Workshop Visual Control System for Lithium Iron Phosphate Battery Recycling Production Line

Abstract

The invention relates to the field of acidification workshops, and is used to solve the problem that the acidification workshop cannot adapt to environmental changes or the acidification time is too long and the impurities increase due to the use of fixed parameter control during acidification recovery. The invention is specifically a workshop visualization control system, a waste gas monitoring unit, a central control platform, a dissolution analysis unit, a feeding control unit and an acid solution analysis unit of a lithium iron phosphate battery recycling production line. The invention collects the pH value of the acid solution in the battery acidification workshop, thereby realizing the detection of the pH value change, analyzes the pH value change of the acid solution, obtains the degree of acid consumption, calculates the dissolution amount according to the degree of acid consumption, counts the feeding amount, and comprehensively analyzes the feeding amount and the dissolution amount, thereby obtaining the actual acidification and dissolution ratio of the battery recycling material in the acidification workshop, thereby realizing the precise control of the acidification process.

Description

Technical Field

[0001] The present invention relates to the field of visual control of an acidification workshop, and in particular to a visual control system of a workshop of a lithium iron phosphate battery recycling processing production line. Background Art

[0002] The acidification workshop is mainly used to process waste lithium iron phosphate battery materials after pretreatment (such as disassembly, crushing, classification, etc.). Through the acidification reaction, the iron phosphate and other impurities in the battery materials can be dissolved, so as to facilitate the subsequent extraction and separation of valuable components and complete the recovery of valuable components in lithium iron phosphate batteries;

[0003] At present, in the existing acidification workshop process, it is necessary to send the pre-treated waste lithium iron phosphate battery materials into the acidification workshop, add an appropriate amount of acid solution, and carry out acid dissolution reaction at a certain temperature and pressure. In this process, iron phosphate and other impurities will be dissolved in the acid solution. The solution after acid dissolution needs to be treated with impurities to remove insoluble impurities and harmful components, which is usually achieved by filtering, precipitation, centrifugation and other methods. However, for the selection of the time and frequency of impurity removal, the existing process generally adopts the method of fixed parameter feeding amount and acidification time to operate. However, in the actual process, the environmental control effect of the acidification workshop is subject to the influence of the external environment. Once the environmental control of the acidification workshop deviates from the set standard process parameters, the acidification process will be affected. At the same time, due to the lack of visualization system in the acidification workshop in the prior art, the visualization degree of the acidification process is insufficient, so that the operator cannot intuitively understand the specific process of acidification, so that the fixed frequency feeding, acidification and impurity removal process deviates from the design parameters, resulting in the raw materials not being completely dissolved during impurity removal, causing waste of raw materials and environmental pollution or too long dissolution time resulting in excessive dissolution of impurities, which increases the difficulty of subsequent purification.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The present invention collects the pH value of acid solution in a battery acidification workshop, thereby realizing the detection of pH value changes, obtains the degree of acid solution consumption by analyzing the pH value changes of the acid solution, calculates the dissolution amount according to the degree of acid solution consumption, obtains the actual acidification and dissolution ratio of battery recycling materials in the acidification workshop by counting the feeding amount and comprehensively analyzing the feeding amount and the dissolution amount, and controls the acidification process according to the obtained actual acidification and dissolution ratio, thereby avoiding the acidification time being too long or too short during filtration, and solving the problem that the acidification workshop cannot adapt to environmental changes due to the use of fixed parameter control during acidification recovery, resulting in incomplete acidification or increased impurities due to the long acidification time, and proposes a workshop visualization control system for a lithium iron phosphate battery recycling processing production line.

