Material dissolution reaction monitoring method, monitoring device and material dissolution reaction system

Abstract

The invention belongs to the technical field of industrial control, and discloses a material dissolution reaction monitoring method and device and a material dissolution reaction system.The material dissolution reaction monitoring method comprises the steps that based on a reaction equation, the first gas mass of gas generated by dissolution reaction is calculated according to the mass of all materials; the environment in the dissolving tank reaches the target environment; in the dissolution reaction, when preset conditions are met, the vacuum degree in the dissolution tank is made to be the same as the vacuum degree in the dissolution tank before the dissolution reaction, the difference between the first mass before the dissolution reaction and the second mass in the dissolution reaction is calculated, and the second gas mass is obtained; the first mass and the second mass are the sum of the mass of the dissolving tank, the mass of the first reaction material and the mass of the second reaction material, when the difference value between the first gas mass and the second gas mass is smaller than or equal to a preset threshold value, it is judged that the dissolving reaction is completed, and otherwise, it is judged that the dissolving reaction is not completed. Whether the dissolution reaction is complete or not can be effectively judged.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial control, and particularly relates to a method for monitoring a material dissolution reaction, a monitoring device, and a material dissolution reaction system. Background Art

[0002] During chemical engineering and pharmaceutical production, in the process of chemical reactions and material dissolution, it is a key issue to detect the reaction progress in real time and determine whether the reaction is complete. If the reaction progress cannot be known in time, it will lead to inaccurate production plan arrangements; moreover, if the gas generated by the dissolution reaction cannot be discharged in time, the pressure inside the dissolution tank will increase, posing a risk of gas leakage by bursting the sealing structure, threatening the safety of personnel and equipment.

[0003] Currently, it is only possible to judge whether the dissolution reaction is complete through experience or intermittent sampling, which is time-consuming and inaccurate, and both the real-time performance and automation degree need to be improved, making it difficult to meet the requirements of high-efficiency and precise control of the reaction process in industrial production. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for monitoring a material dissolution reaction, a monitoring device, and a material dissolution reaction system, which can effectively judge whether the dissolution reaction is complete, ensure equipment safety, and meet the requirements of high-efficiency and precise control of the reaction process in industrial production.

[0005] The first aspect of the present invention discloses a method for monitoring a material dissolution reaction, including: Based on the reaction equation, calculate the first gas mass of the gas generated by the dissolution reaction according to the mass of all materials; Make the environment inside the dissolution tank reach the target environment; During the dissolution reaction, when the preset conditions are met, make the vacuum degree inside the dissolution tank the same as the vacuum degree inside the dissolution tank before the dissolution reaction, calculate the difference between the first mass before the dissolution reaction and the second mass during the dissolution reaction to obtain the second gas mass, where the first mass and the second mass are the sum of the masses of the dissolution tank, the first reaction material, and the second reaction material. When the difference between the first gas mass and the second gas mass is less than or equal to the preset threshold, it is determined that the dissolution reaction is complete; otherwise, it is determined that the dissolution reaction is not complete.

[0006] In some embodiments, the material includes a first reaction material and a second reaction material. After making the environment inside the dissolution tank reach the target environment, it further includes: Put the first reaction material into the dissolution tank, put the second reaction material into the feed tank installed on the dissolution tank and connected to the dissolution tank through a pipeline, evacuate the dissolution tank to make the vacuum degree inside the dissolution tank reach the first preset value, weigh the dissolution tank to obtain the first mass, put the second reaction material from the feed tank into the dissolution tank, and start the dissolution reaction; The vacuum degree in the dissolution tank is made the same as the vacuum degree in the dissolution tank before the dissolution reaction, and the difference between the first mass before the dissolution reaction and the second mass during the dissolution reaction is calculated to obtain the second gas mass, including: The dissolution tank is evacuated to make the vacuum degree in the dissolution tank reach a first preset value, and the dissolution tank is weighed to obtain the second mass, and the difference between the first mass and the second mass is calculated to obtain the second gas mass.

[0007] In some embodiments, during the dissolution reaction, the vacuum degree in the dissolution tank is detected to obtain an actual measured value, and when the actual measured value is less than or equal to a second preset value, it is determined that the preset conditions are met.

