Intelligent preparation system of rare earth oxides based on data self-monitoring

Abstract

The present application relates to rare earth preparation monitoring technical field, especially to a kind of intelligent preparation system of rare earth oxide based on data self-monitoring, including feeding unit, rotary unit, heating unit, detection unit, discharge unit and central control unit.The present application is by being set central control unit, by receiving and analyzing the temperature value of the rotary kiln side wall corresponding point position collected by each temperature detector, the temperature distribution of each corresponding point position of rotary kiln side wall can be quickly analyzed whether uniform, to quickly analyze the specific heating condition of rotary kiln in running process, simultaneously, by the heating condition of rotary kiln analyzed, corresponding processing mode is selected to adjust the operating parameter of corresponding component to corresponding value, the situation that the prepared rare earth product is low caused by the uneven temperature distribution in rotary kiln can be effectively avoided, to effectively improve the preparation efficiency of the system for rare earth oxide in the present application.

Description

Technical Field

[0001] This invention relates to the field of rare earth preparation monitoring technology, and in particular to an intelligent rare earth oxide preparation system based on data self-monitoring. Background Technology

[0002] Rare earth elements possess excellent photoelectric and electromagnetic properties, enabling them to combine with other materials to form a wide variety of new materials with diverse properties. This significantly improves the quality and performance of these products, leading to their widespread application in military, aerospace, metallurgy, medical, catalytic, new energy, and other functional materials fields.

[0003] Rare earth oxides are important raw materials for rare earth electrolysis and the preparation of other functional materials, occupying a crucial position in the rare earth industry chain. Rare earth oxidation mainly uses rare earth carbonates or rare earth oxalates as raw materials. There are many methods for preparing rare earth oxides, such as pusher kilns, shuttle kilns, tunnel kilns, roller kilns, and rotary kilns. Currently, most rare earth production enterprises mainly use roller kilns because this method offers controllable processes and produces high-grade rare earth oxides, but its operating costs are relatively high.

[0004] While existing technologies can reduce the cost of rare earth oxide preparation by using specific equipment, the amount of rare earth fed into the rotary kiln during the preparation process is unstable. At the same time, the heating device only supplies ignited natural gas to a specific location in the rotary kiln, which easily leads to uneven heating of the rare earth in the kiln. This results in the rare earth oxides produced failing to meet the predetermined standards, thereby reducing the preparation efficiency of rare earth oxides. Summary of the Invention

[0005] To address this issue, the present invention provides a smart rare earth oxide preparation system based on data self-monitoring, which overcomes the problem of low rare earth oxide preparation efficiency caused by the inability to uniformly heat rare earths in the prior art.

[0006] To achieve the above objectives, the present invention provides a smart rare earth oxide preparation system based on data self-monitoring, comprising: The feeding unit includes a material box for loading rare earth raw materials and a conveying device for conveying the rare earth raw materials in the material box. The feeding unit is also equipped with a dust collection device to recover the dust scattered by the conveying device during the conveying of rare earth raw materials. A rotary unit, which is located at the output end of the conveying device, is used to receive and calcine the rare earth raw materials output by the conveying device, including a rotary kiln for receiving and storing the rare earth raw materials and a drive device located below the rotary kiln to drive the rotary kiln to rotate. A heating unit, located at the output port of the rotary unit, is used to supply natural gas into the rotary kiln to regulate the temperature of the environment inside the rotary kiln by igniting the natural gas. The detection unit includes several temperature detectors evenly arranged at corresponding positions on the side wall of the rotary kiln to detect the surface temperature of the rotary kiln, and a mass detector arranged on the conveying device to detect the amount of rare earth raw materials conveyed by the conveying device. The discharge unit is connected to the rotary unit to receive the rare earth output from the rotary unit and to package the rare earth. The central control unit is connected to corresponding components in the feeding unit, the rotary unit, and the detection unit. It is used to determine whether the calcination of rare earth raw materials by the rotary kiln meets the preset standard based on the temperature values ​​measured by each temperature detector. When it is determined that the calcination of rare earth raw materials by the rotary kiln does not meet the preset standard, a secondary determination is made based on the amount of rare earth in the rotary kiln to determine whether the calcination of rare earth raw materials by the rotary kiln meets the preset standard. Alternatively, it can adjust the natural gas output of the heating unit or the rotation speed of the rotary kiln to the corresponding value based on the temperature measured by each temperature detector.

