) is connected to the upper part. A temperature control cavity (12) is provided on the outer wall of the vessel body (1). The temperature control cavity (12) is integrally formed with the vessel body (1) and is spirally distributed along the circumference of the vessel body (1). A temperature control cavity inlet (121) and a temperature control cavity outlet (122) are respectively provided. A heat insulation layer (13) is provided in a ring on the outer wall of the temperature control cavity (12). A discharge port (14) is provided at the bottom of the vessel body (1). A solenoid valve (15) is provided in the middle of the discharge port (14) for controlling the opening and closing.

2. The high-efficiency acyl chloride reaction vessel as described in claim 1, characterized in that: The bottom of the vessel body (1) is conical, which helps to reduce the dead zone of the liquid, and the conical bottom is matched with the anchor-type stirring paddle (10).

3. The high-efficiency acyl chloride reaction vessel as described in claim 1, characterized in that: The vortex stirring paddle (11) is provided with multiple inclined blades (111) in a ring, which facilitates the effective flow of liquid and forms a highly efficient mixing effect.

4. The high-efficiency acyl chloride reaction vessel as described in claim 1, characterized in that: The spray assembly includes a spray inlet pipe (51), a spray pipe (52), a spray nozzle (53), and a buckle (54). The spray inlet pipe (51) is located on the other side of the feed hopper (2) at the top of the vessel body (1). The spray inlet pipe (51) passes through the top of the vessel body (1) and is connected to the upper surface of the spray pipe (52). The spray pipe (52) is horizontally set at the top inside the vessel body (1) and is fixed by the buckle (54). Spray nozzles (53) are opened at both ends of the spray pipe (52).

5. The high-efficiency acyl chloride reaction vessel as described in claim 1, characterized in that: The stirring shaft (8) has a hollow structure inside and an air inlet pipe (16) is provided at the top.

6. The high-efficiency acyl chloride reaction vessel as described in claim 1, characterized in that: The sealing assembly (9) consists of a sealing bearing (91) and a sealing sleeve (92). The sealing bearing (91) is located at the connection between the top of the vessel body (1) and the stirring shaft (8), while the sealing sleeve (92) is located in the hollow position between the air inlet pipe (16) and the stirring shaft (8).

7. The high-efficiency acyl chloride reaction vessel as described in claim 5, characterized in that: The air inlet pipe (16) extends to the hollow inner end of the stirring shaft (8) and is equipped with a one-way valve (17). The bottom end of the hollow stirring shaft (8) is symmetrically provided with nozzles (18), which facilitates the gas to directly enter the bottom of the liquid through the nozzles (18) and then mix the gas and liquid evenly through stirring.

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