[0008] In some embodiments, making the environment in the dissolution tank reach the target environment includes: The dissolution tank is evacuated, and the water and air in the dissolution tank are replaced with inert gas.

[0009] A second aspect of the present invention discloses a monitoring device for material dissolution reaction, including a memory storing executable program codes and a processor coupled to the memory; the processor calls the executable program codes stored in the memory to execute any one of the above-mentioned material dissolution reaction monitoring methods.

[0010] A third aspect of the present invention discloses a material dissolution reaction system, including: a vacuum pump, a dissolution tank, a weighing sensor, and a control device. The vacuum pump is connected to the dissolution tank through a pipeline, and the control device is electrically connected to the vacuum pump and the weighing sensor. The vacuum pump is used to evacuate the dissolution tank, the dissolution tank is used to carry out the material dissolution reaction, the weighing sensor is used to weigh the dissolution tank, and the control device executes any one of the above-mentioned material dissolution reaction monitoring methods.

[0011] In some embodiments, it further includes a vacuum degree sensor, which is used to detect the vacuum degree in the dissolution tank during the dissolution reaction to obtain an actual measured value and transmit the actual measured value to the control device.

[0012] In some embodiments, a stirring shaft is provided in the dissolution tank, and a motor and a first gear drivingly connected to the motor are also provided. The first gear and the stirring shaft are connected through a first magnetic coupler.

[0013] In some embodiments, a plurality of defoaming screws are further provided in the dissolution tank, and a second gear drivingly connected to the motor is also provided. The second gear and the defoaming screws are connected through a second magnetic coupler.

[0014] In some embodiments, the radial dimension of the first end of the defoaming spiral is greater than that of the second end of the defoaming spiral. The first end is adjacent to the bottom of the dissolving tank, and the second end is adjacent to the top of the dissolving tank.

[0015] The beneficial effects of the present invention are as follows: In the dissolving reaction, detection is performed when preset conditions are met. By making the vacuum degree in the dissolving tank during detection the same as that in the dissolving tank before the dissolving reaction, the second gas mass of the generated gas can be represented by the difference between the first mass before the dissolving reaction and the second mass during the dissolving reaction, and then compared with the first gas mass of the theoretically generated gas, so as to effectively determine whether the dissolving reaction is completed and achieve automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings here show specific examples of the technical solutions of the present invention and form a part of the description together with the specific embodiments, and are used to explain the technical solutions, principles and effects of the present invention.

[0017] Unless otherwise specified or defined, in different drawings, the same reference numerals represent the same or similar technical features. For the same or similar technical features, different reference numerals may also be used to represent them.

[0018] Figure 1 is a flowchart of a method for monitoring a material dissolving reaction disclosed in an embodiment of the present invention; Figure 2 is a schematic diagram of a material dissolving reaction system disclosed in an embodiment of the present invention; Figure 3 is Figure 2 a longitudinal sectional view of the dissolving tank in the embodiment.

[0019] Description of Reference Numerals: 10. Dissolving tank, 101. Tank body, 102. Cover body, 103. Liquid inlet, 104. Stirring shaft, 105. Defoaming spiral, 11. Feed tank, 12. Control device, 13. First electric ball valve, 14. First communication pipe, 15. Sending silo, 16. First pneumatic ball valve, 17. First gas cylinder, 18. First pneumatic diaphragm valve, 19. Liquid inlet pipe, 20. Second pneumatic ball valve, 21. Air inlet, 22. Air inlet pipe, 23. Second gas cylinder, 24. Second pneumatic diaphragm valve, 25. Air outlet, 26. Air outlet pipe, 27. Vacuum pump, 28. Third pneumatic diaphragm valve, 29. Detection pipe, 30. Three-way valve, 31. Detector, 32. Tail gas pipe, 33. Tail gas treatment pipe, 34. Weighing sensor, 35. Vacuum degree sensor, 36. Motor, 37. First gear, 38. First magnetic coupler, 39. Second gear, 40. Second magnetic coupler, 41. Second communication pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. In the context of combining the technical solutions of the present invention with practical scenarios, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solutions of the present invention. The "first, second..." used herein is only for differentiating names and does not represent a specific quantity or order. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element at the same time; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element at the same time. When an element is considered to be "provided in" another element, it can be directly provided in the other element or there can be an intermediate element at the same time.

