Environment-friendly process for recycling tin powder from waste electronic products

Abstract

The invention relates to the technical field of tin recovery in waste electronic products, particularly provides an environment-friendly process for recovering tin powder by using waste electronic products, and aims to solve the problems of low tin recovery efficiency, high energy consumption and difficulty in ensuring the purity in the prior art. The method realizes high-efficiency and high-purity recovery of tin in waste electronic products, adopts an advanced temperature sensor to monitor the evaporation rate of tin, and can adjust the power output of heating equipment in real time and ensure high-efficiency evaporation and condensation of tin in combination with heating power analysis, so that the method not only obviously improves the recovery rate and purity of tin, but also reduces the energy consumption. The method has the advantages that the energy consumption is effectively reduced, the waste gas emission is reduced, the obvious energy-saving and emission-reducing effects are achieved, the resource utilization rate in the waste electronic product treatment process is increased, the treatment cost is reduced, the positive effect on promoting the sustainable development of the electronic waste recovery industry is achieved, and the method is worthy of popularization and application. And the method has relatively high social benefits and market application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of tin recovery from waste electronic products, and in particular to an environmentally friendly process for recovering tin powder from waste electronic products. Background Art

[0002] With the rapid development of science and technology, the speed of electronic product replacement is accelerating, and the number of waste electronic products is also exploding. These waste electronic products contain a large number of valuable metal resources, such as tin, copper, gold, etc. Among them, tin has received special attention due to its wide range of applications and high recycling value. As an important metal resource, tin is mainly used for welding in the manufacture of electronic products, but the tin in waste electronic products is often mixed with other metals and non-metallic materials, which makes the recycling of tin a complex technical problem. Therefore, the study of efficient tin recovery technology for waste electronic products is of great significance to protecting the environment and saving resources. At present, the tin recovery technology in waste electronic products mainly includes several main methods such as physical separation, chemical leaching and heat treatment. Each method has its applicable scenarios and limitations.

[0003] Existing tin recovery technologies for waste electronic products mainly include physical separation, chemical leaching and heat treatment. Physical separation is a simple and direct method that separates tin from waste electronic products by means of crushing, screening and the like. The advantages of this method are simple operation and low cost, but the recovery rate is not high, especially for fine particles. The separation effect is poor, resulting in low recovery efficiency. Chemical leaching uses chemical agents to dissolve tin and then extracts it by precipitation and other means. This method can effectively improve the recovery rate of tin, but the use of chemical agents may cause pollution to the environment, and subsequent treatment is required to neutralize the residual harmful substances, increasing the cost of recovery. Heat treatment separates tin from other impurities by high-temperature smelting. This method has high recovery efficiency and good tin quality, but high energy consumption and strict temperature control requirements, otherwise it will affect the purity of the final product. In summary, although the existing technologies have their own characteristics, there are still many problems in practical applications, such as low recovery rate, high energy consumption, environmental pollution, etc., which provides a broad space for the development of new technologies.

[0004] In order to solve the above problems, the present invention proposes a new environmentally friendly process for recycling tin powder from waste electronic products. The process comprehensively considers factors such as heating power and evaporation rate. Through precise control of these key parameters, not only the recovery efficiency is improved, but also the quality of tin is significantly improved. The core of the present invention is to realize the automated management of the heating process, and the heating power can be dynamically adjusted according to real-time evaporation rate data to ensure that the evaporation process is carried out under the best condition, thereby reducing energy consumption and improving the recovery rate. By continuously monitoring the evaporation rate of the solution, it is ensured that it remains within an ideal range. In addition, the present invention also adopts a special pretreatment method to improve the recyclability of tin in waste electronic products and reduce the complexity of subsequent processing steps. Through these innovative designs, the present invention not only improves the recovery efficiency and quality of tin, but also effectively reduces energy consumption and environmental pollution, providing a more economical and environmentally friendly solution for the recovery of tin from waste electronic products. Summary of the invention

[0005] The purpose of the present invention is to provide an environmentally friendly process for recycling tin powder using waste electronic products, and an innovative solution is proposed for the efficient recovery of tin in waste electronic products. The solution continuously monitors the evaporation rate of the solution to ensure that it is maintained within an ideal range, and provides data support for optimizing the evaporation rate by analyzing the relationship between the heating power and the evaporation rate. Then, the specific impact of the change in heating power on the evaporation rate is further analyzed, and the heating strategy is optimized on this basis. Finally, according to the correlation analysis results between the heating power and the evaporation rate, the heating power is automatically adjusted to ensure that the evaporation rate is stable at an optimal level, thereby improving the recovery efficiency and quality of tin in waste electronic products, while reducing energy consumption and environmental pollution. The organic combination of this series of modules realizes the intelligent management of the heating process, improves the recovery efficiency, and reduces the complexity of subsequent processing steps, providing a more economical and environmentally friendly new method for the recovery of tin from waste electronic products to solve the above-mentioned background problems.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An environmentally friendly process for recycling tin powder from waste electronic products, comprising:

