Fine chemical synthesis device

Abstract

The utility model relates to the technical field of chemical synthesis, and discloses a fine chemical synthesis device which comprises a fixing frame and a reaction kettle, the reaction kettle is fixedly arranged on the fixing frame, a feeding pipe and a discharging pipe are respectively arranged at the top and the bottom of the reaction kettle, and a stirring mechanism, a shearing assembly and a control system are arranged in the reaction kettle; a stirring shaft is arranged in the reaction kettle, the top of the stirring shaft penetrates through the reaction kettle and is connected with a power motor, and a spiral pressure blade is mounted on the stirring shaft. Compared with the prior art, the device has the advantages that materials are pushed to form efficient circulating flow, and meanwhile, the three layers of shearing arm mechanisms distributed at intervals and the annular shearing gear ring are matched, so that the synergistic effect of stirring and layered shearing is achieved; precise and synchronous adjustment of the distance between the shearing arms and the annular shearing gear ring is realized, and the consistency of the shearing particle size is ensured; the aeration holes of the ventilation pipe are matched with the hollow channel of the stirring shaft, the ventilation grooves of the spiral pressure blades and the micropores, so that gas can be uniformly dispersed into materials along with stirring.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis, in particular to a fine chemical synthesis device. Background Art

[0002] In the fine chemical synthesis process, the mixing uniformity of materials, the shear particle size control accuracy and the mass transfer efficiency directly affect the reaction effect and product quality.

[0003] Existing stirring mechanisms often utilize a single fixed-pitch spiral blade or a straight stirring paddle, which only achieves simple radial or axial agitation of the material and fails to establish an orderly circulation flow. This results in localized retention of material within the reactor and inadequate mixing. Furthermore, shearing components (such as fixed-pitch shear blades and ring gears) are typically independent of the stirring mechanism and lack linkage with the stirring action. This makes it difficult to quickly refresh the material in the shearing zone, causing some material to enter the next reaction stage without sufficient shearing, ultimately resulting in poor reaction uniformity and fluctuating product quality. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing device has poor synergy between stirring and shearing, cumbersome shear particle size adjustment, and low mass transfer efficiency, so as to achieve efficient mixing, precise shearing and sufficient mass transfer in the fine chemical synthesis process.

[0005] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] A fine chemical synthesis device comprises a fixed frame and a reactor. The reactor is mounted and fixed on the fixed frame, and a feed pipe and a discharge pipe are provided at the top and bottom of the reactor respectively. A stirring mechanism, a shearing assembly and a control system are provided in the reactor. A stirring shaft is provided in the reactor, and the top of the stirring shaft passes through the reactor and is connected to a power motor. A spiral pressure blade is installed on the stirring shaft. The spiral pressure blade adopts a variable pitch design in which the pitch gradually increases from the bottom to the top, and is divided into four independent structures along the axial direction of the stirring shaft. The shearing assembly comprises three layers of shear arm mechanisms distributed along the axial direction of the stirring shaft and three layers of annular shear gear rings correspondingly arranged on the inner wall of the reactor. Adjacent layers of the shear arm mechanisms are separated by the spiral pressure blades to form an interval distribution. The shear arm mechanism is provided with a telescopic variable pitch unit, which cooperates with the annular shear gear ring to change the shearing particle size.

[0007] As an improvement, the shear arm mechanism includes a fixed plate located between two adjacent spiral pressure blades and fixed on the stirring shaft. The fixed plate is a cylindrical structure with a hollow interior. Its outer wall is provided with a number of sleeves evenly distributed circumferentially. A connecting column is provided in the sleeve for telescopic sliding. The outer end of the connecting column is hinged to the shear arm through a ball joint bearing, and the other end is connected to the interior of the fixed plate. A telescopic pitch variable unit is provided in the fixed plate to drive the synchronous telescopic movement of several connecting columns.

[0008] As an improvement, the telescopic pitch changing unit includes a gear plate rotatably arranged at the bottom of the fixed plate and several gears engaged with the gear plate, the gears are engaged with the end of the connecting column, a power motor is provided on the top of the fixed plate, and the output shaft of the power motor passes through the fixed plate and is power-connected to one of the gears.