[0022] Unless otherwise specified or defined, the "said" and "the" used herein refer to the technical features or technical contents mentioned or described before the corresponding position. The technical features or technical contents can be the same as or similar to the technical features or technical contents they mention. In addition, the terms "comprising" and "having" used herein and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0023] In order to effectively monitor the material dissolution reaction and determine whether the dissolution reaction is completed, the present invention provides a method for monitoring the material dissolution reaction. By detecting the vacuum degree in real time and discharging the gas generated by the reaction, maintaining the same vacuum degree before and after the gas discharge, and calculating the mass of the discharged gas using the mass measured by a weighing sensor, the monitoring of the dissolution reaction process is realized. It not only improves the accuracy and real-time performance of the dissolution reaction detection, but also realizes automatic control, reduces manual intervention, and improves production efficiency and safety. Among them, the vacuum degree of the container refers to the degree to which the gas pressure in the container is lower than the atmospheric pressure, which is the difference between the absolute pressure in the container and the atmospheric pressure. If the atmospheric pressure is 100 KPa and the absolute pressure in the container is 10 KPa, the pressure difference is -90 KPa, and the vacuum degree is 90 KPa.

[0024] AsFigure 1 As shown, the specific steps include: Step S100: Based on the reaction equation, calculate the first gas mass of the gas generated by the dissolution reaction according to the masses of all materials. The reaction equation refers to the chemical reaction equation on which the material dissolution reaction is based. Different materials correspond to different reaction equations. Through the quantitative relationship of the chemical reaction equation, the theoretically generated gas mass can be calculated. Specifically: Using the quantitative conservation relationship of the chemical reaction, based on the balanced reaction equation, ensure that the number of atoms of each element is conserved, thereby determining the molar ratio of reactants to products (i.e., the equation coefficient ratio); then, according to the masses, concentrations, volumes, etc. of all materials, convert them to the amount of substance through the molar mass or molar concentration formula, and then determine the limiting reactant (i.e., the material that determines the theoretical gas yield); finally, according to the amount of substance of the limiting reactant and the coefficient ratio of the gas product in the equation, calculate the mass of the gas substance to obtain the first gas mass.

[0025] Step S200: Make the environment in the dissolution tank reach the target environment. The target environment means that the internal environment formed by air, water, etc. in the dissolution tank will not affect the dissolution reaction in the dissolution tank and the quality of the generated gas. The environment in the dissolution tank can be made to reach the target environment by evacuating the dissolution tank.

[0026] Step S300: During the dissolution reaction, when the preset conditions are met, make the vacuum degree in the dissolution tank the same as the vacuum degree in the dissolution tank before the dissolution reaction, calculate the difference between the first mass before the dissolution reaction and the second mass during the dissolution reaction to obtain the second gas mass. Among them, the first mass and the second mass are the sum of the masses of the dissolution tank, the first reaction material, and the second reaction material. When the difference between the first gas mass and the second gas mass is less than or equal to the preset threshold, it is determined that the dissolution reaction is completed; otherwise, it is determined that the dissolution reaction is not completed.

[0027] Before the dissolution reaction, weigh the dissolution tank, the first reaction material, and the second reaction material, and calculate the sum of the masses of the dissolution tank, the first reaction material, and the second reaction material to obtain the first mass.

