A reaction kettle for safe processing of propamocarb hydrochloride

Abstract

The utility model discloses a kind of reaction kettle for safe processing of propamocarb hydrochloride, it is related to the technical field of reaction kettle, including kettle body, the top end of kettle body is fixedly connected and is communicated with pressure tank, the top end of pressure tank is fixedly connected with sealing sleeve, annular trapezoidal groove is established at the bottom end of sealing sleeve, the top of the kettle body is equipped with gas-permeable cover, the gas-permeable cover is arranged in pressure tank, spring is equipped between the top surface of gas-permeable cover and the inner wall of pressure tank, the gas-permeable cover is slidably sleeved in the outer wall of sealing sleeve.The utility model reduces the substance transfer and reaction rate in reaction kettle directly by reducing stirring rate in the initial stage of pressure rise, to inhibit the continuous generation of pressure from the root cause.This way avoids material loss, production interruption and environmental pollution caused by sudden pressure relief, realizes the "initiative, gentle" regulation and control of production process, and guarantees product quality and the continuity of production.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a reaction vessel for the safe processing of cymoxanil hydrochloride. Background Technology

[0002] Cymoxanil hydrochloride, as a highly effective and low-toxicity systemic fungicide, typically involves complex chemical reactions during its synthesis, often carried out in a reactor under heating and pressure. This process places extremely stringent demands on the control of reaction conditions, particularly the stable control of pressure within the reactor. Abnormal pressure increases can not only interrupt the reaction and affect product yield and quality, but may also lead to material leakage or even serious safety accidents.

[0003] In existing technologies, the safety valves or rupture discs commonly used in reactors for processing cymoxanil hydrochloride or similar fine chemicals are passive pressure relief devices. They only open momentarily when the pressure exceeds a very high set value. This "all or nothing" control method cannot intervene and regulate the gradual increase in pressure in the early stages, which can easily lead to sudden interruption of the reaction, resulting in batch product defects. Furthermore, the pressure relief process may cause material loss and environmental pollution. Utility Model Content

[0004] The purpose of this invention is to provide a safe reaction vessel for processing cymoxanil hydrochloride, in order to solve the problem mentioned in the background art that the existing reaction vessels cannot be intervened and adjusted in the early stage of depressurization, which may cause material loss and environmental pollution during the depressurization process.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reaction vessel for safe processing of cymoxanil hydrochloride, comprising a vessel body, a pressure tank fixedly connected and connected to the top of the vessel body, a sealing sleeve fixedly connected to the top of the pressure tank, and an annular trapezoidal groove provided at the bottom of the sealing sleeve; The top of the vessel body is provided with a vent hood, which is installed inside the pressure tank. A spring is provided between the top surface of the vent hood and the inner wall of the pressure tank. The vent hood is slidably sleeved on the outer wall of the sealing sleeve. Two connecting rods are fixedly connected to the bottom end of the vent hood. The bottom ends of the two connecting rods penetrate the vessel body and are fixedly connected to support blocks. The top surface of the two support blocks is provided with friction blocks that can slide along the top surface of the support blocks. The friction blocks are in the shape of a semi-annular trapezoid and are adapted to an annular trapezoidal groove. The opposite surfaces of the two friction blocks are provided with grooves, and friction plates are fixedly connected to the curved surface of the grooves. The sealing sleeve is rotatably connected to a rotating rod, which is located between two friction blocks. The top of the pressure tank is equipped with a driving device, which is used to drive the rotating rod to rotate. A stirring device is fixedly connected to the rod wall of the rotating rod. The outer wall of the vessel is fixedly connected to a circulation device for circulating the solution inside the vessel; The pressure tank is equipped with an exhaust device on its top surface. A pressure gauge that is in communication with the pressure tank is fixedly connected to the top surface of the pressure tank. A temperature gauge that is in communication with the vessel body is fixedly connected to the outer wall of the vessel body. An inlet is fixedly connected to the top of the pressure tank. A discharge pipe is fixedly connected to the bottom of the vessel body. A manual valve is fixedly connected to the outer wall of the discharge pipe.

[0006] Preferably, a connecting block is fixedly connected to the bottom end of the friction block, the connecting block is located at the center of the bottom surface of the friction block, rollers are rotatably connected to both sides of the connecting block, a sliding groove is opened on the top surface of the support block, a limiting groove is opened inside the sliding groove, and the rollers are embedded in the limiting groove.

