A distillation anomaly detection system and method

Abstract

The application provides a rectification anomaly detection system and method in the technical field of electronic waste liquid recovery, which comprises a raw material tank, a finished product tank, a first filter, a second filter, an electric pump, an evaporator, a first rectification tower, a second rectification tower, a first sensor group, a second sensor group, a third sensor group, a first pressure relief valve, a second pressure relief valve, a third pressure relief valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a PLC, a wireless communication module, a display screen and an alarm module; the raw material tank, the first electromagnetic valve, the first filter, the electric pump, the second electromagnetic valve, the second filter, the evaporator, the third electromagnetic valve, the first rectification tower, the fourth electromagnetic valve, the second rectification tower, the fifth electromagnetic valve and the finished product tank are sequentially connected. The application has the advantages that the reliability and timeliness of rectification anomaly detection are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic waste liquid recovery, and particularly relates to a distillation anomaly detection system and method. BACKGROUND

[0002] In the process of producing and manufacturing chips and circuit boards in the electronic manufacturing industry and the optoelectronic industry, a large amount of electronic waste liquid is generated. For example, a mixed liquid of propylene glycol methyl ether (PM) and propylene glycol monomethyl ether acetate (PMA) is often used as a photoresist diluent, a photoresist remover, a photoresist buffer solution and a cleaning agent, and is used in large quantities to remove ester substances such as photoresist on a panel. In the actual production process, etching liquid and other reagents are also used. These reagents become electronic waste liquid after use.

[0003] Because the electronic waste liquid contains a large amount of propylene glycol methyl ether, propylene glycol monomethyl ether acetate, photoresist and other impurities, it is harmful to the environment, and the recovery and reuse of propylene glycol methyl ether and propylene glycol monomethyl ether acetate have high commercial value. Therefore, there is a demand for distillation of electronic waste liquid to recover and reuse valuable raw materials.

[0004] The distillation equipment for distilling electronic waste liquid will inevitably fail, age and the like during long-term operation, or the change of environmental factors will cause the change of distillation parameters, which will directly affect the distillation quality of the electronic waste liquid. If the raw material separated by distillation still carries a large amount of impurities, this part of the raw material will be discarded because it cannot be used, or needs to be distilled again, which undoubtedly causes great waste. Therefore, there is a demand for distillation anomaly detection. However, traditionally, whether the distillation process is abnormal is judged based on the working experience of the staff through staff inspection, which not only has great subjectivity, but also has poor timeliness.

[0005] Therefore, how to provide a distillation anomaly detection system and method to improve the reliability and timeliness of distillation anomaly detection has become a technical problem to be solved. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a distillation anomaly detection system and method to improve the reliability and timeliness of distillation anomaly detection.

[0007] In a first aspect, the present application provides a rectification abnormality detection system, comprising a raw material tank, a finished product tank, a first filter, a second filter, an electric pump, an evaporator, a first rectification tower, a second rectification tower, a first sensor group, a second sensor group, a third sensor group, a first pressure relief valve, a second pressure relief valve, a third pressure relief valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a PLC, a wireless communication module, a display screen, and an alarm module.

[0008] The raw material tank, the first electromagnetic valve, the first filter, the electric pump, the second electromagnetic valve, the second filter, the evaporator, the third electromagnetic valve, the first rectification tower, the fourth electromagnetic valve, the second rectification tower, the fifth electromagnetic valve, and the finished product tank are sequentially connected.

[0009] The first sensor group, the first pressure relief valve, and the first heat exchanger are all connected with the evaporator; the second sensor group, the second pressure relief valve, and the second heat exchanger are all connected with the first rectification tower; the third sensor group, the third pressure relief valve, and the third heat exchanger are all connected with the second rectification tower.

[0010] The PLC is connected with the first filter, the second filter, the electric pump, the evaporator, the first rectification tower, the second rectification tower, the first sensor group, the second sensor group, the third sensor group, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger, the third heat exchanger, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the wireless communication module, the display screen, and the alarm module, respectively.

[0011] Further, the back material port of the second rectification tower is in communication with the feed port of the evaporator.

[0012] Further, the first sensor group, the second sensor group, and the third sensor group all comprise a temperature sensor, a flow sensor, a pressure sensor, a liquid level sensor, and a pH sensor.