[0028] During the dissolution reaction process, when the preset conditions are met, the dissolution reaction in the dissolution tank is detected, and based on the detection results, it is determined whether the dissolution reaction is completed. Among them, the preset conditions can be time limits. For example, the time interval between the current time and the last detection reaches 1 minute, or they can be state limits. For example, the vacuum degree in the dissolution tank reaches a certain value; it can also be a combination of the vacuum degree and the time interval to form the preset conditions; it can also be the change rate of the vacuum degree (such as the vacuum degree changes very little over a period of time). The specific process of obtaining the detection results is as follows: First, make the vacuum degree in the dissolution tank during detection the same as the vacuum degree in the dissolution tank before the dissolution reaction. Then, weigh the dissolution tank to obtain the sum of the masses of the dissolution tank, the first reaction material in the dissolution tank, and the second reaction material in the dissolution tank at the detection moment, that is, the second mass. Calculate the difference between the first mass and the second mass to obtain the second gas mass. Then, determine whether the dissolution reaction is completed based on whether the second gas mass is close to the theoretically calculated first gas mass. That is, when the difference between the first gas mass and the second gas mass is less than or equal to the preset threshold, it is determined that the dissolution reaction is completed; otherwise, it is determined that the dissolution reaction is not completed. Among them, the preset threshold can be set according to the materials and the types of generated gases, or it can be set according to empirical values.

[0029] Therefore, in the present invention, by maintaining the same vacuum degree in the dissolution tank before and after gas discharge, the mass difference of the dissolution tank before and after gas discharge can be equivalent to the mass of the gas generated by the dissolution reaction, so as to be compared with the theoretically generated gas mass, realize the monitoring of the dissolution reaction process, determine whether the dissolution reaction is completed, and improve production efficiency and safety.

[0030] The embodiment of the present invention runs on a battery production line. The material dissolution reaction monitoring method runs on the PLC (programmable logic controller) on the battery production line, and the slurry (i.e., the first reaction material) and the powder material (i.e., the second reaction material) need to undergo a dissolution reaction. The PLC can determine whether the dissolution reaction of the powder material and the slurry is completed. It should be noted that the material dissolution reaction monitoring method can also be deployed on other control devices, such as electronic devices, to carry out production control together with the PLC; the dissolution reaction can also occur between two or more materials; the materials that produce chemical reactions are not limited to liquid materials and powder materials, and can also be other types of materials, such as liquid materials and solid materials, etc.

[0031] In this embodiment, first, according to the chemical reaction equation of the slurry and the powder, the mass of the gas that can be theoretically generated is calculated by combining the mass of the slurry and the mass of the powder participating in the dissolution reaction, that is, the first gas mass. Then, the dissolution tank is evacuated by a vacuum pump, and inert gases such as helium, argon, and xenon are introduced into the dissolution tank to displace the moisture and air in the dissolution tank. A detector is installed on the gas output pipe of the dissolution tank. When it is detected by the detector that the moisture and air in the dissolution tank are completely displaced, it is determined that the environment in the dissolution tank reaches the target environment, and the displacement process is stopped. Compared with the conventional operation of only evacuating the air, the displacement operation in this embodiment can better ensure that there is no interference from other impurities during the dissolution reaction.

[0032] After the environment in the dissolution tank reaches the target environment, the slurry is pumped into the dissolution tank, and the powder is positively pressured and conveyed into the feed tank, where the feed tank is connected to the dissolution tank through a pipeline. Then, the dissolution tank is evacuated to make the vacuum degree in the dissolution tank reach the first preset value. Then, the dissolution tank is weighed to obtain the sum of the mass of the dissolution tank and the first reaction material. On this basis, the mass of the second reaction material is added to obtain the first mass. That is, the first mass is the sum of the mass of the dissolution tank, the first reaction material, and the second reaction material participating in the dissolution reaction. Preferably, as in this embodiment, the feed tank is installed on the dissolution tank, and the dissolution tank and the feed tank can be weighed together, and the first mass can be obtained by weighing once. Then, the second reaction material is put into the dissolution tank from the feed tank to start the dissolution reaction. By putting the first reaction material and the second reaction material into the dissolution tank step by step, the first preset value of the vacuum degree and the first mass will not be affected by the dissolution reaction, improving the detection accuracy. Moreover, since the feed tank is connected to the dissolution tank through a pipeline, the pressure in the feed tank is the same as that in the dissolution tank during evacuation, so that when the powder in the feed tank is put into the dissolution tank, the pressure in the dissolution tank will not change, achieving a pressure stabilizing effect and ensuring the accuracy of the first preset value.