[0008] Calculate the evaporation rate of the solution and compare it with the predetermined range to generate an abnormal or normal signal;

[0009] Based on the abnormal evaporation rate signal, the heating power is analyzed and compared with the normal range to generate an abnormal or normal signal;

[0010] Analyze the correlation between heating power and evaporation rate to generate a positive or negative signal of heating effect;

[0011] Based on the heating influence signal and the target evaporation rate, the heating power is adjusted to ensure a stable evaporation rate.

[0012] As a further solution of the present invention: the process of calculating the evaporation rate of the solution is:

[0013] Divide the solution evaporation process into a number of time subunits of equal length;

[0014] Get the mass of the solution when the time subunit is in the middle moment, recorded as unit mass m;

[0015] Process all unit masses to obtain unit mass groups;

[0016] Based on the unit mass group, the difference between the initial mass of the solution and the unit mass is calculated to obtain the mass change of the solution;

[0017] The evaporation rate of the solution is calculated by calculating the ratio of the mass change to the total time between the initial time and the time subunit.

[0018] As a further solution of the present invention, the process of comparing the evaporation rate of the solution with a predetermined range and generating an abnormal or normal signal is as follows:

[0019] Compare the evaporation rate Rs with the normal range of evaporation rate;

[0020] If the evaporation rate Rs is greater than the maximum value of the normal range of the evaporation rate, or the evaporation rate Rs is less than the minimum value of the normal range of the evaporation rate, an abnormal evaporation rate signal is generated;

[0021] If the evaporation rate Rs is greater than or equal to the minimum value of the normal range of the evaporation rate, and less than or equal to the maximum value of the normal range of the evaporation rate, a normal evaporation rate signal is generated.

[0022] As a further solution of the present invention: Based on the abnormal evaporation rate signal, the process of analyzing the heating power is:

[0023] Collect the unit temperature value of the solution when the time subunit is in the middle moment;

[0024] The difference between the unit temperature value of the solution and the initial temperature of the solution before heating is calculated to obtain the change in the solution temperature;

[0025] The change in the solution is multiplied by the specific heat capacity of the solution to obtain the product value;

[0026] The product of the change in the solution and the specific heat capacity of the solution is multiplied by the mass of the solution to obtain the energy value absorbed by the solution during the heating process;

[0027] Obtain the total heating time of the solution from the beginning of heating to the unit temperature value of the solution, and record it as the heating time of the solution;

[0028] The energy value absorbed by the solution during the heating process is calculated by ratio to the heating time to obtain the heating power of the solution.

[0029] As a further solution of the present invention: the process of comparing the heating power with the normal range and generating an abnormal or normal signal is as follows:

[0030] Compare the heating power with the normal range of heating power;

[0031] If the heating power is greater than the maximum value of the normal range of the heating power, or the heating power is less than the minimum value of the normal range of the heating power, a heating power abnormality signal is generated;

[0032] If the heating power is less than or equal to the maximum value of the normal range of the heating power, and the heating power is greater than or equal to the minimum value of the normal range of the heating power, a normal heating power signal is generated.

[0033] As a further solution of the present invention: the process of analyzing the correlation between heating power and evaporation rate is:

[0034] Obtain evaporation rate measurements at different heating powers;

[0035] For all heating powers P and corresponding evaporation rates R, the data points (P i ,R i );

[0036] Where i is the number of data points, i = 1, 2, ..., n;

[0037] For all data points (P i ,R i ) is processed to obtain a data set of heating power and evaporation rate;

[0038] Based on the data set of heating power and evaporation rate, the correlation between heating power and evaporation rate is analyzed, specifically:

[0039] The correlation value xs between heating power and evaporation rate is obtained by calculation.

[0040] As a further solution of the present invention: comparing the absolute value of the correlation value xs with a correlation threshold;

[0041] If the absolute value of the correlation value xs is less than the correlation threshold, it means that there is no correlation between the heating power and the evaporation rate, and a non-correlation signal is generated;

[0042] If the absolute value of the correlation value xs is greater than or equal to the correlation threshold, it indicates that there is a correlation between the heating power and the evaporation rate, and a strong correlation signal is generated.