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

[0007] The workshop visual control system of the lithium iron phosphate battery recycling processing production line includes an exhaust gas monitoring unit, which is used to collect statistics on the exhaust gas in the acidification process, analyze the exhaust gas generation distribution, and obtain the acid volatilization judgment result;

[0008] An acid analysis unit, which acquires the pH value of the acid and analyzes the degree of consumption of the acid;

[0009] A feeding control unit, which can obtain the amount of raw materials input and the time of input, and record them as the amount of raw materials to be dissolved and the feeding time;

[0010] A dissolution analysis unit, wherein the dissolution analysis unit obtains the degree of acid consumption, determines the degree of completeness of acid consumption and the degree of completion of acidification, and obtains the acidification dissolution amount, dissolution ratio and dissolution time;

[0011] The central control platform obtains the dissolution ratio, dissolution time and acidification dissolution amount for comprehensive analysis, and comprehensively analyzes the absolute speed and relative speed of the dissolution process to obtain the dissolution evaluation result.

[0012] As a preferred embodiment of the present invention, the acid analysis unit collects the acidification pool in the acidification workshop, obtains the pH value of the acid in the acidification pool, and records it as a real-time pH value P1. The acid analysis unit obtains a preset initial acid pH value P0, and calculates the acid consumption percentage HB through the formula. The acid consumption percentage is recorded as the acid consumption degree, and the acid consumption degree is sent to the dissolution analysis unit.

[0013] As a preferred embodiment of the present invention, after obtaining the acid consumption degree, the dissolution analysis unit compares the acid consumption degree with a set acid consumption threshold, and generates an acid consumption completion signal or an acid consumption remaining signal according to the comparison result;

[0014] The dissolution analysis unit sends an acid solution consumption remaining signal or an acid solution consumption completion signal to the central control platform.

[0015] As a preferred embodiment of the present invention, the dissolution analysis unit obtains a preset proportionality coefficient K, and multiplies the proportionality coefficient K by the acid consumption degree to obtain an estimated acidification dissolution amount RL, RL=K*HB*V, wherein V is the volume of the acid put into the acidification tank;

[0016] The dissolution analysis unit calculates the ratio of the acidification dissolution amount RL to the amount of the input raw material to be dissolved to obtain a dissolution ratio. If the dissolution ratio is greater than the set dissolution standard, an acidification completion signal is generated, otherwise an acidification incomplete signal is generated;

[0017] The dissolution analysis unit sends an acidification completion signal or an acidification incomplete signal to the central control platform.

[0018] As a preferred embodiment of the present invention, the feeding control unit sends a feeding completion signal to the central control platform after the feeding is completed, and the central control platform sends the time of obtaining the feeding completion signal to the dissolution analysis unit;

[0019] The dissolution analysis unit records the time of the feeding completion signal, compares the time of obtaining the feeding completion signal with the time of generating the acidification completion signal, obtains the dissolution time, and sends the dissolution time back to the central control platform.

[0020] As a preferred embodiment of the present invention, the central control platform calculates the ratio of the dissolution ratio and the dissolution time to obtain the relative dissolution rate, and the central control platform calculates the ratio of the acidification dissolution amount and the dissolution time to obtain the absolute dissolution rate;

[0021] The central control platform compares the relative dissolution rate with the relative speed threshold. If the relative dissolution rate is greater than the set relative speed threshold, a relative speed qualified signal is generated. If the relative dissolution rate is not greater than the set relative speed threshold, a relative speed unqualified signal is generated.

[0022] As a preferred embodiment of the present invention, the central control platform generates a normal dissolution signal after simultaneously generating a relative speed qualified signal and an absolute speed qualified signal;

[0023] The central control platform generates a feed shortage signal after simultaneously generating a relative speed qualified signal and an absolute speed unqualified signal;

[0024] The central control platform generates an excessive feeding signal when simultaneously generating a relative speed unqualified signal and an absolute speed qualified signal;

[0025] The central control platform generates a dissolution abnormality signal when simultaneously generating a relative speed unqualified signal and an absolute speed unqualified signal.