[0013] The control ends of the temperature sensor, the flow sensor, the pressure sensor, the liquid level sensor, and the pH sensor are all connected with the PLC.

[0014] Further, the wireless communication module is at least one of a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, a LORA communication module, a WIFI communication module, a Bluetooth communication module, or a ZigBee communication module.

[0015] Further, the alarm module comprises an indicator light and a buzzer; the indicator light and the buzzer are connected with the PLC.

[0016] Further, the water inlet pipe and the sixth electromagnetic valve are further included.

[0017] The water inlet pipe is communicated with the feed inlet of the first filter through the sixth electromagnetic valve; and the sixth electromagnetic valve is connected with the PLC.

[0018] Further, the waste discharge pipe is further included and is communicated with the waste discharge port of the evaporator.

[0019] Further, the cloud server is further included and is connected with the wireless communication module.

[0020] In a second aspect, the present application provides a rectification abnormality detection method, comprising the following steps:

[0021] In step S1, the PLC starts the first filter, the second filter, the electric pump, the evaporator, the first rectification tower and the second rectification tower based on the rectification instructions input by the display screen, and opens the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve.

[0022] In step S2, the electronic waste liquid stored in the raw material tank is pumped to the evaporator by the electric pump, and the electronic waste liquid is filtered by the first filter and the second filter during the transmission process.

[0023] In step S3, after the evaporator evaporates the input electronic waste liquid, the evaporated electronic waste liquid is sequentially input into the first rectification tower and the second rectification tower for rectification, and the recovered material obtained by the rectification is input into the finished product tank for storage.

[0024] In step S4, during the rectification of the electronic waste liquid, the PLC collects monitoring data including temperature value, flow value, pressure value, liquid level value and pH value in real time through the first sensor group, the second sensor group and the third sensor group, and displays the monitoring data in the form of a chart on the display screen.

[0025] In step S5, the PLC respectively presets the value range of the temperature value, the flow value, the pressure value, the liquid level value and the pH value, detects the monitoring data based on the value range, and generates a rectification abnormality detection report.

[0026] In step S6, the PLC dynamically adjusts the work of the electric pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger and the third heat exchanger based on the rectification abnormality detection report.

[0027] Step S7, the PLC uploads the rectification anomaly detection report, monitoring data and operation log of the rectification anomaly detection system to the cloud server through the wireless communication module for archiving.

[0028] Further, the step S7 is specifically:

[0029] The PLC encrypts the rectification anomaly detection report, monitoring data and operation log of the rectification anomaly detection system through the national secret algorithm, and then packages them into an encrypted data packet, which is uploaded to the cloud server through the wireless communication module through the HTTP protocol.

[0030] The cloud server performs hash calculation on the encrypted data packet to obtain a hash value, randomly generates a symmetric key, encrypts the encrypted data packet using the symmetric key and stores it in the IPFS system, and synchronizes the hash value and the index address returned by the IPFS system to the blockchain in real time after binding.

[0031] The advantages of the present application are:

[0032] By setting the PLC to be connected with the first filter, the second filter, the electric pump, the evaporator, the first rectification tower, the second rectification tower, the first sensor group, the second sensor group, the third sensor group, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger, the third heat exchanger, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the wireless communication module, the display screen and the alarm module, and by connecting the temperature sensor, the flow sensor, the pressure sensor, the liquid level sensor and the pH sensor of the first sensor group, the second sensor group and the third sensor group to the evaporator, the first rectification tower and the second rectification tower respectively, the PLC controls the evaporator, the first rectification tower and the second rectification tower and other equipment to carry out the rectification process of the electronic waste liquid, and through the first sensor group, the second sensor group and the third sensor group, the monitoring data including the temperature value, the flow value, the pressure value, the liquid level value and the pH value are collected in real time, and whether there is an abnormal situation can be quickly judged by judging whether the monitoring data exceeds the preset value range, and when an index is abnormal, the work of the electric pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger or the third heat exchanger can be dynamically adjusted to restore normality, which greatly improves the reliability and timeliness of rectification anomaly detection compared with traditional inspection and judgment based on working experience. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0034] Fig. 1is a structure schematic diagram of a rectification abnormality detection system of the present application.