[0007] Preferably, the driving device includes a servo motor and a reducer fixedly connected to the top surface of the pressure tank, the output end of the servo motor being fixedly connected to the input end of the reducer, and the output end of the reducer being fixedly connected to the top end of the rotating rod.

[0008] Preferably, the stirring device includes at least two stirring blades fixedly installed on the outer wall of the rotating rod, the at least two stirring blades being arranged vertically at intervals along the axial direction of the rotating rod, and adjacent stirring blades being perpendicular to each other.

[0009] Preferably, the exhaust device includes an exhaust pipe fixed to the top of the pressure tank, the exhaust pipe being connected to the pressure tank, a filter box being fixedly connected to the top of the exhaust pipe, a filter plate being fixedly connected inside the filter box, and an electric valve being fixedly connected to the outer wall of the exhaust pipe.

[0010] Preferably, the circulation device includes a circulation pump fixed to the outer wall of the vessel body, the input end of the circulation pump being connected to the vessel body, the output end of the circulation pump being fixedly connected to a water pipe, and the other end of the water pipe being connected to the vessel body.

[0011] Preferably, a control unit is provided on one side of the vessel body, and the control unit is connected to the electric valve, pressure gauge and temperature gauge via electrical signals.

[0012] The technical effects and advantages of this invention are as follows: By reducing the stirring rate at the initial stage of pressure rise, this invention slows down the material transfer and reaction rate within the reactor, thereby fundamentally inhibiting the continuous generation of pressure. This method avoids material loss, production interruption, and environmental pollution caused by sudden pressure relief, achieving "proactive and gentle" control of the production process and ensuring product quality and production continuity. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the breathable cover part of this utility model.

[0016] Figure 4 This is a schematic diagram of the friction block structure of this utility model.

[0017] Figure 5 This is a schematic diagram of the support block structure of this utility model.

[0018] In the diagram: 1. Vessel body; 11. Pressure tank; 12. Sealing sleeve; 13. Trapezoidal groove; 2. Servo motor; 21. Rotating rod; 22. Stirring blade; 3. Vent cover; 31. Connecting rod; 32. Support block; 321. Limiting groove; 33. Friction block; 331. Connecting block; 332. Roller; 34. Groove; 35. Spring; 4. Circulating pump; 41. Water pipe; 5. Exhaust pipe; 51. Electric valve; 52. Filter box; 6. Pressure gauge; 7. Thermometer; 8. Discharge pipe; 81. Manual valve; 9. Inlet. Detailed Implementation

[0019] 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.