[0009] As an improvement, the discharge pipe is further connected to a gas valve, the inner end of the gas valve is connected to a vent pipe provided at the bottom of the reactor, and a plurality of aeration holes are provided on the vent pipe.

[0010] As an improvement, a hollow channel is provided inside the stirring shaft and is connected to the ventilation pipe at the bottom of the reactor. The bottom end of the stirring shaft is rotatably connected to the ventilation pipe through a bearing. An array of guide grooves are distributed on the surface of the spiral pressure blade, and a ventilation groove connected to the hollow channel is provided inside. The surface of the spiral pressure blade is provided with micropores that pass through from top to bottom and are connected to the ventilation groove.

[0011] As an improvement, the control system includes pressure sensors distributed in the reactor, torque sensors arranged at the roots of the spiral pressure blades, and a controller. The controller adjusts the speed of the power motor and the ventilation volume of the hollow channel according to the pressure and torque data.

[0012] As an improvement, the shear arm is made of elastic alloy material, and a replaceable composite ceramic cutter head is installed at the end. The cutter head corresponds to the cutting teeth of the annular shear gear ring and a gap is left.

[0013] The advantages of this utility model compared with the prior art are:

[0014] 1. This utility model promotes efficient circulation of materials through the variable pitch design of the spiral pressure blade (the pitch gradually increases from bottom to top) and the four-section independent structure. At the same time, the three-layer spaced shear arm mechanism and the annular shear gear ring are combined to achieve the synergistic effect of stirring and layered shearing, solving the problems of poor stirring and shearing synergy and uneven material mixing in traditional devices, and improving the reaction uniformity.

[0015] 2. The telescopic variable pitch unit of the utility model drives multiple connecting columns to extend and retract synchronously through the linkage transmission of the toothed disc and gear, realizing precise and synchronous adjustment of the distance between the shearing arm and the annular shearing gear ring, ensuring the consistency of the sheared particle size. It overcomes the defects of the traditional adjustment mechanism of step-by-step operation and insufficient positioning accuracy, and adapts to the shearing requirements of different materials.

[0016] 3. The utility model cooperates the aeration holes of the vent pipe with the hollow channels of the stirring shaft, the vent grooves and micropores of the spiral pressure blades, so that the gas can be evenly dispersed into the material during stirring, greatly increasing the gas-liquid or gas-solid contact area, significantly improving the mass transfer efficiency, and solving the problems of uneven gas distribution and low mass transfer efficiency in traditional devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the appearance of the utility model.

[0018] Figure 2 It is an explosion diagram of the utility model.

[0019] Figure 3 This is a partial structural section of the utility model Figure 1 .

[0020] Figure 4 This is a partial structural section of the utility model Figure 2 .

[0021] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure at point A.

[0022] Figure 6 It is a schematic diagram of the appearance of some components of the utility model.

[0023] Figure 7 It is a cross-sectional view of the present utility model.

[0024] Figure 8 This utility model Figure 7 Enlarged schematic diagram of the structure at point B.

[0025] Figure 9 This is a partial structural section of the utility model Figure 3 .

[0026] Figure 10 This utility model Figure 9 Enlarged schematic diagram of the structure at C.

[0027] As shown in the figure: 1. Fixed frame; 2. Reactor; 21. Feed pipe; 22. Discharge pipe; 3. Stirring shaft; 31. Hollow channel; 4. Spiral pressure blade; 41. Guide groove; 42. Vent groove; 43. Micropore; 5. Shear arm mechanism; 51. Fixed plate; 52. Sleeve; 53. Connecting column; 54. Shear arm; 541. Cutting head; 6. Annular shear gear ring; 7. Telescopic pitch unit; 71. Toothed disc; 72. Gear; 73. Power motor; 8. Gas valve; 9. Vent pipe; 10. Aeration hole. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings.