[0007] Furthermore, under a first preset condition, the central control unit controls each of the temperature detectors to detect the temperature at corresponding positions on the surface of the rotary kiln, and the central control unit calculates the average value of each temperature to determine whether the calcination of rare earth raw materials by the rotary kiln meets the preset standard. If the average temperature is greater than the third preset temperature value preset in the central control unit, the central control unit determines that the rotary kiln does not meet the standard for calcining rare earth raw materials, and controls the drive device to adjust the rotation speed of the rotary kiln to the corresponding value according to the difference between the average temperature and the third preset temperature. If the average temperature is less than or equal to the third preset temperature value and greater than the second preset temperature value preset in the central control unit, the central control unit initially determines that the calcination of rare earth raw materials by the rotary kiln meets the standard, and makes a second determination on whether the calcination of rare earth raw materials by the rotary kiln meets the standard based on the rare earth raw material conveying amount of the feeding unit per unit time. If the average temperature is less than or equal to the second preset temperature value and greater than the first preset temperature value preset in the central control unit, the central control unit determines that the calcination of rare earth raw materials by the rotary kiln meets the standard. If the average temperature is less than or equal to the first preset temperature value, the central control unit determines that the rotary kiln does not meet the standard for calcining rare earth raw materials, and adjusts the natural gas output of the heating unit to the corresponding value according to the difference between the first preset temperature value and the average temperature value. The first preset condition is the preset system running time.

[0008] Furthermore, under the second preset condition, the central control unit records the difference between the average temperature and the third preset temperature as an excessively high difference, and controls the drive device to adjust the rotational speed of the rotary kiln to the corresponding value based on the excessively high difference. If the excessive height difference is less than or equal to the first preset excessive height difference set in the central control unit, the central control unit uses the first preset power adjustment coefficient to adjust the operating power of the drive device so that the rotation speed of the rotary kiln is adjusted to the first rotation speed; If the excessive height difference is greater than the first preset excessive height difference and less than or equal to the second preset excessive height difference set in the central control unit, the central control unit uses the second preset power adjustment coefficient to adjust the power of the drive device so that the rotation speed of the rotary kiln is adjusted to the second rotation speed; If the excessive height difference is greater than the second preset excessive height difference, the central control unit uses the third preset power adjustment coefficient to adjust the power of the drive device so that the rotation speed of the rotary kiln is adjusted to the third rotation speed; The second condition is that the average temperature is greater than the third preset temperature value.

[0009] Furthermore, under a third preset condition, the central control unit controls the quality detector to detect the quality of the rare earth raw materials conveyed by the feeding device per unit time, and performs a secondary judgment on whether the calcination of the rare earth raw materials by the rotary kiln meets the standards based on the measured quality. If the mass is less than or equal to the first preset mass set in the central control unit, the central control unit makes a second determination that the calcination of rare earth raw materials by the rotary kiln meets the standard. If the mass is greater than the first preset mass and less than or equal to the second preset mass set in the central control unit, the central control unit determines for the second time that the calcination of rare earth raw materials by the rotary kiln does not meet the standard, and determines the reason why the calcination of rare earth raw materials by the rotary kiln does not meet the standard based on the temperature distribution of the side wall of the rotary kiln. If the mass is greater than the second preset mass, the central control unit determines for the second time that the rotary kiln does not meet the standard for calcining rare earth raw materials, and adjusts the natural gas output of the heating unit to the corresponding value according to the difference between the first preset temperature value and the average temperature value. The third preset condition is that the central control unit initially determines that the rotary kiln's calcination of rare earth raw materials meets the standards.

[0010] Furthermore, the central control unit corrects the adjusted rotational speed of the rotary kiln based on the mass of rare earth raw materials conveyed by the conveying device per unit time: If the mass is less than or equal to the first preset mass, the central control unit uses the first speed correction coefficient to correct the rotation speed of the rotary kiln to the corresponding value; If the mass is greater than the first preset mass and less than or equal to the second preset mass, the central control unit uses the second speed correction coefficient to correct the rotation speed of the rotary kiln to the corresponding value; If the mass is greater than the second preset mass, the central control unit uses a third speed correction coefficient to correct the rotation speed of the rotary kiln to the corresponding value.

[0011] Furthermore, the central control unit determines whether there is a deviation in the temperature distribution on the outer wall of the rotary kiln based on the variance of the temperature values ​​measured by each of the temperature detectors. If the variance is greater than the first preset variance set in the central control unit, the central control unit determines that there is a deviation in the temperature distribution of the rotary kiln sidewall, and determines the reason why the rotary kiln does not meet the standard for calcining rare earth raw materials based on the distribution of each temperature value. If the variance is less than or equal to the first preset variance, the central control unit initially determines that there is no deviation in the temperature distribution of the rotary kiln sidewall, and determines that the reason why the calcination of rare earth raw materials in the rotary kiln does not meet the standard is that the amount of fuel in the rotary kiln is lower than the preset standard. Based on the difference between the first preset temperature value and the average temperature, the natural gas output of the heating unit is adjusted to the corresponding value.