[0033] During the dissolution reaction, the vacuum degree in the dissolution tank is detected to obtain the measured value. When the measured value is less than or equal to the second preset value, or the difference between the measured value and the first preset value is greater than the vacuum degree threshold, or the change rate of the vacuum degree in the dissolution tank is less than the preset threshold, it is determined that the preset conditions are met. At this time, it is necessary to detect the second gas mass of the gas generated by the dissolution, and determine whether the dissolution reaction is completed based on the second gas mass and the first gas mass. Specifically, during the detection, first, the dissolution tank is evacuated to make the vacuum degree in the dissolution tank reach the first preset value, and the dissolution tank is weighed to obtain the second mass. The difference between the first mass and the second mass is calculated to obtain the second gas mass. By evacuating the air during the detection, the vacuum degree in the dissolution tank at the detection moment reaches the vacuum degree before the dissolution reaction, so that it is possible to measure the mass of the generated gas by the difference between the first mass and the second mass before and after the dissolution reaction.

[0034] As described above, in this embodiment, by feeding materials step by step, the vacuum degree in the dissolution tank before the dissolution reaction is accurate. During the dissolution reaction, by making the vacuum degree in the dissolution tank the same as that before the dissolution reaction, it is ingeniously achieved that the mass difference between the first mass before the dissolution reaction and the second mass during detection can be used as the mass of the generated gas, so as to determine whether the dissolution reaction is completed by comparing with the mass of the theoretically generated gas.

[0035] Based on the above material dissolution reaction monitoring method, the present invention further provides a material dissolution reaction monitoring device, including a memory storing executable program codes and a processor coupled to the memory; the processor calls the executable program codes stored in the memory for executing the material dissolution reaction monitoring method.

[0036] This embodiment also provides a material dissolution reaction system deployed in a battery production line, as Figure 2 shown. The material dissolution reaction system mainly includes: a dissolution tank 10, a feed tank 11, and a control device 12. The dissolution tank 10 includes a tank body 101 and a cover body 102. The feed tank 11 is fixedly installed on the cover body 102. The feed tank 11 is used to store the powder for the dissolution reaction. A first electric ball valve 13 is provided between the dissolution tank 10 and the feed tank 11. When the first electric ball valve 13 is opened, the powder in the feed tank 11 falls into the dissolution tank 10 under the action of gravity. In order to ensure that the feeding of the feed tank 11 does not affect the vacuum degree in the dissolution tank 10 and ensure the accuracy of the vacuum degree before the dissolution reaction, a first connecting pipe 14 is also provided between the feed tank 11 and the dissolution tank 10. Through the first connecting pipe 14, the dissolution tank 10 and the feed tank 11 can be evacuated together so that the vacuum degrees of the dissolution tank 10 and the feed tank 11 are the same. If the powder is directly transported to the dissolution tank 10 under positive pressure, due to the difference between the transportation pressure and the pressure in the dissolution tank 10, it will inevitably affect the vacuum degree in the dissolution tank 10 and lead to inaccurate determination results.

[0037] The feed tank 11 is also connected to a sending bin 15 through a pipeline. A first pneumatic ball valve 16 is installed on the pipeline between the sending bin 15 and the feed tank 11. The sending bin 15 is also connected to a first gas cylinder 17 through a pipeline. A first pneumatic diaphragm valve 18 is installed on the pipeline between the sending bin 15 and the first gas cylinder 17. When the first pneumatic diaphragm valve 18 and the first pneumatic ball valve 16 are opened, the powder in the sending bin 15 is transported to the feed tank 11 under positive pressure through the pressure of the first gas cylinder 17.

[0038] The pipeline between the sending silo 15 and the first gas cylinder 17 is connected to the air outlet pipe 26 through a second connecting pipe 41. A pneumatic diaphragm valve is installed on the second connecting pipe 41. By setting the second connecting pipe 41, the vacuum pump 27 can evacuate the pipeline between the sending silo 15 and the first gas cylinder 17 and the sending silo 15, ensuring that there are no other impurities in the powder fed into the feeding tank 11 and improving the detection accuracy.