[0029] Please see the attached Figure 1 , Attachment Figure 2 and attached Figure 3As shown, a fine chemical synthesis device includes a fixed frame 1 and a reactor 2. The reactor 2 is fixedly installed on the fixed frame 1. A feed pipe 21 is provided at the top of the reactor 2 for inputting reaction materials, and a discharge pipe 22 is provided at the bottom for discharging reaction products. A stirring mechanism, a shearing component and a control system are provided in the reactor 2. The stirring mechanism is used to promote the circulation of materials, the shearing component is used to shear and refine the materials, and the control system is used to adjust the reaction parameters.

[0030] The stirring mechanism includes a stirring shaft 3 vertically arranged in the reactor 2. The top of the stirring shaft 3 passes through the top of the reactor 2 through a sealed bearing and is connected to the power motor on the top of the reactor 2. The power motor drives the stirring shaft 3 to rotate; a spiral pressure blade 4 is fixedly installed on the stirring shaft 3. The spiral pressure blade 4 adopts a variable pitch design in which the pitch gradually increases from the bottom to the top, and is divided into four independent structures along the axial direction of the stirring shaft 3. The variable pitch design can promote the gradual dispersion of materials as they flow from the bottom to the top, thereby improving the mixing effect.

[0031] The shearing assembly includes a three-layer shearing arm mechanism 5 distributed axially along the stirring shaft 3 and a three-layer annular shearing gear ring 6 fixed on the inner wall of the reactor 2. The annular shearing gear ring 6 corresponds to the shearing arm mechanism 5 one by one. The adjacent two layers of shearing arm mechanisms 5 are separated by a section of spiral pressure blades 4 to form spaced shearing areas to achieve layered shearing of materials of different heights.

[0032] Please see the attached Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 9 and attached Figure 10 As shown, the shear arm mechanism 5 includes a fixed plate 51 fixed on the stirring shaft 3, and the fixed plate 51 is located between two adjacent sections of spiral pressure blades 4, and is a hollow cylindrical structure inside; a number of sleeves 52 are evenly distributed circumferentially on the outer wall of the fixed plate 51, and the sleeves 52 are connected to the inside of the fixed plate 51; a connecting column 53 is provided in the sleeve 52 for telescopic sliding, and the outer end of the connecting column 53 is hinged to the shear arm 54 through a ball hinge bearing, and the ball hinge bearing can make the shear arm 54 adapt to the flow of materials and produce a small swing, thereby improving the shearing flexibility; the inner end of the connecting column 53 extends into the interior of the fixed plate 51, and a telescopic variable pitch unit 7 is provided in the fixed plate 51, which is used to drive the synchronous telescopic movement of the number of connecting columns 53, thereby adjusting the distance between the shear arm 54 and the annular shear gear ring 6.

[0033] The telescopic pitch-changing unit 7 includes a toothed disc 71 rotatably arranged at the bottom of the fixed disc 51 through a bearing, and a plurality of gears 72 are meshed above the toothed disc 71. The gear 72 is rotatably arranged in the fixed disc 51 through a shaft seat and is meshed and connected with the end of the connecting column 53 (the end of the connecting column 53 is provided with a rack structure); a power motor 73 is fixedly provided on the top of the fixed disc 51, and the output shaft of the power motor 73 passes through the top of the fixed disc 51 and is power-connected to one of the gears 72 through a coupling; the power motor 73 drives the gear 72 connected thereto to rotate, and the gear 72 drives the toothed disc 71 to rotate, and the toothed disc 71 synchronously drives the other gears 72 to rotate. When the gear 72 rotates, the connecting column 53 is driven to telescope along the sleeve 52 through meshing transmission, thereby realizing the synchronous adjustment of the distance between the shear arm 54 and the annular shear gear ring 6.

[0034] Please see the attached Figure 2 , Attachment Figure 3 , Attachment Figure 7 and attached Figure 8 As shown, the side of the discharge pipe 22 is connected to a gas valve 8, which is used to connect to an external gas source (such as the gas required for the reaction or an inert gas); the inner end of the gas valve 8 is connected to a ring-shaped vent pipe 9, which extends to the bottom of the reactor 2 and is provided with a plurality of aeration holes 10 in the ring. The gas enters the bottom of the reactor 2 through the aeration holes 10, promotes the turbulence of the bottom material, and improves the mixing effect.