[0043] As a further solution of the present invention: based on the strong correlation signal, a plane coordinate system is constructed with the heating rate as the x-axis and the evaporation rate as the y-axis;

[0044] Each data point (P i ,R i ) is plotted in a plane coordinate system to obtain a scatter plot of heating power and evaporation rate;

[0045] Fit all data points in the scatter plot to get a best fit line, specifically:

[0046] The coefficient b1 of heating power and evaporation rate is obtained by calculation;

[0047] Based on the coefficient b1 of the heating power and the evaporation rate, the coefficient b2 of the heating power and the evaporation rate is obtained by calculation;

[0048] Based on the coefficient b1 and the coefficient b2, the best fitting line with respect to the heating power and the evaporation rate is obtained by calculation.

[0049] As a further solution of the present invention: performing identification analysis on the best fit line;

[0050] If the slope of the best fit line is downward, a negative heating effect signal is generated;

[0051] If the slope of the best fit line is upward, a positive signal for heating effect is generated.

[0052] As a further solution of the present invention: based on the heating influence positive signal, the heating power is regulated, specifically:

[0053] Obtain the real-time evaporation rate of the solution;

[0054] The target evaporation rate and the real-time evaporation rate are calculated to obtain a deviation value between the target evaporation rate and the real-time evaporation rate;

[0055] If the deviation between the target evaporation rate and the real-time evaporation rate is greater than 0, increase the evaporation rate;

[0056] If the deviation between the target evaporation rate and the real-time evaporation rate is less than 0, the evaporation rate is reduced;

[0057] The deviation between the target evaporation rate and the real-time evaporation rate is calculated by difference with the coefficient b1 of the heating power and the evaporation rate to obtain the difference between the deviation and the coefficient b1;

[0058] The difference between the deviation value and the coefficient b1 is calculated by ratio with the coefficient b1 of the heating power and the evaporation rate to obtain the heating power adjustment amount;

[0059] If the heating power adjustment amount is greater than 0, increase the heating power;

[0060] If the heating power adjustment amount is less than 0, reduce the heating power;

[0061] The heating power of the device is adjusted according to the heating power adjustment amount.

[0062] Beneficial effects of the present invention:

[0063] (1) The present invention proposes a highly efficient method for recovering tin from waste electronic products, which significantly improves the recovery rate and purity of tin from waste electronic products. Specifically, by real-time monitoring of the evaporation rate of the solution, it is ensured that it is maintained within a predetermined ideal range, thereby avoiding tin loss or purity reduction caused by too fast or too slow evaporation rate. By analyzing the data on the relationship between heating power and evaporation rate, the heating process is made more accurate and controllable, which helps to optimize the evaporation rate, thereby ensuring the efficiency of the tin recovery process. The correlation analysis further studies the influence of heating power changes on the evaporation rate, providing a scientific basis for optimizing the heating strategy. Under the combined effect of these measures, tin from waste electronic products can be separated more efficiently, which not only significantly improves the recovery rate, but also effectively ensures the high purity of the recovered tin due to the precise control of heating conditions during the entire recovery process.

[0064] (2) Another significant advantage of the present invention is that it can effectively reduce energy consumption and environmental pollution while improving the recovery efficiency of tin in waste electronic products. Traditional tin recovery methods often require a large amount of heat energy input to complete the smelting process, which not only consumes a large amount of energy but also produces a large amount of harmful gas emissions. The present invention can automatically adjust the heating power according to the change of evaporation rate by dynamically adjusting the heating power, thereby avoiding unnecessary heat waste. This intelligent heating power management method not only reduces the overall energy demand, but also reduces greenhouse gas emissions, which is in line with the current global sustainable development goals. In addition, since the heating conditions are precisely controlled during the recovery process, the generation of by-products is also effectively reduced, reducing the environmental burden that may be generated during the subsequent treatment process. Therefore, the present invention not only improves the recovery efficiency of tin in waste electronic products, but also makes important contributions to energy conservation and emission reduction, and has important environmental significance and social value.

[0065] (3) The present invention not only has significant advantages in terms of technology and environmental protection, but also greatly improves the economic benefits and social influence of tin recovery from waste electronic products. First, at the economic level, since the present invention can significantly improve the recovery rate and purity of tin, reduce the demand for raw materials, and thus reduce production costs, in addition, due to the use of energy-saving and efficient recycling technology, energy consumption is reduced, and operating costs are further reduced. These improvements in economic benefits mean higher profit margins for waste electronic product recycling companies and promote the healthy development of the industry. Secondly, in terms of social influence, the application of the present invention helps to reduce the pollution of waste electronic products to the environment and protect natural resources, which is of great significance for raising the public's environmental awareness and promoting green consumption. At the same time, by promoting this efficient recycling technology, more companies and individuals can be encouraged to participate in the recycling of waste electronic products, forming a virtuous circle and jointly promoting the development of the circular economy. In summary, the present invention not only brings economic benefits to enterprises, but also brings positive impacts to society. It is a technical solution with great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The present invention will be further described below in conjunction with the accompanying drawings.