[0012] Furthermore, under the fourth preset condition, the central control unit will plot temperature curves based on each temperature value and determine the temperature distribution on the outer wall of the rotary kiln according to the temperature curves. It will then determine, based on the distribution of each temperature value, the reasons why the rotary kiln's calcination of rare earth raw materials does not meet the standards. If the number of peaks in the temperature curve is greater than or equal to the preset number set in the central control unit, the central control unit determines that the temperature distribution on the outer wall of the rotary kiln is uniform, and determines for the second time that the reason why the calcination of rare earth raw materials in the rotary kiln does not meet the standard is that the quality of rare earth raw materials in the rotary kiln is higher than the preset standard. The central control unit adjusts the natural gas output of the heating unit to the corresponding value according to the difference between the first preset temperature value and the average temperature value. If the number of peaks in the temperature curve is less than the preset number set in the central control unit, the central control unit determines that the temperature distribution on the outer wall of the rotary kiln is uneven, and determines for the second time that the reason why the calcination of rare earth raw materials in the rotary kiln does not meet the standard is that the quality of rare earth raw materials in the rotary kiln is higher than the preset standard. The central control unit adjusts the moving speed of the conveying device to the corresponding value according to the difference between the maximum temperature value and the minimum temperature value among the temperature values, so that the quality of rare earth raw materials conveyed by the conveying device per unit time is reduced to the corresponding value. The fourth preset condition is that the variance is greater than the first preset variance.

[0013] Furthermore, the central control unit records the difference between the maximum and minimum temperature values ​​as a temperature difference value, and adjusts the moving speed of the conveying device to the corresponding value based on the temperature difference value. If the temperature difference value is less than or equal to the first preset temperature difference value set in the central control unit, the central control unit uses the first preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value. If the temperature difference value is greater than the first preset temperature difference value and less than or equal to the second preset temperature difference value set in the central control unit, the central control unit uses the second preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value. If the temperature difference value is greater than the second preset temperature difference value, the central control unit uses the first preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value.

[0014] Furthermore, the central control unit records the difference between the first preset temperature value and the average temperature as an excessively low difference, and adjusts the natural gas output of the heating unit for the rotary kiln to a corresponding value based on the excessively low difference: If the low difference is less than or equal to the first preset low difference set in the central control unit, the central control unit uses the first preset air intake adjustment coefficient to adjust the natural gas output of the heating unit for the rotary kiln to the corresponding value; If the under-low difference is greater than the first preset under-low difference and less than or equal to the second preset under-low difference set in the central control unit, the central control unit uses the second preset air intake adjustment coefficient to adjust the natural gas output of the heating unit for the rotary kiln to the corresponding value. If the excessively low difference is greater than the second preset excessively low difference, the central control unit uses the third preset air intake adjustment coefficient to adjust the natural gas output of the heating unit for the rotary kiln to the corresponding value.

[0015] Furthermore, the rare earth raw material is rare earth carbonate or rare earth oxalate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up a central control unit, the present invention can quickly analyze whether the temperature distribution at each corresponding point on the side wall of the rotary kiln is uniform by receiving and analyzing the temperature values ​​collected by each temperature detector. This allows for rapid analysis of the specific heating conditions of the rotary kiln during operation. Simultaneously, by analyzing the heating conditions of the rotary kiln, corresponding processing methods can be selected to adjust the operating parameters of the corresponding components to the corresponding values. This effectively avoids the occurrence of low-grade rare earth products due to uneven temperature distribution within the rotary kiln, thereby effectively improving the preparation efficiency of rare earth oxides by the system described in the present invention.

[0017] Furthermore, the central control unit of the present invention determines whether the calcination of rare earth raw materials in the rotary kiln meets the standards based on the average temperature measured by each of the temperature detectors. By using the average temperature, a rapid and stable preliminary determination can be made on whether the rare earth raw materials inside the rotary kiln are heated evenly during operation. This ensures the accuracy of the determination of the rotary kiln's operating status while effectively improving the determination rate of the central control unit. This provides sufficient time for subsequent processing of the determination results, further ensuring the quality of the obtained rare earth oxides and improving the preparation efficiency of rare earth oxides by the system of the present invention.

[0018] Furthermore, when the central control unit determines that the temperature is higher than the preset value, it adjusts the operating power of the drive device to the appropriate value based on the excessive difference, thereby adjusting the rotation speed of the rotary kiln to the corresponding value. By increasing the rotation speed of the rotary kiln when the temperature is higher than the preset standard, it ensures that the heating module completes uniform heating of each corresponding point of the rotary kiln. This further ensures the quality of the rare earth oxides obtained and further improves the preparation efficiency of the system for rare earth oxides of the present invention.

[0019] Furthermore, the central control unit determines the amount of rare earth raw materials in the rotary kiln based on the mass of rare earth raw materials conveyed by the feeding device per unit time, thereby completing a secondary judgment on whether the calcination of rare earth raw materials in the rotary kiln meets the standard. By determining whether the calcination temperature distribution of rare earth raw materials in the rotary kiln is uniform based on the content of rare earth raw materials in the rotary kiln, it can effectively avoid the deviation of judgment results caused by using the same standard to judge different situations. While effectively reducing the misjudgment rate of whether the rare earth raw materials are heated uniformly, it further improves the preparation efficiency of rare earth oxides by the system of the present invention.