[0035] The agitator shaft 3 is internally provided with a hollow channel 31, the bottom of which is connected to the vent pipe 9 via a rotary joint (ensuring that the rotation of the agitator shaft 3 does not affect ventilation). The surface of the spiral pressure blade 4 is distributed with an array of guide grooves 41 to guide the flow of the material. The spiral pressure blade 4 is internally provided with a vent groove 42, which is connected to the hollow channel 31. Micropores 43 extending vertically through the surface of the spiral pressure blade 4 are also provided, which are connected to the vent groove 42. Gas from the vent pipe 9 can be discharged through the hollow channel 31 and the vent grooves 42 and then discharged through the micropores 43. As the spiral pressure blade 4 rotates, it is evenly dispersed into the material, significantly improving the gas-liquid or gas-solid mass transfer efficiency.

[0036] The control system includes pressure sensors distributed on the inner wall of the reactor 2 (for monitoring the reaction pressure), a torque sensor located at the root of the spiral pressure blade 4 (for monitoring the stirring resistance and reflecting the viscosity of the material), and a controller electrically connected to each sensor, the power motor, the power motor 73, and the air valve 8. The controller adjusts the reaction pressure based on the pressure sensor data, and adjusts the power motor speed (increasing the speed as needed to enhance stirring when the viscosity is high) and the opening of the air valve 8 (adjusting the ventilation volume of the hollow channel 31) based on the torque sensor data to ensure stable reaction.

[0037] The shear arm 54 is made of elastic alloy material and has a certain elastic deformation ability, which can reduce damage when colliding with hard impurities; the end of the shear arm 54 is installed with a replaceable composite ceramic cutter head 541 by bolts. The composite ceramic cutter head 541 has high hardness and wear resistance, and the cutter head 541 corresponds to the cutting teeth of the annular shear gear ring 6 and leaves a gap. The size of the gap is adjusted by the telescopic pitch unit 7 to achieve control of different shear particle sizes; when the cutter head 541 is worn, it can be replaced separately to reduce maintenance costs.

[0038] During the specific implementation of the present invention: according to the reaction requirements, the initial gap between the shear arm 54 and the annular shear gear ring 6 (i.e., the spacing corresponding to the target shearing particle size) is adjusted by the telescopic variable pitch unit 7; the power motor is turned on, and the stirring shaft 3 drives the spiral pressure blade 4 and the shear arm mechanism 5 to rotate. The spiral pressure blade 4 promotes the material to flow upward from the bottom due to the variable pitch design, so that the material forms a circulating flow in the reactor 2; when the material flows through the shear arm mechanism 5, it is sheared and refined under the relative movement of the shear arm 54 and the annular shear gear ring 6, and the three-layer shear structure realizes multi-stage shearing, thereby improving the refinement effect.

[0039] During the reaction process, gas is introduced into the vent pipe 9 through the gas supply valve 8. Part of the gas enters the bottom of the reactor from the aeration hole 10, and the other part is discharged from the micropores 43 through the hollow channel 31 and the ventilation groove 42. As the spiral pressure blade 4 rotates, it is evenly dispersed into the material to promote mass transfer; the pressure sensor and torque sensor of the control system monitor the reaction parameters in real time, and the controller automatically adjusts the power motor speed and ventilation volume according to the data to ensure stable reaction conditions.

[0040] If the shear particle size needs to be adjusted, the power motor 73 is started, and the telescopic variable pitch unit 7 drives the shear arm 54 to synchronously extend and retract, thereby changing the gap with the annular shear gear ring 6. After the reaction is completed, the power motor and gas valve 8 are turned off, and the product is discharged through the discharge pipe 22. Cleaning fluid can be regularly introduced through the feed pipe 21, or the inspection port on the top of the reactor 2 can be opened to clean and maintain the internal structure.