[0020] This utility model provides, for example Figure 1-5 The reactor shown is a safe processing vessel for cymoxanil hydrochloride, including a vessel body 1. The top of the vessel body 1 is fixedly connected to and communicates with a pressure tank 11. The top of the pressure tank 11 is fixedly connected to a sealing sleeve 12. The bottom of the sealing sleeve 12 is provided with an annular trapezoidal groove 13. The top of the vessel body 1 is provided with a vent hood 3, which is installed inside the pressure tank 11. The vent hood 3 is slidably sleeved on the outer wall of the sealing sleeve 12. The bottom end of the vent hood 3 is fixedly connected to two connecting rods 31. The bottom ends of the two connecting rods 31 penetrate the vessel body 1 and are fixedly connected to support blocks 32. The top surface of the two support blocks 32 is provided with friction blocks 33 that can slide along the top surface of the support blocks 32. The friction blocks 33 are in the shape of a semi-circular trapezoid and are adapted to the annular trapezoidal groove 13. The opposite surfaces of the two friction blocks 33 are provided with grooves 34, and the curved surface of the grooves 34 is fixedly connected to friction plates. The sealing sleeve 12 is rotatably connected to a rotating rod 21. Two grooves 34 are adapted to the rotating rod 21. The top of the pressure tank 11 is provided with a driving device, which is used to drive the rotating rod 21 to rotate. The rod wall of the rotating rod 21 is fixedly connected to a stirring device. A circulation device for circulating the solution inside the vessel is fixedly connected to the outer wall of the vessel body 1; The pressure tank 11 is equipped with an exhaust device on its top surface. A pressure gauge 6, which is connected to the pressure tank 11, is fixedly connected to the top surface of the pressure tank 11. A temperature gauge 7, which is connected to the outer wall of the vessel body 1, is fixedly connected to the outer wall of the vessel body 1. An inlet 9 is fixedly connected to the top of the pressure tank 11. A discharge pipe 8 is fixedly connected to the bottom of the vessel body 1. A manual valve 81 is fixedly connected to the outer wall of the discharge pipe 8. Both the vessel body 1 and the pressure tank 11 of this utility model are made of corrosion-resistant stainless steel and are connected by a flange seal. A sealing sleeve 12 is welded to the center of the top of the pressure tank 11, and an annular trapezoidal groove 13 is machined into its inner bottom end. An annular vent 3 is fitted over the sealing sleeve 12 and can slide up and down. The sliding surface can be made of a low-friction coefficient material (such as polytetrafluoroethylene) to reduce resistance. The top of the vent 3 communicates with the interior of the pressure tank 11 to sense pressure, and two springs 35 are installed between its bottom and the top wall of the pressure tank 11 to abut against the top surface of the pressure tank 11. Two connecting rods 31 are symmetrically welded to the bottom of the vent hood 3. They pass through through holes in the side wall of the vessel body 1. It is worth noting that the size of the through holes is slightly larger than the size of the connecting rods 31. Support blocks 32 are fixed at their ends. A horizontally sliding friction block 33 is mounted on each support block 32 via rollers 332 at its bottom. On the opposite surfaces of the two friction blocks 33, friction plates based on asbestos rubber or semi-metallic materials are fixed with high-strength adhesive to form a braking surface with a high coefficient of friction.

[0021] The rotating rod 21 is mounted inside the sealing sleeve 12 via a sealing bearing integrating a lip seal ring. Its lower end extends into the vessel body 1, and its upper end is connected to the drive device. The shaft of the rotating rod 21 is positioned precisely between the friction plates of the two friction blocks 33. Initially, the spring 35 keeps the vent 3 at its lower limit, and the friction blocks 33 are separated. When the pressure inside the pressure tank 11 increases, the air pressure inside the pressure tank 11 pushes the vent 3 upward. Through the inclined surface or lever structure of the connecting rod 31 and the support block 32, the two friction blocks 33 are forced to move towards each other, ultimately causing the friction plates to grip the rotating rod 21, generating a braking torque, reducing the stirring speed of the rotating rod 21, and thus slowing down the mass transfer and reaction rate inside the reactor. When using the product, first add the reactants to the inlet 9 and stir them with the stirring device to allow the reactants to react. When the pressure gauge 6 shows that the pressure inside the pressure tank 11 is too high, release the pressure by venting the gas through the venting device. After the reaction is complete, open the manual valve 81 to discharge the material.

[0022] like Figure 3 and Figure 4 As shown, a connecting block 331 is fixedly connected to the bottom end of the friction block 33. The connecting block 331 is located at the center of the bottom surface of the friction block 33. Rollers 332 are rotatably connected to both sides of the connecting block 331. A sliding groove is provided on the top surface of the support block 32. A limiting groove 321 is provided inside the sliding groove. The rollers 332 are embedded in the limiting groove 321. A connecting block 331 is welded to the center of the bottom of the friction block 33. Miniature deep groove ball bearings are mounted on both sides of the connecting block 331 as rollers 332 via short shafts. A groove is machined into the top surface of the support block 32 using a milling machine, and limiting grooves 321 matching the diameter of the rollers 332 are milled on both sides of the groove. During assembly, the rollers 332 are precisely embedded into the limiting grooves 321.

[0023] like Figure 1 As shown, the drive device includes a servo motor 2 and a reducer fixedly connected to the top surface of the pressure tank 11. The output end of the servo motor 2 is fixedly connected to the input end of the reducer, and the output end of the reducer is fixedly connected to the top end of the rotating rod 21. This converts sliding friction into rolling friction, greatly reducing the resistance when the friction block 33 moves, and ensuring that the braking system can respond sensitively and easily to pressure changes. The servo motor 2 and the reducer are mounted on top of the pressure tank 11 via a common base. The output shaft of the servo motor 2 is connected to the input shaft of the reducer 20 via a quincunx coupling, and the output shaft of the reducer 20 is fixed to the top of the rotating rod 21 via a rigid flange coupling. The servo motor 2, in conjunction with the reducer, can provide a smooth and powerful stirring torque, and can achieve precise control and wide-range adjustment of the speed, perfectly adapting to the different stirring intensity requirements of each stage in the synthesis process of cymoxanil hydrochloride.