[0026] As a preferred embodiment of the present invention, the exhaust gas monitoring unit obtains a feeding completion signal through the central control platform, and records the time point of obtaining the feeding completion signal as the start time, and the exhaust gas monitoring unit obtains an acidification completion signal through the central control platform, and records the time point of the acidification completion signal as the end time;

[0027] The waste gas monitoring unit continuously detects the waste gas generated by the acidification tank, and records the waste gas generated between the start time and the end time as acidification waste gas, and records the waste gas generated in the time period before the start time and after the end time as solution waste gas;

[0028] The waste gas monitoring unit calculates the sum of the solution waste gas and the acidification waste gas, records it as the total waste gas volume, and calculates the proportion of the acidification waste gas in the total waste gas volume, records the acidification proportion, and compares the acidification proportion with the set threshold value, and generates an acid volatilization signal or does not respond according to the comparison result.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the present invention, the pH value of the acid solution is collected in the battery acidification workshop, so as to detect the pH value change. The consumption degree of the acid solution is obtained by analyzing the pH value change of the acid solution, and the dissolution amount is calculated according to the consumption degree of the acid solution. The feeding amount is counted and the feeding amount and the dissolution amount are comprehensively analyzed to obtain the actual acidification and dissolution ratio of the battery recycling material in the acidification workshop. The acidification process is controlled according to the obtained actual acidification and dissolution ratio, thereby improving the visualization of the acidification process, thereby avoiding the problem of excessive dissolution of impurities or insufficient dissolution recovery effect, resulting in waste of raw materials and environmental pollution due to the acidification time being too long or too short during filtration.

[0031] 2. In the present invention, when the battery is acidified and recovered, the amount of waste gas generated is obtained by detecting the waste gas, and the amount of waste gas generated is further comprehensively analyzed. According to the analysis results, the distribution ratio of the generated waste gas in the natural volatilization of acid or the acidification and dissolution process of acid is determined, thereby realizing accurate analysis and early warning of acid volatilization, avoiding environmental pollution and acid waste caused by long-term natural volatilization of acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0033] Figure 1 is a system block diagram of the present invention;

[0034] Figure 2 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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.

[0036] Embodiment 1:

[0037] See also Figure 1 - Figure 2 As shown in the figure, the workshop visualization control system of the lithium iron phosphate battery recycling processing production line includes an exhaust gas monitoring unit, a central control platform, a dissolution analysis unit, a feeding control unit and an acid analysis unit. The acid analysis unit collects the acidification pool in the acidification workshop, obtains the pH value of the acid in the acidification pool, and records it as a real-time pH value. The acid analysis unit obtains a preset initial acid pH value, compares the initial acid pH value with the real-time pH value, obtains the degree of acid consumption, and sends the degree of acid consumption to the dissolution analysis unit. When calculating the degree of acid consumption, the acid analysis unit obtains the acid consumption percentage HB through the formula, Where P1 is the real-time pH value, P0 is the initial pH value, and the percentage of acid consumption is recorded as the degree of acid consumption;

[0038] After obtaining the acid consumption degree, the dissolution analysis unit compares the acid consumption degree with the set acid consumption threshold value. If the acid consumption degree is greater than the set acid consumption threshold value, an acid consumption completion signal is generated. If the acid consumption degree is not greater than the set acid consumption threshold value, an acid consumption remaining signal is generated.

[0039] The dissolution analysis unit sends an acid consumption remaining signal or an acid consumption completion signal to the central control platform;

[0040] The feeding control unit is used to feed the pre-treated battery material into the acidification tank, and record the feeding amount during feeding to obtain the amount of raw material to be dissolved;

[0041] The dissolution analysis unit obtains a preset proportionality coefficient K, and multiplies the proportionality coefficient K by the acid consumption degree to obtain the estimated acid dissolution amount RL, RL = K*HB*V, where V is the volume of the acid put into the acidification tank;

[0042] The dissolution analysis unit calculates the ratio of the acidification dissolution amount RL to the amount of the input raw material to be dissolved to obtain the dissolution ratio. The dissolution analysis unit compares the dissolution ratio with the set standard. If the dissolution ratio is greater than the set dissolution standard, an acidification completion signal is generated. If the dissolution ratio is not greater than the set dissolution standard, an acidification incomplete signal is generated.

[0043] The dissolution analysis unit sends an acidification completion signal or an acidification incomplete signal to the central control platform.