[0041] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without creatively designing a structure and embodiment similar to the technical solution, they shall fall within the scope of protection of the present invention.

Claims

1. A fine chemical synthesis device, comprising a fixed frame (1), a reaction kettle (2) mounted on the fixed frame (1), a feed pipe (21) and a discharge pipe (22) being provided at the top and bottom of the reaction kettle (2), a stirring mechanism, a shearing component and a control system being provided therein, characterized in that: The reactor (2) is provided with a stirring shaft (3), the top of the stirring shaft (3) passes through the reactor (2) and is connected to the power motor, and a spiral pressure blade (4) is installed on the stirring shaft (3). The spiral pressure blade (4) adopts a variable pitch design in which the pitch gradually increases from the bottom to the top, and is divided into four independent structures along the axial direction of the stirring shaft (3); The shearing assembly comprises three layers of shearing arm mechanisms (5) distributed axially along the stirring shaft (3) and three layers of annular shearing gear rings (6) correspondingly arranged on the inner wall of the reactor (2), with adjacent layers of shearing arm mechanisms (5) separated by spiral pressure blades (4) to form an interval distribution; The shear arm mechanism (5) is provided with a telescopic variable distance unit (7) which cooperates with the annular shearing gear ring (6) to change the shearing particle diameter.

2. A fine chemical synthesis device according to claim 1, characterized in that: The shear arm mechanism (5) comprises a fixed disk (51) located between two adjacent sections of spiral pressure blades (4) and fixed on the stirring shaft (3). The fixed disk (51) is a hollow cylindrical structure. A plurality of sleeves (52) uniformly distributed circumferentially are provided on its outer wall. A connecting column (53) is provided in the sleeve (52) for telescopic sliding. The outer end of the connecting column (53) is hinged to the shear arm (54) through a ball joint bearing, and the other end is connected to the interior of the fixed disk (51). A telescopic variable pitch unit (7) is provided in the fixed disk (51) to drive the plurality of connecting columns (53) to move synchronously.

3. A fine chemical synthesis device according to claim 2, characterized in that: The telescopic pitch changing unit (7) comprises a toothed disc (71) rotatably arranged at the bottom of the fixed disc (51) and a plurality of gears (72) meshing with the toothed disc (71). The gears (72) are meshingly connected with the ends of the connecting columns (53). A power motor (73) is provided at the top of the fixed disc (51). The output shaft of the power motor (73) passes through the fixed disc (51) and is power-connected to one of the gears (72).

4. A fine chemical synthesis device according to claim 1, characterized in that: The discharge pipe (22) is also connected to a gas delivery valve (8), the inner end of which is connected to a ring-shaped vent pipe (9) provided at the bottom of the reactor, and a plurality of aeration holes (10) are provided on the vent pipe (9).

5. A fine chemical synthesis device according to claim 4, characterized in that: A hollow channel (31) is provided inside the stirring shaft (3) and is connected to the ventilation pipe (9) at the bottom end of the reactor (2). The bottom end of the stirring shaft (3) is rotatably connected to the ventilation pipe (9) via a bearing. An array of guide grooves (41) are distributed on the surface of the spiral pressure blade (4), and a ventilation groove (42) connected to the hollow channel (31) is provided inside. Micropores (43) are provided on the surface of the spiral pressure blade (4) and are connected to the ventilation groove (42) through the upper and lower parts.

6. A fine chemical synthesis device according to claim 2, characterized in that: The control system includes pressure sensors distributed in the reactor (2), a torque sensor arranged at the root of the spiral pressure blade (4), and a controller. The controller adjusts the speed of the power motor and the ventilation volume of the hollow channel (31) according to pressure and torque data.

7. A fine chemical synthesis device according to claim 2, characterized in that: The shear arm (54) is made of elastic alloy material, and a replaceable composite ceramic cutter head (541) is installed at the end. The cutter head (541) corresponds to the cutting teeth of the annular shear gear ring (6) and a gap is left.

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