[0024] like Figure 2 As shown, the stirring device includes at least two stirring blades 22 fixedly installed on the outer wall of the rotating rod 21. The at least two stirring blades 22 are arranged vertically at intervals along the axial direction of the rotating rod 21, and adjacent stirring blades 22 are perpendicular to each other. Two stirring blades 22 are welded or connected by keys at different heights on the rotating rod 21. The upper blades are of the folding blade type, with their blades at a certain angle to the plane of rotation, mainly generating axial flow. The lower blades are of the straight blade turbine type, with their blades perpendicular to the plane of rotation, mainly generating radial flow. The two layers of blades are installed at a 90-degree angle offset in the circumferential position. The combination of the upper and lower layers of blades with different configurations can simultaneously form strong axial circulation and radial shear within the reactor, generating a complex three-dimensional flow field, completely eliminating the stirring dead zone, ensuring a high degree of uniformity of reactants, heat, and concentration, and significantly improving reaction efficiency and product yield.

[0025] like Figure 1As shown, the exhaust device includes an exhaust pipe 5 fixed to the top of the pressure tank 11. The exhaust pipe 5 is connected to the pressure tank 11. A filter box 52 is fixedly connected to the top of the exhaust pipe 5. A filter plate is fixedly connected inside the filter box 52. An electric valve 51 is fixedly connected to the outer wall of the exhaust pipe 5. An interface is made at the top of the vessel body 1, and an exhaust pipe 5 is welded thereon. A normally closed electric ball valve, serving as an electric valve 51, is installed on the exhaust pipe 5 near the vessel body 1. An openable filter box 52 is connected to the end of the exhaust pipe 5. The box contains multiple layers of filter material, such as stainless steel wire mesh and activated carbon filter elements. The filter box 52 effectively captures and adsorbs harmful substances and odors in the exhaust gas, preventing harm to the environment and personnel, and meeting environmental protection requirements.

[0026] like Figure 1 As shown, the circulation device includes a circulation pump 4 fixed to the outer wall of the vessel body 1. The input end of the circulation pump 4 is connected to the vessel body 1, and the output end of the circulation pump 4 is fixedly connected to a water pipe 41. The other end of the water pipe 41 is connected to the vessel body 1. A corrosion-resistant magnetically driven centrifugal pump is selected as the circulation pump 4 and fixed to the outer wall of the vessel body 1 by a bracket. The inlet of the circulation pump 4 is connected to the outlet valve at the bottom of the vessel body 1 by a pipe, and the outlet of the circulation pump 4 is connected to the inlet valve at the top of the vessel body 1 by a stainless steel water pipe 41. Through forced external circulation, solids or high-density liquids that may settle at the bottom of the vessel are transported back to the top of the vessel, forming a double mixture with the internal stirring, further ensuring the homogeneity of the reaction system and preventing local overheating or excessive concentration.