[0020] Furthermore, during the adjustment of the rotary kiln's rotation speed, the central control unit also corrects the adjusted rotation speed based on the amount of rare earth raw materials in the rotary kiln. By making targeted corrections to the rotary kiln, it can avoid the situation where the adjusted rotary kiln's rotation speed is mismatched with the amount of rare earth in the kiln, which would prevent the uniform calcination of the rare earth raw materials in the kiln. This further ensures the quality of the obtained rare earth oxides while further improving the preparation efficiency of the rare earth oxides by the system of the present invention.

[0021] Furthermore, the central control unit determines whether there is a deviation in the temperature distribution on the outer wall of the rotary kiln based on the variance of the temperature values ​​measured by each temperature detector, and determines the reason why the calcination of rare earth raw materials by the rotary kiln does not meet the standard or adjusts the natural gas output of the heating unit to the corresponding value according to the judgment result. This invention determines whether the temperature distribution deviation value at each point exceeds the standard by using variance, and selects the corresponding processing method according to different judgment results. It can quickly complete the processing of different situations caused by temperature distribution, which further ensures the quality of the obtained rare earth oxides and further improves the preparation efficiency of rare earth oxides by the system of this invention.

[0022] Furthermore, the central control unit plots temperature curves based on the temperature values ​​and determines the temperature distribution on the outer wall of the rotary kiln according to the temperature curves. Based on the distribution, it determines the reasons why the calcination of rare earth raw materials in the rotary kiln does not meet the standards. Based on the determined reasons, it adjusts the natural gas output of the heating unit to the corresponding value or reduces the mass of rare earth raw materials conveyed by the conveying device per unit time to the corresponding value. This invention uses temperature curve plotting to quickly and intuitively determine the temperature distribution on the side wall of the rotary kiln, thereby quickly determining the reasons why the calcination of rare earth raw materials in the rotary kiln does not meet the standards. At the same time, the central control unit selects the corresponding treatment method based on the determined reasons, which can quickly and effectively overcome the problem of uneven heating of rare earth raw materials during calcination. While further ensuring the quality of the obtained rare earth oxides, it further improves the preparation efficiency of rare earth oxides by the system of this invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the intelligent rare earth oxide preparation system based on data self-monitoring described in this invention; Figure 2 This is a flowchart illustrating how the central control unit of the present invention determines whether the calcination of rare earth raw materials in the rotary kiln meets a preset standard based on the temperature measured by the temperature detector. Figure 3 This is a flowchart of the process by which the central control unit of the present invention performs a secondary judgment on whether the calcination of rare earth raw materials by the rotary kiln meets the standard based on the mass of rare earth raw materials conveyed by the conveying device per unit time as measured by the quality detector. Figure 4 This is a flowchart illustrating how the central control unit of the present invention determines, for the second time, the reasons why the calcination of rare earth raw materials in the rotary kiln does not meet the standards based on the temperature distribution on the outer wall of the rotary kiln.

[0024] In the diagram: 11. Material bin; 12. Conveying device; 13. Dust collection device; 21. Rotary kiln; 22. Drive device; 3. Heating unit; 41. Temperature detector; 42. Quality detector; 51. Discharge unit. Detailed Implementation

[0025] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0026] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0029] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Please see Figure 1 The diagram shown is a structural schematic of the intelligent rare earth oxide preparation system based on data self-monitoring described in this invention. The intelligent rare earth oxide preparation system based on data self-monitoring described in this invention includes: The feeding unit includes a material box 11 for loading rare earth raw materials and a conveying device 12 for conveying the rare earth raw materials in the material box 11. The feeding unit is also equipped with a dust collection device 13 for recovering the dust scattered by the conveying device in conveying the rare earth raw materials. The rare earth raw materials are rare earth carbonate or rare earth oxalate. A rotary unit is provided at the output end of the conveying device 12 to receive and calcine the rare earth raw materials output by the conveying device 12. It includes a rotary kiln 21 for receiving and storing the rare earth raw materials and a drive device 22 provided below the rotary kiln 21 to drive the rotary kiln 21. Heating unit 3 is located at the output port of the rotary unit and is used to supply natural gas into the rotary kiln 21 to regulate the temperature of the environment inside the rotary kiln 21 by igniting the natural gas. The detection unit includes several temperature detectors 41 uniformly arranged at corresponding positions on the side wall of the rotary kiln 21 to detect the surface temperature of the rotary kiln 21, and mass detectors 42 arranged on the conveying device 12 to detect the amount of rare earth raw materials conveyed by the conveying device 12. The discharge unit 51 is connected to the rotary unit and is used to receive the rare earth output from the rotary unit and to package the rare earth. The central control unit is connected to corresponding components in the feeding unit, rotary unit, and detection unit. It is used to determine whether the calcination of rare earth raw materials by the rotary kiln 21 meets the preset standard based on the temperature values ​​measured by each temperature detector 41. When it is determined that the calcination of rare earth raw materials by the rotary kiln 21 does not meet the preset standard, a secondary determination is made based on the amount of rare earth in the rotary kiln 21 to determine whether the calcination of rare earth raw materials by the rotary kiln 21 meets the preset standard. Alternatively, it can adjust the natural gas output of the heating unit 3 or the rotation speed of the rotary kiln 21 to the corresponding value based on the temperature measured by each temperature detector 41.

