Electrode fault recognition system, recognition method, recognition device and storage medium

Abstract

The embodiment of the application provides an electrode fault identification system, an identification method, an identification device and a storage medium, and belongs to the technical field of plasma. The electrode fault identification system is applied to a plasma reactor comprising a pair of discharge electrodes, and comprises: an auxiliary electrode adapted to be installed on an electrode displacement device so as to be capable of moving into or out of a discharge area between two electrodes in the pair of discharge electrodes with the assistance of the electrode displacement device; a current detection device for detecting a discharge current between the auxiliary electrode and a to-be-identified electrode when the to-be-identified electrode in the pair of discharge electrodes is in a detection state and the auxiliary electrode enters the discharge area; and a control device for determining whether the to-be-identified electrode has a fault according to the discharge current detected by the current detection device. The embodiment of the application can identify the fault condition of the discharge electrode without affecting the working condition of the discharge electrode, does not need manual judgment, and improves the safety of the discharge electrode.

Description

Technical Field

[0001] This invention relates to the field of plasma technology, and more specifically to an electrode fault identification system, identification method, identification device, and storage medium. Background Technology

[0002] Low-temperature plasma technology employing dielectric barrier discharge is an effective means of treating low-concentration organic waste gas and odors, and it has been widely applied in chemical, spraying, animal husbandry, and municipal wastewater treatment fields. Taking volatile organic compounds (VOCs) as an example, the principle of low-temperature plasma degradation of VOCs is as follows: a high voltage is applied to the positive and negative plasma electrodes to generate a strong electric field between them, producing discharge gas. Electrons in the discharge gas gain energy from the electric field and transfer this energy to other molecules through collisions, causing them to ionize and generate more electrons, thus triggering an electron avalanche. During the electron avalanche process, a large number of highly reactive particles, such as electrons, active free radicals, dissociated atoms, and excited-state molecules, exist in the plasma discharge region, which can effectively destroy some VOC molecules that are difficult to degrade in other reaction systems. Covering the surface of the metal electrodes with a barrier medium, such as quartz, ceramic, or nylon, not only limits the unlimited growth of the discharge current and inhibits the formation of spark discharge or arc discharge between electrodes, but also protects the electrodes from corrosive gases and high-purity plasma.

[0003] However, in practical applications, equipment performance degradation caused by electrode failure and damage occurs frequently. Currently, electrode failure detection involves manually removing the discharge plate and replacing the faulty or damaged electrode when the plasma reactor's performance in treating waste gas significantly declines or during routine maintenance. However, this method requires the plasma reactor to be shut down, which is detrimental to the long-term stable operation of the equipment. Furthermore, manual judgment and maintenance are not only time-consuming and labor-intensive, but also cannot accurately identify electrode failures in a timely manner. Summary of the Invention

[0004] The purpose of this invention is to provide an electrode fault identification system, identification method, identification device, and storage medium to at least partially solve the aforementioned technical problems.

[0005] To achieve the above objectives, in a first aspect, embodiments of the present invention provide an electrode fault identification system applied to a plasma reactor including a discharge electrode pair. The electrode fault identification system includes: an auxiliary electrode, an electrode displacement device, a current detection device, and a control device. The auxiliary electrode is adapted to be installed with the electrode displacement device to move into or out of the discharge region between two electrodes in the discharge electrode pair with the assistance of the electrode displacement device. The current detection device is used to detect the discharge current between the auxiliary electrode and the electrode to be detected when the electrode to be identified in the discharge electrode pair is in a detection state and the auxiliary electrode enters the discharge region. The state refers to the state in which the electrode to be identified discharges in response to a preset detection voltage. The control device is used to determine whether the electrode to be identified has malfunctioned based on the discharge current detected by the current detection device.

[0006] Optionally, when the auxiliary electrode is within the discharge region, the auxiliary electrode is parallel to and opposite the two electrodes of the discharge electrode, and the distance between the auxiliary electrode and the two electrodes is the same.

[0007] Optionally, the electrode displacement device includes: a sliding unit, including a slide rail penetrating the inside and outside of the discharge region, and the slide rail is used to embed the auxiliary electrode; a driving unit, used to drive the auxiliary electrode to move along the slide rail; and a fixing unit, used to fix the auxiliary electrode outside the discharge region when the auxiliary electrode moves out of the discharge region along the slide rail.

[0008] Optionally, the electrode fault identification system further includes: a voltage detection device, used to detect the initial discharge voltage between the auxiliary electrode and the electrode to be identified when the electrode to be identified is in a detection state and the auxiliary electrode enters the discharge region; and the control device is also used to determine the detection voltage based on the initial discharge voltage.

[0009] Optionally, the electrode fault detection system further includes a switching device for switching between the working state and the detection state of the electrode to be identified, wherein the working state of the electrode to be identified refers to the state in which the electrode to be identified discharges in response to a preset working voltage.

[0010] Optionally, the switching device includes: a working switch adapted to a working power supply setting that provides the working voltage, used to enable or deactivate any one of the discharge electrodes to operate by controlling the power supply of the working power supply; and a detection switch adapted to a detection power supply setting that provides the detection voltage, used to enable or deactivate any one of the discharge electrodes to operate by controlling the power supply of the detection power supply.

[0011] Optionally, the electrode fault identification system further includes an alarm device for issuing an alarm when the control device determines that the electrode to be identified has a fault.