[0067] Figure 1 This is a flow chart of the specific steps of an environmentally friendly process for recycling tin powder using waste electronic products of the present invention;

[0068] Figure 2 It is a flow chart of generating normal and abnormal signals of heating power in the present invention;

[0069] Figure 3 It is a flow chart of generating normal and abnormal signals of evaporation rate in the present invention. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] Example 1

[0072] See also Figure 1 As shown, the present invention is an environmentally friendly process for recycling tin powder using waste electronic products, comprising the following steps:

[0073] The whole evaporation process is divided into multiple sub-units at equal time intervals;

[0074] Record the mass of the solution at the middle moment of each time subunit;

[0075] Collating solution quality data for all time subunits;

[0076] Using the initial mass and the mass at each time point, calculate the mass change;

[0077] Calculate the evaporation rate based on the mass change and time interval;

[0078] Compare the calculated evaporation rate with a preset normal range to determine whether the evaporation rate is normal;

[0079] Record the solution temperature at the middle moment of each time subunit;

[0080] Compare with the initial temperature to get the temperature change;

[0081] Using the specific heat capacity and mass of the solution, calculate the energy absorbed by the solution during heating;

[0082] Record the total heating time from the start of heating to the end of each time subunit;

[0083] Using the absorbed energy and heating time, the heating power is calculated;

[0084] Compare the heating power with the preset normal range to determine whether the heating power is normal;

[0085] Record the evaporation rate at different heating powers;

[0086] Arrange the data points of heating power and evaporation rate;

[0087] Using statistical methods, the correlation value between heating power and evaporation rate is calculated;

[0088] Compare the correlation value with a threshold value to determine whether there is a correlation between the two;

[0089] Draw a scatter plot of heating power and evaporation rate in a two-dimensional coordinate system;

[0090] Using mathematical methods, the best fitting line between heating power and evaporation rate is fitted;

[0091] The slope of the best fit line can be used to determine whether the heating power and evaporation rate are positively or negatively correlated;

[0092] Monitor current evaporation rate;

[0093] Compare the real-time evaporation rate with the target evaporation rate to obtain a deviation value;

[0094] Calculate the adjustment amount of heating power according to the deviation value and the coefficient of heating power and evaporation rate;

[0095] Adjust the heating power according to the heating power adjustment amount;

[0096] Continue to monitor the evaporation rate and solution temperature after adjustment and repeat the adjustment steps if necessary.

[0097] Example 2

[0098] Divide the solution evaporation process into a number of time subunits of equal length;

[0099] Get the mass of the solution when the time subunit is in the middle moment, recorded as unit mass m;

[0100] Process all unit masses to obtain unit mass groups;

[0101] Based on the unit mass group, the formula Δm=m 0 -m(t) is used to calculate the mass change of the solution Δm;

[0102] Among them, m 0 is the initial mass of the solution, m(t) is the mass of the solution at time t, t is the sequence number of the time subunit, t = 1, 2, ..., t;

[0103] Based on the mass change Δm, the formula The evaporation rate Rs of the solution is calculated;

[0104] Wherein, Δt is the time interval, i.e., the time interval between time subunits t and ti, i is the number of time subunit sequences from time t to the initial time, i = 1, 2, ..., i;

[0105] Compare the evaporation rate Rs with the normal range of evaporation rate;

[0106] If the evaporation rate Rs is greater than the maximum value of the normal range of the evaporation rate, or the evaporation rate Rs is less than the minimum value of the normal range of the evaporation rate, it means that the evaporation rate of the solution is abnormal, and an abnormal evaporation rate signal is generated;

[0107] If the evaporation rate Rs is greater than or equal to the minimum value of the normal range of the evaporation rate, and less than or equal to the maximum value of the normal range of the evaporation rate, it means that the evaporation rate of the solution is normal, and a normal evaporation rate signal is generated;

[0108] It should be noted that analyzing whether the evaporation rate is abnormal is crucial for the process of recycling tin powder from scrap electronic products. This can not only ensure product quality and avoid the reduction of product purity or damage to the crystal form due to overheating; it can also improve process efficiency and optimize evaporation conditions by adjusting parameters such as heating power and environmental conditions to reduce energy consumption; at the same time, it can prevent safety accidents and avoid problems such as boiling and splashing of solutions caused by too fast evaporation; extend equipment life and reduce wear and tear inside the equipment caused by large temperature fluctuations; and help protect the environment, reduce harmful gas emissions and waste of resources. Through real-time monitoring and data analysis, evaporation conditions can be adjusted in a timely manner to ensure that the evaporation rate remains within the ideal range, thereby achieving the goals of effective resource recovery and environmental protection.