[0031] Please see Figure 2 The diagram shows a flowchart illustrating how the central control unit of this invention determines whether the calcination of rare earth raw materials in the rotary kiln 21 meets a preset standard based on the temperature measured by the temperature detector 41. Under a first preset condition, the central control unit controls each temperature detector 41 to detect the temperature at a corresponding position on the surface of the rotary kiln 21. The central control unit calculates the average value of each temperature to determine whether the calcination of rare earth raw materials in the rotary kiln 21 meets the preset standard. If the average temperature is greater than the third preset temperature value in the central control unit, the central control unit determines that the calcination of rare earth raw materials by the rotary kiln 21 does not meet the standard, and controls the drive device 22 to adjust the rotation speed of the rotary kiln 21 to the corresponding value according to the difference between the average temperature and the third preset temperature. If the average temperature is less than or equal to the third preset temperature value and greater than the second preset temperature value preset in the central control unit, the central control unit initially determines that the calcination of rare earth raw materials by rotary kiln 21 meets the standard, and makes a second determination on whether the calcination of rare earth raw materials by rotary kiln 21 meets the standard based on the rare earth raw material conveying amount of the feeding unit per unit time. If the average temperature is less than or equal to the second preset temperature value and greater than the first preset temperature value preset in the central control unit, the central control unit determines that the calcination of rare earth raw materials by rotary kiln 21 meets the standard. If the average temperature is less than or equal to the first preset temperature value, the central control unit determines that the calcination of rare earth raw materials by rotary kiln 21 does not meet the standard, and adjusts the natural gas output of heating unit 3 to the corresponding value according to the difference between the first preset temperature value and the average temperature value. The first preset condition is the preset system running time.

[0032] Specifically, under the second preset condition, the central control unit records the difference between the average temperature and the third preset temperature as an excessively high difference, and controls the drive device 22 to adjust the rotation speed of the rotary kiln 21 to the corresponding value based on the excessively high difference. If the excessive height difference is less than or equal to the first preset excessive height difference set in the central control unit, the central control unit uses the first preset power adjustment coefficient to adjust the operating power of the drive device 22 so that the rotation speed of the rotary kiln 21 is adjusted to the first rotation speed; If the excessive height difference is greater than the first preset excessive height difference and less than or equal to the second preset excessive height difference set in the central control unit, the central control unit uses the second preset power adjustment coefficient to adjust the power of the drive device 22 so that the rotation speed of the rotary kiln 21 is adjusted to the second rotation speed. If the excessively high difference is greater than the second preset excessively high difference, the central control unit uses the third preset power adjustment coefficient to adjust the power of the drive device 22 so that the rotation speed of the rotary kiln 21 is adjusted to the third rotation speed; The second condition is that the average temperature is greater than the third preset temperature value.

[0033] Please see Figure 3 The diagram shows a flowchart illustrating how the central control unit of this invention performs a secondary judgment on whether the calcination of the rare earth raw materials in the rotary kiln 21 meets the standards, based on the mass of the rare earth raw materials conveyed by the feeding device 12 per unit time as measured by the quality detector 42. Under a third preset condition, the central control unit of this invention controls the quality detector 42 to detect the mass of the rare earth raw materials conveyed by the feeding device 12 per unit time and performs a secondary judgment on whether the calcination of the rare earth raw materials in the rotary kiln 21 meets the standards based on the measured mass. If the mass is less than or equal to the first preset mass set in the central control unit, the central control unit makes a second determination that the calcination of rare earth raw materials by rotary kiln 21 meets the standard. If the mass is greater than the first preset mass and less than or equal to the second preset mass set in the central control unit, the central control unit will determine for the second time that the calcination of rare earth raw materials by rotary kiln 21 does not meet the standard, and determine the reason why the calcination of rare earth raw materials by rotary kiln 21 does not meet the standard based on the temperature distribution of the side wall of rotary kiln 21. If the mass is greater than the second preset mass, the central control unit will determine for the second time that the calcination of rare earth raw materials by rotary kiln 21 does not meet the standard, and will adjust the natural gas output of heating unit 3 to the corresponding value according to the difference between the first preset temperature value and the average temperature value. The third preset condition is that the central control unit initially determines that the calcination of rare earth raw materials in rotary kiln 21 meets the standards.