[0027] like Figure 1 As shown, a control unit is provided on one side of the vessel body 1. The control unit is connected to the electric valve 51, pressure gauge 6 and temperature gauge 7 via electrical signals. An industrial PLC, such as an S7-1200, is used as the control unit and installed in an explosion-proof control cabinet. The signal output terminals of the pressure gauge 6 mounted on the top of the pressure tank 11 and the temperature gauge 7 mounted on the side wall of the vessel 1 are connected to the PLC's analog input module. The control line of the electric valve 51 is connected to the PLC's digital output module. The PLC program is set with a first preset pressure threshold of 0.55 MPa (this value is higher than the starting pressure of the mechanical braking system). When the control unit receives a signal value from pressure gauge 6 that continuously exceeds 0.55 MPa for three seconds, it determines that the mechanical braking has failed to effectively control the pressure and immediately sends a signal from the digital output point to drive the electric valve 51 to fully open for emergency pressure relief.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reaction vessel for the safe processing of cymoxanil hydrochloride, comprising a vessel body (1), characterized in that: The top of the vessel body (1) is fixedly connected to and communicates with a pressure tank (11), and the top of the pressure tank (11) is fixedly connected to a sealing sleeve (12), and the bottom of the sealing sleeve (12) is provided with an annular trapezoidal groove (13). The top of the vessel body (1) is provided with a vent hood (3), which is installed inside the pressure tank (11). A spring (35) is provided between the top surface of the vent hood (3) and the inner wall of the pressure tank (11). The vent hood (3) is slidably sleeved on the outer wall of the sealing sleeve (12). Two connecting rods (31) are fixedly connected to the bottom end of the vent hood (3). The bottom ends of the two connecting rods (31) penetrate the vessel body (1) and are fixedly connected to support blocks (32). The top surfaces of the two support blocks (32) are provided with friction blocks (33) that can slide along the top surface of the support blocks (32). The friction blocks (33) are half an annular trapezoidal shape and are adapted to the annular trapezoidal groove (13). The opposite surfaces of the two friction blocks (33) are provided with grooves (34). The curved surface of the grooves (34) is fixedly connected with friction plates. The sealing sleeve (12) is rotatably connected to a rotating rod (21), which is located between two friction blocks (33). The top of the pressure tank (11) is provided with a driving device, which is used to drive the rotating rod (21) to rotate. The rod wall of the rotating rod (21) is fixedly connected to a stirring device. The outer wall of the vessel body (1) is fixedly connected to a circulation device for circulating the solution inside the vessel; The pressure tank (11) is provided with an exhaust device on its top surface. A pressure gauge (6) is fixedly connected to the top surface of the pressure tank (11) and communicates with the pressure tank (11). A thermometer (7) is fixedly connected to the outer wall of the vessel body (1) and communicates with the vessel body (1). An inlet (9) is fixedly connected to the top of the pressure tank (11). A discharge pipe (8) is fixedly connected to the bottom of the vessel body (1). A manual valve (81) is fixedly connected to the outer wall of the discharge pipe (8).

2. The reaction vessel for safe processing of cymoxanil hydrochloride according to claim 1, characterized in that: The bottom end of the friction block (33) is fixedly connected to a connecting block (331). The connecting block (331) is located at the center of the bottom surface of the friction block (33). Rollers (332) are rotatably connected to both sides of the connecting block (331). A sliding groove is provided on the top surface of the support block (32). A limiting groove (321) is provided inside the sliding groove. The rollers (332) are embedded in the limiting groove (321).

3. The reaction vessel for safe processing of cymoxanil hydrochloride according to claim 1, characterized in that: The driving device includes a servo motor (2) and a reducer fixedly connected to the top surface of the pressure tank (11). The output end of the servo motor (2) is fixedly connected to the input end of the reducer, and the output end of the reducer is fixedly connected to the top end of the rotating rod (21).

4. The reaction vessel for safe processing of cymoxanil hydrochloride according to claim 1, characterized in that: The stirring device includes at least two stirring blades (22) fixedly installed on the outer wall of the rotating rod (21). The at least two stirring blades (22) are arranged vertically at intervals along the axial direction of the rotating rod (21), and adjacent stirring blades (22) are perpendicular to each other.

5. The reaction vessel for safe processing of cymoxanil hydrochloride according to claim 1, characterized in that: The exhaust device includes an exhaust pipe (5) fixed to the top of the pressure tank (11), the exhaust pipe (5) is connected to the pressure tank (11), a filter box (52) is fixedly connected to the top of the exhaust pipe (5), a filter plate is fixedly connected inside the filter box (52), and an electric valve (51) is fixedly connected to the outer wall of the exhaust pipe (5).

6. The reaction vessel for safe processing of cymoxanil hydrochloride according to claim 1, characterized in that: The circulation device includes a circulation pump (4) fixed on the outer wall of the vessel body (1). The input end of the circulation pump (4) is connected to the vessel body (1), and the output end of the circulation pump (4) is fixedly connected to a water pipe (41). The other end of the water pipe (41) is connected to the vessel body (1).

7. The reaction vessel for safe processing of cymoxanil hydrochloride according to claim 1, characterized in that: A control unit is provided on one side of the vessel body (1), and the control unit is connected to the electric valve (51), pressure gauge (6) and temperature gauge (7) via electrical signals.

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