[0035] Fig. 2 is a circuit principle block diagram of a rectification abnormality detection system of the present application.

[0036] Fig. 3 is a circuit principle block diagram of a first sensor group of the present application.

[0037] Fig. 4 is a flow chart of a rectification abnormality detection method of the present application.

[0038] Label description:

[0039] 100-a rectification abnormality detection system, 1-a raw material tank, 2-a finished product tank, 3-a first filter, 4-a second filter, 5-an electric pump, 6-an evaporator, 7-a first rectification column, 8-a second rectification column, 9-a first sensor group, 10-a second sensor group, 11-a third sensor group, 12-a first pressure relief valve, 13-a second pressure relief valve, 14-a third pressure relief valve, 15-a first heat exchanger, 16-a second heat exchanger, 17-a third heat exchanger, 18-a first electromagnetic valve, 19-a second electromagnetic valve, 20-a third electromagnetic valve, 21-a fourth electromagnetic valve, 22-a fifth electromagnetic valve, 23-a PLC, 24-a wireless communication module, 25-a display screen, 26-an alarm module, 27-a water inlet pipe, 28-a sixth electromagnetic valve, 29-a waste pipe, 30-a cloud server, 91-a temperature sensor, 92-a flow sensor, 93-a pressure sensor, 94-a liquid level sensor, 95-a pH sensor, 261-an indicator light, 262-a buzzer. DETAILED DESCRIPTION

[0040] The technical solution in the embodiments of the present application has the following general idea: in the rectification process, the PLC 23 collects monitoring data including temperature value, flow value, pressure value, liquid level value and pH value in real time through the first sensor group 9, the second sensor group 10 and the third sensor group 11, judges whether there is an abnormal situation by judging whether the monitoring data exceeds the preset value range, dynamically adjusts the work of the electric pump 5, the first electromagnetic valve 18, the second electromagnetic valve 19, the third electromagnetic valve 20, the fourth electromagnetic valve 21, the fifth electromagnetic valve 22, the sixth electromagnetic valve, the first pressure relief valve 12, the second pressure relief valve 13, the third pressure relief valve 14, the first heat exchanger 15, the second heat exchanger 16 or the third heat exchanger 17 to restore normal when a certain index is abnormal, and thus improves the reliability and timeliness of rectification abnormality detection.

[0041] Please refer to Figs. 1 to 4As shown, a preferred embodiment of the distillation abnormality detection system 100 of the present application comprises a raw material tank 1, a finished product tank 2, a first filter 3, a second filter 4, an electric pump 5, an evaporator 6, a first distillation column 7, a second distillation column 8, a first sensor group 9, a second sensor group 10, a third sensor group 11, a first pressure relief valve 12, a second pressure relief valve 13, a third pressure relief valve 14, a first heat exchanger 15, a second heat exchanger 16, a third heat exchanger 17, a first solenoid valve 18, a second solenoid valve 19, a third solenoid valve 20, a fourth solenoid valve 21, a fifth solenoid valve 22, a PLC 23, a wireless communication module 24, a display screen 25, and an alarm module 26;

[0042] The raw material tank 1 is used for storing electronic waste liquid; the finished product tank 2 is used for storing the recovered material obtained by distillation; the first filter 3 and the second filter 4 are both used for filtering the electronic waste liquid; the electric pump 5 is used for pumping the electronic waste liquid from the raw material tank 1 to the evaporator 6; the evaporator 6 is used for evaporating the electronic waste liquid; the first distillation column 7 and the second distillation column 8 are used for distilling the electronic waste liquid; the first sensor group 9, the second sensor group 10, and the third sensor group 11 are all used for collecting monitoring data including temperature value, flow value, pressure value, liquid level value, and pH value; the first pressure relief valve 12, the second pressure relief valve 13, and the third pressure relief valve 14 are all used for pressure relief when the pressure is too high; the first heat exchanger 15, the second heat exchanger 16, and the third heat exchanger 17 are used for temperature adjustment; the first solenoid valve 18, the second solenoid valve 19, the third solenoid valve 20, the fourth solenoid valve 21, and the fifth solenoid valve 22 are all used for on-off liquid flow passage; the PLC 23 is used for controlling the operation of the detection system 100; the wireless communication module 24 is used for communication between the PLC 23 and the cloud server 30; the display screen 25 is used for controlling the detection system 100, displaying monitoring data, and is a touch display screen; the alarm module 26 is used for alarm when distillation is abnormal;