[0034] Specifically, the central control unit corrects the rotational speed of the adjusted rotary kiln 21 based on the mass of rare earth raw materials conveyed by the feeding device 12 per unit time: If the mass is less than or equal to the first preset mass, the central control unit uses the first speed correction coefficient to correct the speed of the rotary kiln 21 to the corresponding value; If the mass is greater than the first preset mass and less than or equal to the second preset mass, the central control unit uses the second speed correction coefficient to correct the speed of the rotary kiln 21 to the corresponding value; If the mass is greater than the second preset mass, the central control unit uses the third speed correction coefficient to correct the speed of the rotary kiln 21 to the corresponding value.

[0035] Specifically, the central control unit determines whether there is a deviation in the temperature distribution on the outer wall of the rotary kiln 21 based on the variance of the temperature values ​​measured by each temperature detector 41. If the variance is greater than the first preset variance set in the central control unit, the central control unit determines that there is a deviation in the temperature distribution of the side wall of the rotary kiln 21, and determines the reason why the calcination of rare earth raw materials in the rotary kiln 21 does not meet the standard based on the distribution of each temperature value. If the variance is less than or equal to the first preset variance, the central control unit initially determines that there is no deviation in the temperature distribution of the sidewall of the rotary kiln 21, and determines that the reason why the calcination of rare earth raw materials in the rotary kiln 21 does not meet the standard is that the amount of fuel in the rotary kiln 21 is lower than the preset standard. Based on the difference between the first preset temperature value and the average temperature, the natural gas output of the heating unit 3 is adjusted to the corresponding value.

[0036] Please see Figure 4 The diagram shows a flowchart illustrating how the central control unit of this invention determines, based on the temperature distribution on the outer wall of the rotary kiln 21, the reasons why the calcination of rare earth raw materials in the rotary kiln 21 does not meet the standards. Under a fourth preset condition, the central control unit of this invention will plot temperature curves based on each temperature value and determine the temperature distribution on the outer wall of the rotary kiln 21 based on the temperature curves. Furthermore, based on the distribution of each temperature value, it will determine, for the second time, the reasons why the calcination of rare earth raw materials in the rotary kiln 21 does not meet the standards. If the number of peaks in the temperature curve is greater than or equal to the preset number set in the central control unit, the central control unit determines that the temperature distribution on the outer wall of the rotary kiln 21 is uniform, and determines for the second time that the reason why the calcination of rare earth raw materials in the rotary kiln 21 does not meet the standard is that the quality of rare earth raw materials in the rotary kiln 21 is higher than the preset standard. The central control unit adjusts the natural gas output of the heating unit 3 to the corresponding value according to the difference between the first preset temperature value and the average temperature value. If the number of peaks in the temperature curve is less than the preset number set in the central control unit, the central control unit determines that the temperature distribution on the outer wall of the rotary kiln 21 is uneven, and determines for the second time that the reason why the calcination of rare earth raw materials in the rotary kiln 21 does not meet the standard is that the quality of rare earth raw materials in the rotary kiln 21 is higher than the preset standard. The central control unit adjusts the moving speed of the conveying device 12 to the corresponding value according to the difference between the maximum temperature value and the minimum temperature value among the temperature values ​​so that the quality of rare earth raw materials conveyed by the conveying device 12 per unit time is reduced to the corresponding value. The fourth preset condition is that the variance is greater than the first preset variance.

[0037] Specifically, the central control unit records the difference between the maximum and minimum temperature values ​​as the temperature difference value, and adjusts the moving speed of the conveying device 12 to the corresponding value based on the temperature difference value: If the temperature difference is less than or equal to the first preset temperature difference value set in the central control unit, the central control unit uses the first preset speed adjustment coefficient to adjust the moving speed of the conveying device to the corresponding value. If the temperature difference is greater than the first preset temperature difference and less than or equal to the second preset temperature difference set in the central control unit, the central control unit uses the second preset speed adjustment coefficient to adjust the moving speed of the conveying device to the corresponding value. If the temperature difference is greater than the second preset temperature difference, the central control unit uses the first preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value.

[0038] Specifically, the central control unit records the difference between the first preset temperature value and the average temperature value as the low-temperature difference, and adjusts the natural gas output of the heating unit 3 to the rotary kiln 21 according to the low-temperature difference. If the low difference is less than or equal to the first preset low difference set in the central control unit, the central control unit uses the first preset air intake adjustment coefficient to adjust the natural gas output of the heating unit 3 to the corresponding value for the rotary kiln 21. If the low difference is greater than the first preset low difference and less than or equal to the second preset low difference set in the central control unit, the central control unit uses the second preset air intake adjustment coefficient to adjust the natural gas output of the heating unit 3 to the rotary kiln 21 to the corresponding value. If the low difference is greater than the second preset low difference, the central control unit uses the third preset air intake adjustment coefficient to adjust the natural gas output of the heating unit 3 to the corresponding value for the rotary kiln 21.

