A reaction vessel for automatic feeding of chemical powders

Abstract

This invention relates to the field of reactor technology and discloses a reactor for automatic feeding of chemical powders, comprising: a reactor body and a feeding mechanism; a feed cylinder is provided at the top of the reactor body, and a valve body is provided on the feed cylinder; the feeding mechanism is located on one side of the reactor body and includes a support part, a feed part hinged to the support part, a feeding part connected to the feed part, and a control part. The feeding mechanism of this invention, by real-time sensing of the particle characteristics of the material, achieves adaptive and coordinated adjustment of the feeding angle and conveying speed according to the powder type to match the optimal feeding method; dynamically matching the optimal angle and speed according to the particle size can eliminate fine powder caking and coarse particle rollback, thereby improving powder residue problems; combining particle size characteristics to precisely control the power output and introducing a real-time feedback mechanism can improve conveying smoothness and reduce fluctuations in conveying efficiency.

Description

Technical Field

[0001] This invention relates to the field of reaction vessel technology, and more specifically, to a reaction vessel for automatic feeding of chemical powders. Background Technology

[0002] As a key piece of equipment in chemical and pharmaceutical industries, the material feeding efficiency of reaction vessels directly affects production efficiency. Currently, the main methods for feeding powder materials into reaction vessels include manual feeding or simple mechanical conveying mechanisms. Manual feeding relies on operators to handle and pour materials, which is inefficient, prone to introducing pollution risks, and cumbersome to operate. While mechanical feeding mechanisms (such as screw conveyors and vacuum suction devices) can achieve basic automation, their core parameters such as inclination angle and rotation speed are usually fixed and preset, and cannot be dynamically adjusted according to the characteristics of the materials.

[0003] However, in actual production processes, the physical properties of the chemical powders used are highly variable. Traditional reaction vessels, due to their inability to dynamically adjust the feeding process according to the material characteristics, are prone to the following problems:

[0004] First, fine powder tends to adhere to the pipe wall when conveyed at low angles, while coarse particles accumulate at the end of the auger due to gravity rolling back at high angles, leading to increased residue rates. This not only makes subsequent cleaning inconvenient but also affects the accuracy of subsequent raw material additions. Second, a fixed rotation speed cannot match the critical suspension velocity of materials with different particle sizes. Excessive speed scattering of fine powder and slow accumulation of coarse particles will result in large fluctuations in conveying efficiency. Third, when switching materials on the same equipment, manual adjustment by stopping the machine is required, interrupting production continuity and lacking adaptability.

[0005] Therefore, there is an urgent need for a reaction vessel that can automatically adjust the parameters of the feeding mechanism according to the characteristics of chemical powders in order to achieve efficient, low-residue, and continuous production. Summary of the Invention

[0006] The purpose of this invention is to provide a reaction vessel for automatic feeding of chemical powders to solve the aforementioned technical problems.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0008] This invention provides a reaction vessel for automatic feeding of chemical powders, comprising: a reaction vessel body and a feeding mechanism;

[0009] The reactor body is equipped with a feed cylinder at the top, and a valve body is provided on the feed cylinder;

[0010] The feeding mechanism is located on one side of the reactor body and includes a support part, a feeding part hinged to the support part, a feeding part connected to the feeding part, and a control part.

[0011] The support is provided with an angle adjustment drive source for driving the feeding part to rotate around the hinge point;

[0012] The feeding section is equipped with a material characteristic detection device for detecting the particle size information and material conveying amount of the material to be conveyed.

[0013] The discharge end of the feeding section is connected to the feed cylinder through a retractable pipe;

[0014] The control unit is connected to the material characteristic detection device, valve body, angle adjustment drive source and feeding unit via signal connection.

[0015] The control unit is configured to perform the following operations:

[0016] S100: Receive particle size information of the current batch of materials collected by the material characteristic detection device;

[0017] S200. Determine the particle size class of the current material according to the preset particle size classification rules.