[0043] The raw material tank 1, the first solenoid valve 18, the first filter 3, the electric pump 5, the second solenoid valve 19, the second filter 4, the evaporator 6, the third solenoid valve 20, the first distillation column 7, the fourth solenoid valve 21, the second distillation column 8, the fifth solenoid valve 22, and the finished product tank 2 are connected in sequence;

[0044] The first sensor group 9, the first pressure relief valve 12, and the first heat exchanger 15 are all connected with the evaporator 6; the second sensor group 10, the second pressure relief valve 13, and the second heat exchanger 16 are all connected with the first distillation column 7; the third sensor group 11, the third pressure relief valve 14, and the third heat exchanger 17 are all connected with the second distillation column 8;

[0045] The PLC 23 is connected with the first filter 3, the second filter 4, the electric pump 5, the evaporator 6, the first rectifying tower 7, the second rectifying tower 8, the first sensor group 9, the second sensor group 10, the third sensor group 11, the first pressure relief valve 12, the second pressure relief valve 13, the third pressure relief valve 14, the first heat exchanger 15, the second heat exchanger 16, the third heat exchanger 17, the first electromagnetic valve 18, the second electromagnetic valve 19, the third electromagnetic valve 20, the fourth electromagnetic valve 21, the fifth electromagnetic valve 22, the wireless communication module 24, the display screen 25 and the alarm module 26 respectively.

[0046] The back material port of the second rectifying tower 8 is communicated with the feeding port of the evaporator 6 to perform secondary circulating rectification.

[0047] The first sensor group 9, the second sensor group 10 and the third sensor group 11 each include a temperature sensor 91, a flow sensor 92, a pressure sensor 93, a liquid level sensor 94 and a pH sensor 95.

[0048] The control ends of the temperature sensor 91, the flow sensor 92, the pressure sensor 93, the liquid level sensor 94 and the pH sensor 95 are connected with the PLC 23.

[0049] The wireless communication module 24 is at least one of a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, a LORA communication module, a WIFI communication module, a Bluetooth communication module or a ZigBee communication module.

[0050] The alarm module 26 includes an indicator light 261 and a buzzer 262, and the indicator light 261 and the buzzer 262 are connected with the PLC 23.

[0051] Further including a water inlet pipe 27 and a sixth electromagnetic valve 28 for inputting liquid to neutralize the electronic waste liquid and adjust the pH value of the electronic waste liquid.

[0052] The water inlet pipe 27 is communicated with the feeding port of the first filter 3 through the sixth electromagnetic valve 28, and the sixth electromagnetic valve 28 is connected with the PLC 23.

[0053] Further including a waste discharge pipe 29 communicated with the waste discharge port of the evaporator 6 for discharging waste outside.

[0054] Further including a cloud server 30 connected with the wireless communication module 24 for remotely controlling the detection system 100 and backing up relevant data.

[0055] The preferable embodiment of the rectification abnormality detection method includes the following steps.

[0056] Step S1, the PLC starts the first filter, the second filter, the electric pump, the evaporator, the first rectifying column and the second rectifying column based on the rectification instruction input by the display screen, and opens the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve, that is, opens the passage of rectification and starts the corresponding equipment;

[0057] Step S2, the electronic waste liquid stored in the raw material tank is pumped to the evaporator by the electric pump, and the electronic waste liquid is filtered by the first filter and the second filter during the transmission process; the secondary filtration through the first filter and the second filter effectively improves the quality of the electronic waste liquid;

[0058] Step S3, after the evaporator evaporates the input electronic waste liquid, the electronic waste liquid is input into the first rectifying column and the second rectifying column in turn for rectification, and the recovered material obtained by rectification is input into the finished product tank for storage;

[0059] Step S4, during the rectification of the electronic waste liquid, the PLC collects monitoring data including temperature value, flow value, pressure value, liquid level value and pH value in real time through the first sensor group, the second sensor group and the third sensor group, and displays the monitoring data in the form of a chart on the display screen;