[0109] Example 3

[0110] Based on the abnormal evaporation rate signal of the above solution, since the abnormal heating power during the evaporation process of the solution will lead to the abnormal evaporation rate during the evaporation process of the solution, it is analyzed and judged whether the abnormal evaporation rate during the evaporation process of the solution is related to the abnormal heating power during the evaporation process of the solution. If there is a relationship of the influence of the heating power, it is convenient to adjust the heating power in time during the subsequent solution evaporation process, reduce the impact of the solution evaporation process on the product quality, effectively maintain the stability of the evaporation rate during the evaporation process of the solution, and then optimize the tin powder recovery process. Specifically:

[0111] Collect the unit temperature value of the solution when the time subunit is in the middle moment;

[0112] The difference between the unit temperature value of the solution and the initial temperature of the solution before heating is calculated to obtain the change in the solution temperature;

[0113] The change in the solution is multiplied by the specific heat capacity of the solution to obtain the product value;

[0114] The energy absorbed by the solution during the heating process is calculated by multiplying the product of the change in the solution and the specific heat capacity of the solution by the mass of the solution.

[0115] Obtain the total heating time of the solution from the beginning of heating to the unit temperature value of the solution, and record it as the heating time of the solution;

[0116] The energy absorbed by the solution during the heating process is calculated by ratio to the heating time to obtain the heating power of the solution;

[0117] Compare the heating power with the normal range of heating power;

[0118] If the heating power is greater than the maximum value of the normal range of the heating power, or the heating power is less than the minimum value of the normal range of the heating power, it means that the heating power is abnormal, and a heating power abnormal signal is generated;

[0119] If the heating power is less than or equal to the maximum value of the normal range of the heating power, and the heating power is greater than or equal to the minimum value of the normal range of the heating power, it means that the heating power is normal, and a normal heating power signal is generated;

[0120] It should be noted that in the environmentally friendly process of recycling tin powder from waste electronic products, the analysis and dynamic regulation of heating power can bring many advantages and functions. First, this helps to improve energy efficiency and avoid energy waste by precisely controlling the heating power; second, it can ensure product quality, ensure temperature stability during the evaporation of the solution, and avoid product quality degradation due to abnormal temperature; in addition, it can extend equipment life, reduce equipment wear, and reduce maintenance costs; at the same time, through precise regulation of heating power, the evaporation rate can be optimized and production efficiency can be improved; more importantly, this helps to reduce energy consumption, reduce carbon emissions and other pollutants, and is beneficial to environmental protection; finally, through the analysis of heating power, the best parameter settings for the process can be obtained, the process conditions can be continuously optimized, and the level of automation and production flexibility can be improved. In short, through the analysis and regulation of heating power, not only the efficiency and product quality of the environmentally friendly process of recycling tin powder from waste electronic products can be improved, but also energy consumption and production costs can be reduced, and the safety and sustainability of the entire process can be improved.

[0121] Example 4

[0122] Based on the above abnormal evaporation rate signal and abnormal heating power signal, the evaporation rate measurement values ​​under different heating powers are obtained, and the relationship between the evaporation rate and the heating power is analyzed. Specifically:

[0123] In a specific embodiment:

[0124] Obtain evaporation rate measurements at different heating powers;

[0125] For all heating powers P and corresponding evaporation rates R, the data points (P i ,R i );

[0126] Where i is the number of data points, i = 1, 2, ..., n;

[0127] For all data points (P i ,R i ) is processed to obtain a data set of heating power and evaporation rate;

[0128] Based on the data set of heating power and evaporation rate, the correlation between heating power and evaporation rate is analyzed, specifically:

[0129] By formula The correlation value xs between the heating power and the evaporation rate is calculated;

[0130] Compare the absolute value of the correlation value xs with the correlation threshold;

[0131] If the absolute value of the correlation value xs is less than the correlation threshold, it means that there is no correlation between the heating power and the evaporation rate, and a non-correlation signal is generated;