[0018] S300: Based on the determined particle size grade, query the preset corresponding relationship database to obtain the tilt angle and feeding speed of the preset target that matches the grade.

[0019] S400: Generate the first control signal to control the angle adjustment drive source to drive the feeding part and the feeding part to rotate as a whole to the preset target tilt angle.

[0020] S500: Generate a second control signal to control the feeding unit to run at a preset target feeding speed;

[0021] S600: After confirming that the material conveying is completed or the preset feed amount has been reached, a third control signal is generated to control the valve body to close.

[0022] Preferably, the feeding section includes a feeding cylinder communicating with the feeding section, a drive motor fixed on the feeding cylinder, and an auger rotating inside the feeding cylinder, wherein the rotating end of the drive motor is connected to the auger.

[0023] Preferably, the feeding part is provided with a feeding assembly, the feeding assembly including a guide bucket fixed on the support part, and the guide bucket and the feeding part are connected by a retractable connecting body.

[0024] Preferably, the angle adjustment drive source is a motor transmission mechanism, the rotating end of which is connected to the hinged end of the feeding part; in step S400, the control unit drives the angle adjustment by controlling and adjusting the rotation stroke of the motor.

[0025] Preferably, the material characteristic detection device includes a laser particle size analyzer, a visual recognition sensor, and a weighing sensor, used to collect material particle size distribution data and material conveying volume in real time.

[0026] Preferably, the preset correspondence database in step S300 is a lookup table, which stores the mapping relationship between different particle size grades and preset target tilt angle and preset target auger rotation speed.

[0027] Preferably, the control unit determines the parameters in step S300 in the following manner:

[0028] The particle size information is input into a pre-trained angle-rotation matching model, and the model outputs the preset target tilt angle and the preset target auger rotation speed.

[0029] Preferably, the drive motor is a variable frequency motor; in step S500, the control unit adjusts the output frequency of the frequency converter to achieve the preset target auger speed.

[0030] Preferably, confirming the completion of material conveying in step S600 includes:

[0031] It receives the weighing sensor signal located in the feeding section, and determines that the conveying is completed when the weight change rate is ≤0.5% / s;

[0032] Alternatively, it can receive a level gauge signal located inside the reactor body, and determine that the conveying is complete when the material level reaches a preset height.

[0033] Preferably, the particle size grades include at least:

[0034] Fine powder grade (D50 < 100μm): corresponding to an inclination angle of 30-40° and a screw conveyor speed of 100-150rpm;

[0035] Particle size (100μm≤D50<500μm): corresponding tilt angle 40-50°, auger speed 80-120rpm;

[0036] Coarse-grained grade (D50≥500μm): corresponding to an inclination angle of 50-60° and a screw conveyor speed of 50-80rpm.

[0037] The beneficial effects of this invention are as follows:

[0038] The feeding mechanism of this invention, by sensing the characteristics of material particles in real time, achieves adaptive and coordinated adjustment of the feeding angle and conveying speed according to the type of powder to match the optimal feeding method; dynamically matching the optimal angle and speed according to particle size can eliminate fine powder caking and coarse particle rollback, thereby improving the powder residue problem; combining particle size characteristics to precisely control power output and introduce a real-time feedback mechanism can improve conveying smoothness and reduce the fluctuation of conveying efficiency; its automatic parameter adjustment function can reduce the number of traditional shutdowns for debugging and improve the adaptability to material switching. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a reaction vessel for automatic feeding of chemical powders provided by the present invention;

[0040] Figure 2 This is a schematic diagram of the front view of a reaction vessel for automatic feeding of chemical powders provided by the present invention;

[0041] Figure 3 This is a schematic diagram of the feeding mechanism in a reaction vessel for automatic feeding of chemical powders provided by the present invention;

[0042] Figure 4 This invention provides a flowchart of the command execution process of the control unit in a reaction vessel for automatic feeding of chemical powders.

[0043] Figure 5 This invention provides a hardware architecture diagram of the feeding mechanism in a reaction vessel for automatic feeding of chemical powders.