[0060] Step S5, the PLC has preset value ranges of temperature value, flow value, pressure value, liquid level value and pH value, detects the monitoring data based on the value ranges, generates a rectification abnormality detection report, and alarms through the alarm module when there is an abnormality;

[0061] Step S6, the PLC dynamically adjusts the work of the electric pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger and the third heat exchanger based on the rectification abnormality detection report;

[0062] For example, when the temperature value of the first rectifying column is detected to be too high, the second heat exchanger can be used to reduce the temperature of the first rectifying column; when the flow value is detected to be too large, the opening degree of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve or the fifth electromagnetic valve can be reduced; when the pressure value of the first rectifying column is detected to be too high, the second pressure relief valve can be used to reduce the pressure of the first rectifying column; when the liquid level value is detected to be too low, the output power of the electric pump can be increased; and when the pH value is detected to be too acidic, the sixth electromagnetic valve is opened to input lye for neutralization.

[0063] Step S7, the PLC uploads the rectification abnormality detection report, the monitoring data and the operation log of the rectification abnormality detection system to the cloud server through the wireless communication module for archiving.

[0064] The step S7 specifically comprises:

[0065] The PLC encrypts the rectification anomaly detection report, the monitoring data and the operation log of the rectification anomaly detection system by using the national secret algorithm, and then packs the same into an encrypted data packet, and uploads the encrypted data packet to a cloud server through a wireless communication module through an HTTP protocol;

[0066] The cloud server performs hash calculation on the encrypted data packet to obtain a hash value, randomly generates a symmetric key, encrypts the encrypted data packet by using the symmetric key and stores the same into an IPFS system, binds the hash value and an index address returned by the IPFS system and synchronizes the same to a blockchain in real time.

[0067] Since the hash calculation is irreversible, the encrypted data packet is subjected to hash calculation again subsequently, and whether the hash values obtained through comparison calculation and stored in the blockchain are consistent can be determined, so that whether the encrypted data packet is tampered with can be quickly determined; the hash value and the index address are notarized through the blockchain, so that the hash value and the index address are prevented from being tampered with, the encrypted data packet is subjected to hash verification through the hash value, the encrypted data packet is subjected to encrypted storage through the randomly generated symmetric key, and the encrypted data packet is obtained by encrypting the rectification anomaly detection report, the monitoring data and the operation log through the national secret algorithm, so that multiple security measures are taken before and after, and the security and reliability of the rectification anomaly detection report, the monitoring data and the operation log management are greatly improved.

[0068] In summary, the advantages of the present application are:

[0069] The PLC is connected with the first filter, the second filter, the electric pump, the evaporator, the first rectifying tower, the second rectifying tower, the first sensor group, the second sensor group, the third sensor group, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger, the third heat exchanger, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the wireless communication module, the display screen and the alarm module, and the temperature sensor, the flow sensor, the pressure sensor, the liquid level sensor and the pH sensor of the first sensor group, the second sensor group and the third sensor group are connected to the evaporator, the first rectifying tower and the second rectifying tower respectively, so that the PLC controls the evaporator, the first rectifying tower and the second rectifying tower and other equipment to carry out the rectification process on the electronic waste liquid, the monitoring data including the temperature value, the flow value, the pressure value, the liquid level value and the pH value are collected in real time through the first sensor group, the second sensor group and the third sensor group, and whether the abnormal situation exists can be quickly judged by judging whether the monitoring data exceeds the preset value range, when the abnormality of a certain index is found, the work of the electric pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger or the third heat exchanger can be dynamically adjusted to restore normal, compared with the traditional inspection and the judgment based on the working experience, the reliability and the timeliness of the rectification abnormality detection are greatly improved.

[0070] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific embodiments described are only illustrative, and are not intended to limit the scope of the present application, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present application should be covered within the scope of the claims of the present application.