[0039] A liquid inlet 103 is provided on the cover body 102 of the dissolving tank 10. A liquid inlet pipe 19 is connected to the liquid inlet 103, and a second pneumatic ball valve 20 is installed on the liquid inlet pipe 19. After connecting the liquid inlet pipe 19 to a liquid silo (not shown in the figure) and opening the second pneumatic ball valve 20, the slurry can be pumped into the dissolving tank 10.

[0040] Since inert gas is used to displace the air and moisture in the dissolving tank 10 before the dissolving reaction, an air inlet 21 is provided on the cover body 102 of the dissolving tank 10. The air inlet 21 is connected to a second gas cylinder 23 through an air inlet pipe 22. The second gas cylinder 23 is filled with inert gas. A second pneumatic diaphragm valve 24 is installed on the air inlet pipe 22. When the second pneumatic diaphragm valve 24 is opened, the inert gas in the second gas cylinder 23 can enter the dissolving tank 10.

[0041] An air outlet 25 is also provided on the cover body 102 of the dissolving tank 10. An air outlet pipe 26 is connected to the air outlet 25. One end of the air outlet pipe 26 is equipped with a vacuum pump 27, and a third pneumatic diaphragm valve 28 is also installed on the air outlet pipe 26. When the third pneumatic diaphragm valve 28 is opened and the vacuum pump 27 works, the dissolving tank 10 can be evacuated to maintain the vacuum degree inside the dissolving tank 10. A detection pipe 29 is also connected to the vacuum pump 27. One end of the detection pipe 29 is connected to a three-way valve 30, and the three-way valve 30 is also connected to a detector 31 and a tail gas pipe 32. The detector 31 is used to detect the gas displaced from the inside of the dissolving tank 10 when using inert gas to displace the air and moisture in the dissolving tank 10 to determine whether the displacement is completed. The tail gas pipe 32 is connected to a tail gas treatment pipe 33, and the tail gas treatment pipe 33 is used to treat the gas displaced from the inside of the dissolving tank 10 and the gas extracted from the inside of the dissolving tank 10 during the dissolving reaction.

[0042] A plurality of weighing sensors 34 are installed at intervals on the tank body 101 of the dissolving tank 10. The weighing sensors 34 are used to weigh the dissolving tank 10 and the feeding tank 11 together. In this embodiment, using the feeding tank 11 not only does not affect the vacuum degree of the dissolving tank 10 during feeding, but also, compared with weighing the dissolving tank 10 and the powder separately, the total mass of the dissolving tank 10, the slurry and the powder can be obtained through one weighing, and the obtained first mass is more accurate.

[0043] A vacuum sensor 35 is installed on the cover 102 of the dissolution tank 10. In this embodiment, the vacuum sensor 35 is a digital pressure sensor. The vacuum sensor 35 is used to detect the vacuum degree inside the dissolution tank 10 during the dissolution reaction, obtain the measured value, and transmit the measured value to the control device 12.

[0044] The control device 12 is a PLC in the form of a control cabinet. The control device 12 is electrically connected to at least the vacuum pump 27 and the weighing sensor 34, and is used to control the entire system. A material dissolution reaction monitoring method is running on the control device 12.

[0045] As Figure 3 shown, there is a stirring shaft 104 inside the dissolution tank 10, and stirring through the stirring shaft 104 can accelerate the dissolution reaction. A motor 36 and a first gear 37 drivingly connected to the motor 36 are installed on the cover 102 of the dissolution tank 10. The motor 36 drives the first gear 37, and the first gear 37 drives the stirring shaft 104 to rotate. In order to make the vacuum degree inside the dissolution tank 10 accurate and reliable, in this embodiment, the first gear 37 and the stirring shaft 104 are connected through a first magnetic coupler 38, and the torque is transmitted through magnetic force, avoiding the risk of leakage at the shaft seal and ensuring the sealing performance of the dissolution tank 10.