[0132] If the absolute value of the correlation value xs is greater than or equal to the correlation threshold, it means that there is a correlation between the heating power and the evaporation rate, and a strong correlation signal is generated;

[0133] Based on the strong correlation signal, a plane coordinate system is constructed with the heating rate as the x-axis and the evaporation rate as the y-axis;

[0134] Each data point (P i ,R i ) is plotted in a plane coordinate system to obtain a scatter plot of heating power and evaporation rate;

[0135] Fit all data points in the scatter plot to get a best fit line, specifically:

[0136] By formula The coefficient b1 of heating power and evaporation rate is calculated;

[0137] Based on the coefficient b1 of heating power and evaporation rate, the formula The coefficient b2 of heating power and evaporation rate is calculated;

[0138] Based on the coefficient b1 and the coefficient b2, the best fitting line about the heating power and the evaporation rate is calculated by the formula R=b1×P+b2;

[0139] Identify and analyze the best fit line;

[0140] If the slope of the best fit line is downward, it indicates that there is a strong negative correlation between heating power and evaporation rate, that is, as the heating rate increases, the evaporation rate decreases, generating a negative signal of heating effect;

[0141] If the slope of the best fit line is upward, it indicates that there is a strong positive correlation between heating power and evaporation rate, that is, as the heating rate increases, the evaporation rate increases, generating a positive signal of heating effect;

[0142] It should be noted that the correlation analysis between heating power and evaporation rate has many advantages and functions. This analysis can help us optimize process parameters and find the most suitable heating power setting to achieve the ideal evaporation rate, thereby reducing energy waste and improving production efficiency. It enhances process control capabilities, allowing the evaporation process to be accurately controlled by adjusting the heating power, which is particularly important for applications that require strict control of the evaporation rate. In addition, correlation analysis can predict the evaporation rate under different heating powers based on existing data, thereby reducing the number of experiments and costs. By monitoring the relationship between heating power and evaporation rate, abnormal conditions can be discovered in time and measures can be taken to prevent equipment damage or production accidents, thereby improving product quality. This analysis also supports theoretical research, helps to deepen the understanding of the evaporation mechanism, and can be applied to the design and optimization of evaporation systems, realize automated control, improve safety, evaluate environmental impact, and expand application areas. In short, the correlation analysis between heating power and evaporation rate can not only help us manage the evaporation process more effectively, but also promote technological progress and the development of scientific research.

[0143] Example 5

[0144] Based on the heating impact positive signal, the heating power is regulated, specifically:

[0145] In a specific embodiment:

[0146] Obtain the real-time evaporation rate of the solution;

[0147] The target evaporation rate and the real-time evaporation rate are calculated to obtain a deviation value ΔR between the target evaporation rate and the real-time evaporation rate;

[0148] If the deviation between the target evaporation rate and the real-time evaporation rate is greater than 0, it means that the evaporation rate of the solution is too low and the evaporation rate needs to be increased;

[0149] If the deviation between the target evaporation rate and the real-time evaporation rate is less than 0, it means that the evaporation rate of the solution is too high and the evaporation rate needs to be reduced;

[0150] The difference between the deviation value ΔR between the target evaporation rate and the real-time evaporation rate and the coefficient b1 of the heating power and the evaporation rate is calculated to obtain the difference between the deviation value ΔR and the coefficient b1;

[0151] The difference between the deviation value ΔR and the coefficient b1 is calculated by ratio with the coefficient b1 of the heating power and the evaporation rate to obtain the heating power adjustment amount;

[0152] If the heating power adjustment amount is greater than 0, it means that the heating power of the solution is too low and the heating power needs to be increased;

[0153] If the heating power adjustment amount is less than 0, it means that the heating power of the solution is too high and the heating power needs to be reduced;

[0154] Adjust the heating power according to the heating power adjustment amount;

[0155] After adjusting the heating power, continue to monitor the evaporation rate and solution temperature;

[0156] If the evaporation rate is still abnormal, repeat the above steps again and adjust the heating power to ensure that the evaporation rate is stable within the target range;

[0157] It should be noted that adjusting the heating power plays an important role and has advantages in the environmentally friendly process of recycling tin powder from waste electronic products. By precisely controlling the heating power, the evaporation rate can be kept within the ideal range, avoiding product quality problems caused by too fast or too slow evaporation rates, thereby improving product quality. Appropriate heating power can also ensure that the solution evaporates at an appropriate temperature, avoiding overheating of the solution caused by excessive evaporation, while reducing energy waste and achieving an energy-saving and efficient evaporation process. In addition, dynamic adjustment of the heating power helps to reduce the risk of equipment failure due to overheating or overload, reduce maintenance costs, and improve production efficiency and automation levels. This method is also highly adaptable and can flexibly adjust the heating power according to different solution characteristics and environmental conditions. It is suitable for various types of waste electronic products. By reducing energy consumption and waste generation, this method helps to reduce the impact on the environment and also improves the safety of the production process. In summary, adjusting the heating power can not only improve product quality and production efficiency, but also reduce energy consumption and maintenance costs, and reduce the impact on the environment. It is an indispensable key link in the environmentally friendly process of recycling tin powder from waste electronic products.