[0044] In the diagram: 10. Reactor body; 101. Feed cylinder; 102. Valve body; 103. Telescopic pipe; 20. Feeding mechanism; 201. Stainless steel frame; 202. Feed hopper; 203. Motor drive mechanism; 204. Guide hopper; 205. Connecting body; 206. Feeding cylinder; 207. Drive motor; 208. Screwdriver; 209. Laser particle size analyzer; 210. Visual recognition sensor; 211. Weighing sensor. Detailed Implementation

[0045] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0046] Please refer to the following: Figure 1 , Figure 2 and Figure 5A reaction vessel for automatic feeding of chemical powders includes a reaction vessel body 10 and a feeding mechanism 20. A feed cylinder 101 is located at the top of the reaction vessel body 10, and a valve body 102 is mounted on the feed cylinder 101. The valve body 102 can be a solenoid valve, mainly used to control the opening and closing of the feed cylinder 101; it is open during the feeding stage and closed during the reaction stage. The feeding mechanism 20 is located on one side of the reaction vessel body 10 and includes a support part, a feed part hinged to the support part, a feeding section connected to the feed part, a material characteristic detection element mounted on the feed part, and a control part. The control part is signal-connected to the material characteristic detection element, the valve body 102, the angle adjustment drive source, and the feeding section.

[0047] The support section can be a stainless steel frame 201 adapted to the feeding section, located on one side of the reactor body 10, mainly providing stable support for the feeding section. The support section is equipped with an angle adjustment drive source for driving the feeding section to rotate around the hinge point. This angle adjustment drive source can be a motor transmission mechanism 203, a hydraulic cylinder, or an electric push rod. In this invention, the motor transmission mechanism 203 is preferred, which includes a motor, a worm gear, and a worm. The motor is fixedly mounted on the top of the support section, the worm is connected to the rotating end of the motor, and the worm gear is fixed to the hinge end of the feeding section, meshing with the worm. This motor transmission mechanism 203, utilizing the transmission cooperation of the worm gear and worm, offers better stability and higher adjustment accuracy compared to other drive mechanisms. Furthermore, it has self-locking capability, resulting in higher safety.

[0048] Please refer to the following: Figures 2 to 3 The feeding section is a conical feeding hopper 202, with both its front and rear sides hinged to the top of the support section via rotating shafts. A feeding assembly is also provided at the opening at the top of the feeding hopper 202.

[0049] In addition, the feeding assembly includes a conical guide hopper 204 fixed to the support. The top of the guide hopper 204 is inclined at 20-30 degrees to facilitate material feeding by operators. The guide hopper 204 and the feeding hopper 202 are connected by a retractable connecting body 205. This connecting body 205 can be a short, dense fluororubber tube. When the inclination angle of the feeding hopper 202 changes, the connecting body 205 can adapt to the change in the angle of the feeding hopper 202 to ensure effective communication between the guide hopper 204 and the feeding hopper 202. By adding this feeding assembly, the angle of the feeding port can be kept constant, avoiding the problem of increased difficulty for operators in feeding materials due to changes in the angle of the feeding port at the top of the feeding hopper 202.

[0050] Furthermore, the feeding unit includes a feeding cylinder 206 connected to the infeed unit, a drive motor 207 fixed on the feeding cylinder 206, and an auger 208 rotating inside the feeding cylinder 206. The drive motor 207 is a variable frequency motor, fixed to the top of the feeding cylinder 206, and its rotating end is fixedly connected to the end of the auger 208. The control unit adjusts the output frequency of the frequency converter to achieve the preset target rotation speed of the auger 208. The discharge end of the feeding cylinder 206 is connected to the infeed cylinder 101 through a telescopic pipe 103, which is a corrugated stainless steel flexible hose to ensure a sealed connection during tilt angle adjustment.