[0046] During the reaction process, the generated gas may be wrapped in the material and cannot be discharged in time. In this embodiment, a plurality of defoaming screws 105 are also installed inside the dissolution tank 10. A second gear 39 is installed on the cover 102 of the dissolution tank 10. The second gear 39 is drivingly connected to the motor 36, and the second gear 39 and the defoaming screw 105 are connected through a second magnetic coupler 40. The second magnetic coupler 40 also avoids the risk of leakage at the shaft seal and ensures the sealing performance of the dissolution tank.

[0047] In this embodiment, the radial dimension of one end of the defoaming screw 105 adjacent to the bottom of the dissolution tank 10 is designed to be larger than the radial dimension of one end adjacent to the top of the dissolution tank 10. The defoaming screw 105 adopts a form with a larger bottom and a smaller top, which can turn up the bubbles generated below in time, increase the reaction rate; in addition, it can also be used for stirring, making the dissolution reaction more thorough.

[0048] In some embodiments, a jacket (not shown in the figure) can also be installed on the dissolution tank 10, and the dissolution tank 10 can be heated through the jacket according to the requirements of the material reaction, making the dissolution reaction rate faster.

[0049] The specific process of monitoring the material dissolution using the material dissolution reaction system of this embodiment is as follows: (1)First, turn on the vacuum pump 27 and the third pneumatic diaphragm valve 28 to evacuate the dissolving tank 10. Then, open the second pneumatic diaphragm valve 24 to introduce inert gas to completely displace the moisture and air in the dissolving tank 10 (check whether the displacement is complete through the detector 31). After that, close the vacuum pump 27, the third pneumatic diaphragm valve 28, and the second pneumatic diaphragm valve 24 to ensure that no other impurities interfere during the dissolving reaction process. (2)Open the second pneumatic ball valve 20 to pump the slurry participating in the reaction into the dissolving tank 10, and close the second pneumatic ball valve 20 after pumping is completed. (3)Open the first pneumatic ball valve 16 and the first pneumatic diaphragm valve 18 to send the powder material into the feeding tank 11 by positive pressure transmission. Close the first pneumatic ball valve 16 and the first pneumatic diaphragm valve 18 after the conveying is completed. (4)Turn on the vacuum pump 27 and the third pneumatic diaphragm valve 28 to evacuate the dissolving tank 10 and the feeding tank 11 (the feeding tank 11 and the dissolving tank 10 are connected by the first connecting pipe 14). For example, evacuate to a vacuum of 80 KPa. Then, close the vacuum pump 27 and the third pneumatic diaphragm valve 28. Then, weigh through the weighing sensor 34 to obtain the first mass. (5)Turn on the motor 36, and then open the first electric ball valve 13. The powder material will fall into the dissolving tank 10 by gravity to start the reaction, and jacket heating can be carried out according to the reaction requirements. (6)During the dissolving reaction, gas is generated, which will cause the vacuum degree in the dissolving tank 10 to decrease. The vacuum degree sensor 35 can detect the vacuum degree in the dissolving tank 10 in real time. When the vacuum degree drops to 75 KPa, through PLC control, start the vacuum pump 27 to extract the gas in the dissolving tank 10 until the vacuum degree in the dissolving tank 10 reaches 80 KPa and then stop. Weigh the total mass of the dissolving tank 10 through the weighing sensor 34 to obtain the second mass. Calculate the difference between the first mass and the second mass to obtain the second gas mass. Compare whether the second gas mass is close to the calculated theoretical gas mass (i.e., the first gas mass) (for example, the second gas mass is more than 95% of the theoretical gas mass). If it is not close, continue the reaction. Wait until the next time the vacuum degree drops to 75 KPa, then recalculate the second gas mass and continue to compare it with the first gas mass until the second gas mass is close to the first gas mass. At this time, it is determined that the dissolving reaction is completed.

[0050] In summary, the material dissolving reaction system of this embodiment combines vacuum control and real-time weighing technology, skillfully integrates the real-time detection of reaction gas production into the operation process of the dissolving tank, and can timely determine whether the dissolving reaction is complete through the data of the weighing sensor.

[0051] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solutions of the present invention, and to completely describe the technical solutions, purposes and effects of the present invention. The purpose is to enable the public to understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the protection scope of the present invention hereby.