[0039] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A smart preparation system for rare earth oxides based on data self-monitoring, characterized in that, include: The feeding unit includes a material box for loading rare earth raw materials and a conveying device for conveying the rare earth raw materials in the material box. The feeding unit is also equipped with a dust collection device to recover the dust scattered by the conveying device during the conveying of rare earth raw materials. A rotary unit, which is located at the output end of the conveying device, is used to receive and calcine the rare earth raw materials output by the conveying device, including a rotary kiln for receiving and storing the rare earth raw materials and a drive device located below the rotary kiln to drive the rotary kiln to rotate. A heating unit, located at the output port of the rotary unit, is used to supply natural gas into the rotary kiln to regulate the temperature of the environment inside the rotary kiln by igniting the natural gas. The detection unit includes several temperature detectors evenly arranged at corresponding positions on the side wall of the rotary kiln to detect the surface temperature of the rotary kiln, and a mass detector arranged on the conveying device to detect the amount of rare earth raw materials conveyed by the conveying device. The discharge unit is connected to the rotary unit to receive the rare earth output from the rotary unit and to package the rare earth. The central control unit is connected to corresponding components in the feeding unit, the rotary unit, and the detection unit. It is used to determine whether the calcination of rare earth raw materials by the rotary kiln meets the preset standard based on the temperature values ​​measured by each temperature detector. When it is determined that the calcination of rare earth raw materials by the rotary kiln does not meet the preset standard, a secondary determination is made based on the amount of rare earth in the rotary kiln to determine whether the calcination of rare earth raw materials by the rotary kiln meets the preset standard. Alternatively, it can adjust the natural gas output of the heating unit or the rotation speed of the rotary kiln to the corresponding value based on the temperature measured by each temperature detector.

2. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 1, characterized in that, The central control unit controls each of the temperature detectors to detect the temperature at corresponding positions on the surface of the rotary kiln under a first preset condition. The central control unit calculates the average value of each temperature to determine whether the calcination of rare earth raw materials in the rotary kiln meets the preset standard. If the average temperature is greater than the third preset temperature value preset in the central control unit, the central control unit determines that the rotary kiln does not meet the standard for calcining rare earth raw materials, and controls the drive device to adjust the rotation speed of the rotary kiln to the corresponding value according to the difference between the average temperature and the third preset temperature. If the average temperature is less than or equal to the third preset temperature value and greater than the second preset temperature value preset in the central control unit, the central control unit initially determines that the calcination of rare earth raw materials by the rotary kiln meets the standard, and makes a second determination on whether the calcination of rare earth raw materials by the rotary kiln meets the standard based on the rare earth raw material conveying amount of the feeding unit per unit time. If the average temperature is less than or equal to the second preset temperature value and greater than the first preset temperature value preset in the central control unit, the central control unit determines that the calcination of rare earth raw materials by the rotary kiln meets the standard. If the average temperature is less than or equal to the first preset temperature value, the central control unit determines that the rotary kiln does not meet the standard for calcining rare earth raw materials, and adjusts the natural gas output of the heating unit to the corresponding value according to the difference between the first preset temperature value and the average temperature value. The first preset condition is the preset system running time.

3. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 2, characterized in that, The central control unit records the difference between the average temperature and the third preset temperature under the second preset condition as an excessively high difference, and controls the drive device to adjust the rotation speed of the rotary kiln to the corresponding value based on the excessively high difference. If the excessive height difference is less than or equal to the first preset excessive height difference set in the central control unit, the central control unit uses the first preset power adjustment coefficient to adjust the operating power of the drive device so that the rotation speed of the rotary kiln is adjusted to the first rotation speed; If the excessive height difference is greater than the first preset excessive height difference and less than or equal to the second preset excessive height difference set in the central control unit, the central control unit uses the second preset power adjustment coefficient to adjust the power of the drive device so that the rotation speed of the rotary kiln is adjusted to the second rotation speed; If the excessive height difference is greater than the second preset excessive height difference, the central control unit uses the third preset power adjustment coefficient to adjust the power of the drive device so that the rotation speed of the rotary kiln is adjusted to the third rotation speed; The second preset condition is that the average temperature is greater than the third preset temperature value.

4. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 3, characterized in that, Under a third preset condition, the central control unit controls the quality detector to detect the quality of the rare earth raw materials conveyed by the feeding device per unit time, and performs a secondary judgment on whether the calcination of the rare earth raw materials by the rotary kiln meets the standard based on the measured quality. If the mass is less than or equal to the first preset mass set in the central control unit, the central control unit makes a second determination that the calcination of rare earth raw materials by the rotary kiln meets the standard. If the mass is greater than the first preset mass and less than or equal to the second preset mass set in the central control unit, the central control unit determines for the second time that the calcination of rare earth raw materials by the rotary kiln does not meet the standard, and determines the reason why the calcination of rare earth raw materials by the rotary kiln does not meet the standard based on the temperature distribution of the side wall of the rotary kiln. If the mass is greater than the second preset mass, the central control unit determines for the second time that the rotary kiln does not meet the standard for calcining rare earth raw materials, and adjusts the natural gas output of the heating unit to the corresponding value according to the difference between the first preset temperature value and the average temperature value. The third preset condition is that the central control unit initially determines that the rotary kiln's calcination of rare earth raw materials meets the standards.

5. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 4, characterized in that, The central control unit corrects the adjusted rotational speed of the rotary kiln based on the mass of rare earth raw materials conveyed by the conveying device per unit time. If the mass is less than or equal to the first preset mass, the central control unit uses the first speed correction coefficient to correct the rotation speed of the rotary kiln to the corresponding value; If the mass is greater than the first preset mass and less than or equal to the second preset mass, the central control unit uses the second speed correction coefficient to correct the rotation speed of the rotary kiln to the corresponding value; If the mass is greater than the second preset mass, the central control unit uses a third speed correction coefficient to correct the rotation speed of the rotary kiln to the corresponding value.

6. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 5, characterized in that, The central control unit determines whether there is a deviation in the temperature distribution on the outer wall of the rotary kiln based on the variance of the temperature values ​​measured by each temperature detector: If the variance is greater than the first preset variance set in the central control unit, the central control unit determines that there is a deviation in the temperature distribution of the rotary kiln sidewall, and determines the reason why the rotary kiln does not meet the standard for calcining rare earth raw materials based on the distribution of each temperature value. If the variance is less than or equal to the first preset variance, the central control unit initially determines that there is no deviation in the temperature distribution of the rotary kiln sidewall, and determines that the reason why the calcination of rare earth raw materials in the rotary kiln does not meet the standard is that the amount of fuel in the rotary kiln is lower than the preset standard. Based on the difference between the first preset temperature value and the average temperature, the natural gas output of the heating unit is adjusted to the corresponding value.

7. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 6, characterized in that, Under the fourth preset condition, the central control unit will plot temperature curves based on each temperature value and determine the temperature distribution on the outer wall of the rotary kiln according to the temperature curves. Furthermore, based on the distribution of each temperature value, it will determine the reasons why the rotary kiln's calcination of rare earth raw materials does not meet the standards. If the number of peaks in the temperature curve is greater than or equal to the preset number set in the central control unit, the central control unit determines that the temperature distribution on the outer wall of the rotary kiln is uniform, and determines for the second time that the reason why the calcination of rare earth raw materials in the rotary kiln does not meet the standard is that the quality of rare earth raw materials in the rotary kiln is higher than the preset standard. The central control unit adjusts the natural gas output of the heating unit to the corresponding value according to the difference between the first preset temperature value and the average temperature value. If the number of peaks in the temperature curve is less than the preset number set in the central control unit, the central control unit determines that the temperature distribution on the outer wall of the rotary kiln is uneven, and determines for the second time that the reason why the calcination of rare earth raw materials in the rotary kiln does not meet the standard is that the quality of rare earth raw materials in the rotary kiln is higher than the preset standard. The central control unit adjusts the moving speed of the conveying device to the corresponding value according to the difference between the maximum temperature value and the minimum temperature value among the temperature values, so that the quality of rare earth raw materials conveyed by the conveying device per unit time is reduced to the corresponding value. The fourth preset condition is that the variance is greater than the first preset variance.

8. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 6, characterized in that, The central control unit records the difference between the maximum and minimum temperature values ​​as the temperature difference value, and adjusts the moving speed of the conveying device to the corresponding value based on the temperature difference value. If the temperature difference value is less than or equal to the first preset temperature difference value set in the central control unit, the central control unit uses the first preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value. If the temperature difference value is greater than the first preset temperature difference value and less than or equal to the second preset temperature difference value set in the central control unit, the central control unit uses the second preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value. If the temperature difference value is greater than the second preset temperature difference value, the central control unit uses the first preset speed adjustment coefficient to adjust the moving speed of the material conveying device to the corresponding value.

9. The intelligent rare earth oxide preparation system based on data self-monitoring according to claim 7, characterized in that, The central control unit records the difference between the first preset temperature value and the average temperature value as the low-temperature difference, and adjusts the natural gas output of the heating unit for the rotary kiln to the corresponding value based on the low-temperature difference. If the low difference is less than or equal to the first preset low difference set in the central control unit, the central control unit uses the first preset air intake adjustment coefficient to adjust the natural gas output of the heating unit for the rotary kiln to the corresponding value; If the under-low difference is greater than the first preset under-low difference and less than or equal to the second preset under-low difference set in the central control unit, the central control unit uses the second preset air intake adjustment coefficient to adjust the natural gas output of the heating unit for the rotary kiln to the corresponding value. If the excessively low difference is greater than the second preset excessively low difference, the central control unit uses the third preset air intake adjustment coefficient to adjust the natural gas output of the heating unit for the rotary kiln to the corresponding value.

10. The intelligent rare earth oxide preparation system based on data self-monitoring according to any one of claims 1-9, characterized in that, The rare earth raw material is rare earth carbonate or rare earth oxalate.

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