[0044] Embodiment 2:

[0045] See also Figure 1 - Figure 2 As shown, the feeding control unit sends a feeding completion signal to the central control platform after the feeding is completed, and the central control platform sends the time of obtaining the feeding completion signal to the dissolution analysis unit;

[0046] The dissolution analysis unit records the time of the feeding completion signal, compares the time of obtaining the feeding completion signal with the time of generating the acidification completion signal, obtains the dissolution time, and sends the dissolution time back to the central control platform;

[0047] After the central control platform obtains the dissolution time, it conducts a comprehensive analysis of the dissolution time, dissolution ratio and acidification dissolution volume. The specific analysis process is as follows:

[0048] The central control platform calculates the ratio of the dissolution ratio and the ratio of the dissolution time, and records the calculation result as the relative dissolution rate;

[0049] The central control platform calculates the ratio of the acidification dissolution amount to the dissolution time, and records the calculation result as the absolute dissolution rate;

[0050] The central control platform compares the relative dissolution rate with the relative speed threshold. If the relative dissolution rate is greater than the set relative speed threshold, a relative speed qualified signal is generated. If the relative dissolution rate is not greater than the set relative speed threshold, a relative speed unqualified signal is generated.

[0051] The central control platform compares the absolute dissolution rate with the absolute speed threshold. If the absolute dissolution rate is greater than the set absolute speed threshold, an absolute speed qualified signal is generated. If the absolute dissolution rate is not greater than the set absolute speed threshold, an absolute speed unqualified signal is generated.

[0052] After the central control platform generates the relative speed qualified signal and the absolute speed qualified signal at the same time, it generates the dissolution normal signal;

[0053] After the central control platform generates the relative speed qualified signal and the absolute speed unqualified signal at the same time, it generates the insufficient feeding signal;

[0054] When the central control platform generates a relative speed failure signal and an absolute speed failure signal at the same time, it generates an overfeed signal;

[0055] The central control platform generates a dissolution abnormality signal when simultaneously generating a relative speed failure signal and an absolute speed failure signal;

[0056] The central control platform displays the normal dissolution signal, insufficient material feeding signal, excessive material feeding signal, and abnormal dissolution signal through the display device, and issues an alarm for signals other than the normal dissolution signal.

[0057] Embodiment three:

[0058] See also Figure 1 - Figure 2 As shown, the exhaust gas monitoring unit obtains the feeding completion signal through the central control platform, and records the time point of obtaining the feeding completion signal as the start time. At the same time, the exhaust gas monitoring unit obtains the acidification completion signal through the central control platform, and records the time point of the acidification completion signal as the end time.

[0059] The waste gas monitoring unit continuously detects the waste gas generated by the acidification tank, and records the waste gas generated between the start time and the end time as acidification waste gas, and records the waste gas generated in the time period before the start time and after the end time as solution waste gas;

[0060] The waste gas monitoring unit calculates the sum of the solution waste gas and the acidification waste gas, records it as the total waste gas volume, then calculates the proportion of the solution waste gas in the total waste gas volume and the proportion of the acidification waste gas in the total waste gas volume, and records them as the solution proportion and the acidification proportion respectively. The waste gas monitoring unit compares the acidification proportion with the set threshold value. If the acidification proportion is not greater than the set threshold value, an acid volatilization signal is generated. If the acidification proportion is greater than the set threshold value, no response is made. The waste gas monitoring unit sends the acid volatilization signal to the central control platform, and the central control platform issues an alarm for the acid volatilization signal.

[0061] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The workshop visual control system of the lithium iron phosphate battery recycling production line is characterized by: It includes a waste gas monitoring unit, which is used to collect statistics on waste gas during the acidification process, analyze the waste gas generation distribution, and obtain the acid volatilization judgment result; An acid analysis unit, which acquires the pH value of the acid and analyzes the degree of consumption of the acid; A feeding control unit, which can obtain the amount of raw materials input and the time of input, and record them as the amount of raw materials to be dissolved and the feeding time; A dissolution analysis unit, wherein the dissolution analysis unit obtains the degree of acid consumption, determines the degree of completeness of acid consumption and the degree of completion of acidification, and obtains the acidification dissolution amount, dissolution ratio and dissolution time; The central control platform obtains the dissolution ratio, dissolution time and acidification dissolution amount for comprehensive analysis, and comprehensively analyzes the absolute speed and relative speed of the dissolution process to obtain the dissolution evaluation result.

2. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 1 is characterized in that: The acid analysis unit collects the acid pool in the acidification workshop, obtains the pH value of the acid in the acid pool, and records it as a real-time pH value P1. The acid analysis unit obtains the preset initial acid pH value P0, and calculates the acid consumption percentage HB through the formula. The acid consumption percentage is recorded as the acid consumption degree, and the acid consumption degree is sent to the dissolution analysis unit.

3. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 2 is characterized in that: After obtaining the acid consumption degree, the dissolution analysis unit compares the acid consumption degree with a set acid consumption threshold, and generates an acid consumption completion signal or an acid consumption remaining signal according to the comparison result; The dissolution analysis unit sends an acid solution consumption remaining signal or an acid solution consumption completion signal to the central control platform.

4. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 3 is characterized in that: The dissolution analysis unit obtains a preset proportionality coefficient K, and multiplies the proportionality coefficient K by the acid consumption degree to obtain an estimated acidification dissolution amount RL, RL=K*HB*V, where V is the volume of the acid put into the acidification tank; The dissolution analysis unit calculates the ratio of the acidification dissolution amount RL to the amount of the input raw material to be dissolved to obtain a dissolution ratio. If the dissolution ratio is greater than the set dissolution standard, an acidification completion signal is generated, otherwise an acidification incomplete signal is generated; The dissolution analysis unit sends an acidification completion signal or an acidification incomplete signal to the central control platform.

5. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 1 is characterized in that: The feeding control unit sends a feeding completion signal to the central control platform after the feeding is completed, and the central control platform sends the time of obtaining the feeding completion signal to the dissolution analysis unit; The dissolution analysis unit records the time of the feeding completion signal, compares the time of obtaining the feeding completion signal with the time of generating the acidification completion signal, obtains the dissolution time, and sends the dissolution time back to the central control platform.

6. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 1 is characterized in that: The central control platform calculates the ratio of the dissolution ratio and the dissolution time to obtain the relative dissolution rate, and the central control platform calculates the ratio of the acidification dissolution amount and the dissolution time to obtain the absolute dissolution rate; The central control platform compares the relative dissolution rate with the relative speed threshold. If the relative dissolution rate is greater than the set relative speed threshold, a relative speed qualified signal is generated. If the relative dissolution rate is not greater than the set relative speed threshold, a relative speed unqualified signal is generated.

7. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 6 is characterized in that: The central control platform generates a normal dissolution signal after simultaneously generating a relative speed qualified signal and an absolute speed qualified signal; The central control platform generates a feed shortage signal after simultaneously generating a relative speed qualified signal and an absolute speed unqualified signal; The central control platform generates an excessive feeding signal when simultaneously generating a relative speed unqualified signal and an absolute speed qualified signal; The central control platform generates a dissolution abnormality signal when simultaneously generating a relative speed unqualified signal and an absolute speed unqualified signal.

8. The workshop visualization control system of the lithium iron phosphate battery recycling production line according to claim 1, characterized in that: The exhaust gas monitoring unit obtains a feeding completion signal through the central control platform, and records the time point of obtaining the feeding completion signal as the start time; the exhaust gas monitoring unit obtains an acidification completion signal through the central control platform, and records the time point of the acidification completion signal as the end time; The waste gas monitoring unit continuously detects the waste gas generated by the acidification tank, and records the waste gas generated between the start time and the end time as acidification waste gas, and records the waste gas generated in the time period before the start time and after the end time as solution waste gas; The waste gas monitoring unit calculates the sum of the solution waste gas and the acidified waste gas, records it as the total waste gas volume, calculates the proportion of the acidified waste gas in the total waste gas volume, records the acidification proportion, and compares the acidification proportion with the set threshold value, and generates an acid volatilization signal or does not respond based on the comparison result.

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