[0158] Working principle of the invention: The invention proposes a highly efficient recovery method of tin in waste electronic products, which significantly improves the recovery rate and purity of tin in waste electronic products. Specifically, by real-time monitoring of the evaporation rate of the solution, it is ensured that it is maintained within a predetermined ideal range, thereby avoiding tin loss or purity reduction caused by too fast or too slow evaporation rate. By analyzing the data of the relationship between heating power and evaporation rate, the heating process is made more accurate and controllable, which helps to optimize the evaporation rate, thereby ensuring the high efficiency of the tin recovery process. The correlation analysis further studies the influence of heating power changes on the evaporation rate, and provides a scientific basis for optimizing the heating strategy. Under the joint action of these measures, the tin in the waste electronic products can be separated more efficiently, which not only significantly improves the recovery rate, but also effectively ensures the high purity of the recovered tin due to the precise control of the heating conditions in the entire recovery process.

[0159] Another significant advantage of the present invention is that it can effectively reduce energy consumption and environmental pollution while improving the recovery efficiency of tin in waste electronic products. Traditional tin recovery methods often require a large amount of heat energy input to complete the smelting process, which not only consumes a lot of energy, but also produces more harmful gas emissions. The present invention can automatically adjust the heating power according to the change of evaporation rate by dynamically adjusting the heating power, avoiding unnecessary heat waste. This intelligent heating power management method not only reduces the overall energy demand, but also reduces greenhouse gas emissions, which is in line with the current global sustainable development goals. In addition, since the heating conditions are precisely controlled during the recovery process, the generation of by-products is also effectively reduced, reducing the environmental burden that may be generated during the subsequent treatment process. Therefore, the present invention not only improves the recovery efficiency of tin in waste electronic products, but also makes important contributions to energy conservation and emission reduction, and has important environmental significance and social value.

[0160] The present invention not only has significant advantages in terms of technology and environmental protection, but also greatly improves the economic benefits and social influence of tin recovery from waste electronic products. First, at the economic level, since the present invention can significantly improve the recovery rate and purity of tin, reduce the demand for raw materials, and thus reduce production costs, in addition, due to the use of energy-saving and efficient recycling technology, energy consumption is reduced, and operating costs are further reduced. These improvements in economic benefits mean higher profit margins for waste electronic product recycling companies and promote the healthy development of the industry. Secondly, in terms of social influence, the application of the present invention helps to reduce the pollution of the environment by waste electronic products and protect natural resources, which is of great significance for raising the public's environmental awareness and promoting green consumption. At the same time, by promoting this efficient recycling technology, more companies and individuals can be encouraged to participate in the recycling of waste electronic products, forming a virtuous circle and jointly promoting the development of the circular economy. In summary, the present invention not only brings economic benefits to enterprises, but also brings positive impacts to society. It is a technical solution with great promotion value.

[0161] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An environmentally friendly process for recycling tin powder from waste electronic products, characterized in that: include: Calculate the evaporation rate of the solution and compare it with the predetermined range to generate an abnormal or normal signal; Based on the abnormal evaporation rate signal, the heating power is analyzed and compared with the normal range to generate an abnormal or normal signal; Analyze the correlation between heating power and evaporation rate to generate a positive or negative signal of heating effect; Based on the heating influence signal and the target evaporation rate, the heating power is adjusted to ensure a stable evaporation rate.

2. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 1, characterized in that: The process for calculating the evaporation rate of a solution is: Divide the solution evaporation process into a number of time subunits of equal length; Get the mass of the solution when the time subunit is in the middle moment, and record it as the unit mass; Process all unit masses to obtain unit mass groups; Based on the unit mass group, the difference between the initial mass of the solution and the unit mass is calculated to obtain the mass change of the solution; The evaporation rate of the solution is calculated by calculating the ratio of the mass change to the total time between the initial time and the time subunit.

3. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 2, characterized in that: The process of comparing the solution evaporation rate with the predetermined range and generating abnormal or normal signals is as follows: Compare the evaporation rate Rs with the normal range of evaporation rate; If the evaporation rate Rs is greater than the maximum value of the normal range of the evaporation rate, or the evaporation rate Rs is less than the minimum value of the normal range of the evaporation rate, an abnormal evaporation rate signal is generated; If the evaporation rate Rs is greater than or equal to the minimum value of the normal range of the evaporation rate, and less than or equal to the maximum value of the normal range of the evaporation rate, a normal evaporation rate signal is generated.

4. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 3, characterized in that: Based on the abnormal evaporation rate signal, the process of analyzing the heating power is: Collect the unit temperature value of the solution when the time subunit is in the middle moment; The difference between the unit temperature value of the solution and the initial temperature of the solution before heating is calculated to obtain the change in the solution temperature; The change in the solution is multiplied by the specific heat capacity of the solution to obtain the product value; The product of the change in the solution and the specific heat capacity of the solution is multiplied by the mass of the solution to obtain the energy value absorbed by the solution during the heating process; Obtain the total heating time of the solution from the beginning of heating to the unit temperature value of the solution, and record it as the heating time of the solution; The energy value absorbed by the solution during the heating process is calculated by ratio to the heating time to obtain the heating power of the solution.

5. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 4, characterized in that: The process of comparing the heating power with the normal range and generating abnormal or normal signals is as follows: Compare the heating power with the normal range of heating power; If the heating power is greater than the maximum value of the normal range of the heating power, or the heating power is less than the minimum value of the normal range of the heating power, a heating power abnormality signal is generated; If the heating power is less than or equal to the maximum value of the normal range of the heating power, and the heating power is greater than or equal to the minimum value of the normal range of the heating power, a normal heating power signal is generated.

6. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 5, characterized in that: The process of analyzing the correlation between heating power and evaporation rate is: Obtain evaporation rate measurements at different heating powers; For all heating powers P and corresponding evaporation rates R, the data points (P i ,R i ); Where i is the number of data points, i = 1, 2, ..., n; For all data points (P i ,R i ) to obtain a data set of heating power and evaporation rate; Based on the data set of heating power and evaporation rate, the correlation between heating power and evaporation rate is analyzed, specifically: The correlation value xs between the heating power and the evaporation rate is calculated.

7. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 6, characterized in that: Compare the absolute value of the correlation value xs with the correlation threshold; If the absolute value of the correlation value xs is less than the correlation threshold, it means that there is no correlation between the heating power and the evaporation rate, and a non-correlation signal is generated; If the absolute value of the correlation value xs is greater than or equal to the correlation threshold, it indicates that there is a correlation between the heating power and the evaporation rate, and a strong correlation signal is generated.

8. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 7, characterized in that: Based on the strong correlation signal, a plane coordinate system is constructed with the heating rate as the x-axis and the evaporation rate as the y-axis; Each data point (P i ,R i ) is plotted in a plane coordinate system to obtain a scatter plot of heating power and evaporation rate; Fit all data points in the scatter plot to get a best fit line, specifically: The coefficient b1 of heating power and evaporation rate is calculated; Based on the coefficient b1 of the heating power and the evaporation rate, the coefficient b2 of the heating power and the evaporation rate is obtained by calculation; Based on the coefficient b1 and the coefficient b2, the best fitting line with respect to the heating power and the evaporation rate is obtained by calculation.

9. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 8, characterized in that: Identify and analyze the best fit line; If the slope of the best fit line is downward, a negative heating effect signal is generated; If the slope of the best fit line is upward, a positive signal for heating effect is generated.

10. The environmentally friendly process for recycling tin powder from waste electronic products according to claim 9, characterized in that: Based on the heating impact positive signal, the heating power is regulated, specifically: Obtain the real-time evaporation rate of the solution; The target evaporation rate and the real-time evaporation rate are calculated to obtain a deviation value between the target evaporation rate and the real-time evaporation rate; If the deviation between the target evaporation rate and the real-time evaporation rate is greater than 0, increase the evaporation rate; If the deviation between the target evaporation rate and the real-time evaporation rate is less than 0, the evaporation rate is reduced; The deviation between the target evaporation rate and the real-time evaporation rate is calculated by difference with the coefficient b1 of the heating power and the evaporation rate to obtain the difference between the deviation and the coefficient b1; The difference between the deviation value and the coefficient b1 is calculated by ratio with the coefficient b1 of the heating power and the evaporation rate to obtain the heating power adjustment amount; If the heating power adjustment amount is greater than 0, increase the heating power; If the heating power adjustment amount is less than 0, reduce the heating power; The heating power of the device is adjusted according to the heating power adjustment amount.

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