[0051] The material characteristic detection device is used to detect the particle size information and material conveying volume of the material to be conveyed. It includes a laser particle size analyzer 209, a vision recognition sensor 210, and a weighing sensor 211, used to collect particle size distribution data of the material in real time. The laser particle size analyzer 209 and the vision recognition sensor 210 are both installed on the upper part of the inner wall of the feed hopper 202, while the weighing sensor 211 is installed at the bottom of the feed hopper 202. The laser particle size analyzer 209 can be a Malvern Mastersizer 3000 with a scanning frequency of 10Hz, and the vision recognition sensor 210 is an industrial camera with a resolution of 1280×1024, capable of capturing the material flow pattern. The control unit takes the weighted average of the two data (weight 7:3) as the particle size information to ensure recognition accuracy.

[0052] Regarding the control unit, a conventional processor can be used, such as an ARM Cortex-A9 dual-core processor (1.2GHz), which is integrated into the control module of the reactor.

[0053] Please refer to the following: Figures 2 to 4 When performing the feeding operation of this invention, the operator first adds a small amount of powder from the top of the guide hopper 204. During the process of the powder entering the feed hopper 202, the information of the powder is collected by the material characteristic detection device and transmitted to the control unit. Then the control unit begins to perform the following operations:

[0054] S100: Receive particle size information of the current batch of materials collected by the material characteristic detection device.

[0055] S200. Determine the particle size class of the current material according to the preset particle size classification rules. The particle size class is classified according to the median diameter (D50) of the particle size distribution, and D50 is a common industry indicator.

[0056] S300: Based on the determined particle size grade, query the preset correspondence database to obtain the tilt angle and feeding speed of the preset target that matches the grade.

[0057] When determining the particle size level, the specific operation is as follows: input the particle size information into the pre-trained angle-rotation matching model, and the model outputs the preset target tilt angle and the preset target auger rotation speed.

[0058] The default mapping database is a lookup table (LUT), which stores the mapping relationship between different particle size levels and the default target tilt angle and the default target auger rotation speed.

[0059] The lookup table (LUT) is as follows:

[0060]

[0061] S400: Generate a first control signal to control the angle adjustment drive source to rotate the feeding part and the conveying part as a whole to the preset target tilt angle.

[0062] The preset target tilt angle execution process is as follows: the motor transmission mechanism 203 receives the first control signal and starts to drive the feed hopper 202 to rotate. After rotating to the preset tilt angle, the drive stops. During this adjustment process, since the guide bucket 204 does not follow the movement of the feed hopper 202, the staff can add powder normally without affecting the feeding process.

[0063] S500: Generate a second control signal to control the feeding unit to run at a preset target feeding speed.

[0064] The preset target feeding speed execution process is as follows: the drive motor 207 receives the second control signal and adjusts the output frequency of the frequency converter to change the speed of the drive motor 207, thereby realizing the preset target auger speed adjustment.

[0065] S600: After confirming that the material conveying is completed or the preset feed amount has been reached, a third control signal is generated to control the valve body 102 to close.

[0066] Confirming the completion of material conveying includes: receiving a signal from the weighing sensor 211 located at the feeding section, and determining that the conveying is complete when the weight change rate is ≤0.5% / s;

[0067] Alternatively, it can receive a level gauge signal located inside the reactor body 10, and determine that the conveying is complete when the material level reaches a preset height.

[0068] It should be added that the training dataset for the angle-rotation speed matching model set in this invention is specifically as follows:

[0069] 1.1 Dataset Structure

[0070]

[0071] 1.2 Model Training and Validation

[0072] Input layer: [D50, Angle of repose, Coefficient of friction, Humidity] (normalized)

[0073] Output layer: [Tilt angle, Rotation speed]

[0074] Training results:

[0075] Python

[0076] # Neural Network Architecture (TensorFlow Implementation)

[0077] model = Sequential([

[0078] Dense(64, activation='relu', input_shape=(4,)),

[0079] Dense(32, activation='relu'),

[0080] Dense(2) # Output tilt angle + speed ])

[0082] # Performance metrics

[0083] MSE = 0.018 (tilt error ±1.2°)

[0084] MAE = 2.7 rpm (speed error ±3%)