Claims

1. A method for detecting distillation anomalies, characterized in that: The method requires the use of the following distillation anomaly detection system, including a raw material tank, a finished product tank, a first filter, a second filter, an electric pump, an evaporator, a first distillation column, a second distillation column, a first sensor group, a second sensor group, a third sensor group, a first pressure relief valve, a second pressure relief valve, a third pressure relief valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a PLC, a wireless communication module, a display screen, and an alarm module; The raw material tank, the first solenoid valve, the first filter, the electric pump, the second solenoid valve, the second filter, the evaporator, the third solenoid valve, the first distillation column, the fourth solenoid valve, the second distillation column, the fifth solenoid valve, and the finished product tank are connected in sequence. The first sensor group, the first pressure relief valve, and the first heat exchanger are all connected to the evaporator; the second sensor group, the second pressure relief valve, and the second heat exchanger are all connected to the first distillation column; the third sensor group, the third pressure relief valve, and the third heat exchanger are all connected to the second distillation column. The PLC is connected to the first filter, the second filter, the electric pump, the evaporator, the first distillation column, the second distillation column, the first sensor group, the second sensor group, the third sensor group, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger, the third heat exchanger, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the wireless communication module, the display screen, and the alarm module, respectively. The method includes the following steps: Step S1: Based on the distillation command input on the display screen, the PLC starts the first filter, the second filter, the electric pump, the evaporator, the first distillation column and the second distillation column, and opens the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve. Step S2: The electronic waste liquid stored in the raw material tank is pumped to the evaporator by an electric pump, and the electronic waste liquid is filtered through the first filter and the second filter during the transfer process; Step S3: After the evaporator evaporates the input electronic waste liquid, it is sequentially fed into the first distillation column and the second distillation column for distillation. The recovered product obtained from the distillation is then fed into the finished product tank for storage. Step S4: During the distillation of electronic waste liquid, the PLC collects monitoring data including temperature, flow rate, pressure, liquid level and pH value in real time through the first sensor group, the second sensor group and the third sensor group, and displays the monitoring data in the form of charts on the display screen. Step S5: The PLC is preset with temperature, flow rate, pressure, liquid level and pH value ranges respectively. Based on the value ranges, the monitoring data is detected and a distillation anomaly detection report is generated. Step S6: The PLC dynamically adjusts the operation of the electric pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first pressure relief valve, the second pressure relief valve, the third pressure relief valve, the first heat exchanger, the second heat exchanger, and the third heat exchanger based on the distillation anomaly detection report. Step S7: The PLC encrypts the distillation anomaly detection report, monitoring data, and operation log of the distillation anomaly detection system using the national cryptographic algorithm, and then packages them into an encrypted data packet. The encrypted data packet is then uploaded to the cloud server via the wireless communication module through the HTTP protocol. The cloud server performs hash calculation on the encrypted data packet to obtain a hash value, randomly generates a symmetric key, uses the symmetric key to encrypt the encrypted data packet and stores it in the IPFS system, and binds the hash value and the index address returned by the IPFS system to the blockchain in real time.

2. The distillation anomaly detection method as described in claim 1, characterized in that: The return port of the second distillation column is connected to the feed port of the evaporator.

3. The distillation anomaly detection method as described in claim 1, characterized in that: The first sensor group, the second sensor group, and the third sensor group each include a temperature sensor, a flow sensor, a pressure sensor, a liquid level sensor, and a pH sensor; The control terminals of the temperature sensor, flow sensor, pressure sensor, liquid level sensor, and pH sensor are all connected to the PLC.

4. The distillation anomaly detection method as described in claim 1, characterized in that: The wireless communication module is at least one of the following: 2G communication module, 3G communication module, 4G communication module, 5G communication module, NB-IoT communication module, LoRa communication module, WIFI communication module, Bluetooth communication module, or ZigBee communication module.

5. The distillation anomaly detection method as described in claim 1, characterized in that: The alarm module includes an indicator light and a buzzer; both the indicator light and the buzzer are connected to the PLC.

6. The distillation anomaly detection method as described in claim 1, characterized in that: It also includes the water inlet pipe and the sixth solenoid valve; The water inlet pipe is connected to the feed port of the first filter through a sixth solenoid valve; the sixth solenoid valve is connected to the PLC.

7. The distillation anomaly detection method as described in claim 1, characterized in that: It also includes a waste discharge pipe, which is connected to the waste discharge port of the evaporator.

8. The distillation anomaly detection method as described in claim 1, characterized in that: It also includes a cloud server, which is connected to the wireless communication module.

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