[0052] The above embodiments are not exhaustive listings based on the present invention either. Besides, there may be multiple other embodiments not listed. Any substitution and improvement made on the basis of not violating the concept of the present invention fall within the protection scope of the present invention.

Claims

1. Method for monitoring material dissolution reaction, characterized in that, include: Based on the reaction equation, the mass of the first gas generated by the dissolution reaction is calculated according to the mass of all materials; Make the environment in the dissolving tank reach the target environment; During the dissolution reaction, when the preset conditions are met, the vacuum degree in the dissolution tank is made the same as the vacuum degree in the dissolution tank before the dissolution reaction, and the difference between the first mass before the dissolution reaction and the second mass in the dissolution reaction is calculated to obtain the second gas mass, the first mass and the second mass being the sum of the masses of the dissolution tank, the first reaction material and the second reaction material. When the difference between the first gas mass and the second gas mass is less than or equal to a preset threshold value, the dissolution reaction is determined to be completed, otherwise, the dissolution reaction is determined to be incomplete.

2. The method for monitoring the material dissolution reaction according to claim 1, characterized in that The materials include a first reaction material and a second reaction material. After the environment in the dissolving tank reaches the target environment, the method further includes: Putting the first reaction material into the dissolving tank, putting the second reaction material into a feed tank installed on the dissolving tank and connected to the dissolving tank pipeline, evacuating the dissolving tank to make the vacuum degree in the dissolving tank reach a first preset value, weighing the dissolving tank to obtain the first mass, putting the second reaction material from the feed tank into the dissolving tank, and starting the dissolution reaction; The step of making the vacuum degree in the dissolution tank the same as the vacuum degree in the dissolution tank before the dissolution reaction, calculating the difference between the first mass before the dissolution reaction and the second mass during the dissolution reaction, and obtaining the second gas mass comprises: The dissolving tank is evacuated to make the vacuum degree in the dissolving tank reach a first preset value, and the dissolving tank is weighed to obtain the second mass, and the difference between the first mass and the second mass is calculated to obtain the second gas mass.

3. The monitoring method for material dissolution reaction according to claim 2, wherein During the dissolution reaction, the vacuum degree in the dissolution tank is detected to obtain a measured value. When the measured value is less than or equal to a second preset value, it is determined that the preset condition is met.

4. The method for monitoring the material dissolution reaction according to any one of claims 1-3, characterized in that, The step of making the environment in the dissolving tank reach the target environment comprises: The dissolving tank is evacuated and the water and air in the dissolving tank are replaced with inert gas.

5. Material dissolution reaction monitoring device, characterized in that It comprises a memory storing executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the material dissolution reaction monitoring method according to any one of claims 1 to 4.

6. Material dissolution reaction system, characterized in that, include: A vacuum pump, a dissolving tank, a weighing sensor, and a control device, wherein the vacuum pump is connected to the dissolving tank pipeline, the control device is electrically connected to the vacuum pump and the weighing sensor, the vacuum pump is used to evacuate the dissolving tank, the dissolving tank is used to perform a material dissolving reaction, the weighing sensor is used to weigh the dissolving tank, and the control device executes the material dissolving reaction monitoring method as described in any one of claims 1 to 4.

7. The material dissolution reaction system according to claim 6, wherein, It also includes a vacuum sensor, which is used to detect the vacuum degree in the dissolution tank during the dissolution reaction, obtain the measured value, and transmit the measured value to the control device.

8. The material dissolution reaction system according to claim 6, characterized in that, The dissolving tank is provided with a stirring shaft, a motor and a first gear connected to the motor in a transmission manner, and the first gear and the stirring shaft are connected via a first magnetic coupler.

9. The material dissolution reaction system according to claim 8, characterized in that, The dissolving tank further has a plurality of defoaming screws, and a second gear drivingly connected to the motor is also provided. The second gear and the defoaming screws are connected by a second magnetic coupler.

10. The material dissolution reaction system according to claim 9, wherein The radial dimension of the first end of the defoaming screw is larger than that of the second end of the defoaming screw. The first end is adjacent to the bottom of the dissolving tank, and the second end is adjacent to the top of the dissolving tank.

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