[0085] Typical prediction case:

[0086]

[0087] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A reaction vessel for automatic feeding of chemical powders, characterized in that, include: The main body of the reactor and the feeding mechanism; The reactor body is equipped with a feed cylinder at the top, and a valve body is provided on the feed cylinder; The feeding mechanism is located on one side of the reactor body and includes a support part, a feeding part hinged to the support part, a feeding part connected to the feeding part, and a control part. The support is provided with an angle adjustment drive source for driving the feeding part to rotate around the hinge point; The feeding section is equipped with a material characteristic detection device for detecting the particle size information and material conveying amount of the material to be conveyed. The discharge end of the feeding section is connected to the feed cylinder through a retractable pipe; The control unit is connected to the material characteristic detection device, valve body, angle adjustment drive source and feeding unit via signal connection. The control unit is configured to perform the following operations: S100: Receive particle size information of the current batch of materials collected by the material characteristic detection device; S200. Determine the particle size class of the current material according to the preset particle size classification rules. S300: Based on the determined particle size grade, query the preset corresponding relationship database to obtain the tilt angle and feeding speed of the preset target that matches the grade. S400: Generate the first control signal to control the angle adjustment drive source to drive the feeding part and the feeding part to rotate as a whole to the preset target tilt angle. S500: Generate a second control signal to control the feeding unit to run at a preset target feeding speed; S600: After confirming that the material conveying is completed or the preset feed amount has been reached, a third control signal is generated to control the valve body to close. In step S300, the control unit determines the parameters in the following manner: The particle size information is input into a pre-trained angle-rotation matching model, and the model outputs the preset target tilt angle and the preset target auger rotation speed. The particle size grades include at least: Fine powder grade D50 < 100μm: corresponding to an inclination angle of 30-40° and a screw conveyor speed of 100-150rpm; Particle size 100μm≤D50<500μm: corresponding tilt angle 40-50°, auger speed 80-120rpm; Coarse-grained D50≥500μm: corresponding to an inclination angle of 50-60° and a screw conveyor speed of 50-80rpm.

2. The reaction vessel for automatic feeding of chemical powders according to claim 1, characterized in that, The feeding section includes a feeding cylinder connected to the feeding section, a drive motor fixed on the feeding cylinder, and an auger rotating inside the feeding cylinder. The rotating end of the drive motor is connected to the auger.

3. A reaction vessel for automatic feeding of chemical powders according to claim 1, characterized in that, The feeding section is provided with a feeding assembly, which includes a guide bucket fixed on the support section. The guide bucket is connected to the feeding section through a retractable connecting body.

4. A reaction vessel for automatic feeding of chemical powders according to claim 1, characterized in that, The angle adjustment drive source is a motor transmission mechanism, whose rotating end is connected to the hinged end of the feeding part; in step S400, the control unit drives the angle adjustment by controlling and adjusting the rotation stroke of the motor.

5. A reaction vessel for automatic feeding of chemical powders according to claim 1, characterized in that, The material characteristic detection device includes a laser particle size analyzer, a visual recognition sensor, and a weighing sensor, which are used to collect material particle size distribution data and material conveying volume in real time.

6. A reaction vessel for automatic feeding of chemical powders according to claim 1, characterized in that, The preset correspondence database in step S300 is a lookup table, which stores the mapping relationship between different particle size grades and preset target tilt angle and preset target auger rotation speed.

7. A reaction vessel for automatic feeding of chemical powders according to claim 2, characterized in that, The drive motor is a variable frequency motor; in step S500, the control unit adjusts the output frequency of the frequency converter to achieve the preset target auger speed.

8. A reaction vessel for automatic feeding of chemical powders according to claim 1, characterized in that, The step S600, which confirms the completion of material conveying, includes: It receives the weighing sensor signal located in the feeding section, and determines that the conveying is completed when the weight change rate is ≤0.5% / s; Alternatively, it can receive a level gauge signal located inside the reactor body, and determine that the conveying is complete when the material level reaches a preset height.

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