[0012] Optionally, the discharge current includes a first discharge current and a second discharge current, wherein the first discharge current is the current generated by the electrode to be identified and the auxiliary electrode under the action of the detection voltage before the electrode to be identified undergoes purification treatment, and the second discharge current is the current generated by the electrode to be identified and the auxiliary electrode under the action of the detection voltage after the electrode to be identified undergoes purification treatment. The control device is configured to determine whether the electrode to be identified has malfunctioned based on the first discharge current and the second discharge current, which includes: calculating the integral value of the positive current pulse under any discharge cycle of the first discharge current and the second discharge current respectively to obtain a first micro-discharge total current corresponding to the first discharge current and a second micro-discharge total current corresponding to the second discharge current; comparing the current ratio between the first micro-discharge total current and the second micro-discharge total current with a preset safety threshold range; if the current ratio is within the safety threshold range, then the electrode to be identified is determined to be operating normally; otherwise, the electrode to be identified has malfunctioned.

[0013] Optionally, after determining that the electrode has failed, the control device is further configured to: determine the fault type and fault severity of the electrode to be identified based on the degree of deviation of the current ratio from the safety threshold range, wherein the corresponding fault types, in ascending order of the degree of deviation, include coking faults on the plasma electrode surface, crack faults on the plasma electrode surface, fragmentation faults inside the plasma electrode, and continuous liquid water faults between plasma electrodes, and the greater the degree of deviation, the higher the degree of fault.

[0014] Secondly, embodiments of the present invention provide an electrode fault identification method, which is applied to a plasma reactor having a discharge electrode pair, and the electrode fault identification method is based on an auxiliary electrode, wherein the auxiliary electrode can move into or out of the discharge region between two electrodes in the discharge electrode pair, and the electrode fault identification method includes: acquiring the discharge current between the auxiliary electrode and the electrode to be identified when the electrode to be identified in the discharge electrode pair is in a detection state and the auxiliary electrode enters the discharge region, wherein the detection state refers to the state in which the electrode to be identified discharges in response to a preset detection voltage; and determining whether the electrode to be identified has malfunctioned based on the detected discharge current.

[0015] Optionally, the discharge current includes a first discharge current and a second discharge current, wherein the first discharge current is the current generated by the electrode to be identified and the auxiliary electrode under the action of the detection voltage before the electrode to be identified undergoes purification treatment, and the second discharge current is the current generated by the electrode to be identified and the auxiliary electrode under the action of the detection voltage after the electrode to be identified undergoes purification treatment. Determining whether the electrode to be identified is faulty based on the first discharge current and the second discharge current includes: calculating the integral value of the positive current pulse in any discharge cycle of the first discharge current and the second discharge current to obtain a first total micro-discharge current corresponding to the first discharge current and a second total micro-discharge current corresponding to the second discharge current; comparing the current ratio between the first total micro-discharge current and the second total micro-discharge current with a preset safety threshold range; if the current ratio is within the safety threshold range, then the electrode to be identified is determined to be operating normally; otherwise, the electrode to be identified is faulty.

[0016] Optionally, after determining that the electrode has failed, the electrode failure identification method further includes: determining the failure type and failure severity of the electrode to be identified based on the degree of deviation of the current ratio from the safety threshold range, wherein the corresponding failure types, in ascending order of the degree of deviation, include coking failure on the surface of the plasma electrode, crack failure on the surface of the plasma electrode, fragmentation failure inside the plasma electrode, and continuous liquid water failure between the plasma electrodes, and the greater the degree of deviation, the higher the degree of failure.

[0017] Optionally, the detection voltage is determined by: obtaining the initial discharge voltage of the discharge between the auxiliary electrode and the electrode to be identified; and determining the detection voltage based on the initial discharge voltage and a preset voltage adjustment coefficient.

[0018] Thirdly, embodiments of the present invention provide an electrode fault identification device, the electrode fault detection device comprising: a memory storing a program capable of running on a processor; and the processor configured to implement the electrode fault identification method described in any one of the second aspects above when executing the program.

[0019] Fourthly, embodiments of the present invention provide a machine-readable storage medium storing instructions that cause a machine to perform the electrode fault identification method described in any one of the second aspects above.

[0020] Through the above technical solution, the embodiments of the present invention can realize fault detection of any electrode of the plasma reactor without disassembling the plasma reactor, and introduce current variables to identify electrode faults. Compared with manual judgment, it is more accurate and reliable, and reduces the cycle and cost of manual maintenance, thereby effectively ensuring the long-term stable operation of the plasma reactor.

[0021] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of a plasma reactor according to an exemplary embodiment;

[0024] Figure 2 This is a schematic diagram illustrating an electrode fault identification system according to an exemplary embodiment;

[0025] Figure 3 This is a schematic diagram of another electrode fault identification system according to an exemplary embodiment;

[0026] Figure 4A This is a schematic diagram illustrating the voltage and current waveforms and micro-discharge process of a detection power source that is an AC power source, according to an exemplary embodiment.

[0027] Figure 4B This is a schematic diagram illustrating the voltage and current waveforms and micro-discharge process of a detection power supply that is a pulse power supply, according to an exemplary embodiment.

[0028] Figure 5 This is a schematic flowchart illustrating an electrode fault identification method according to an exemplary embodiment;

[0029] Figure 6 This is a schematic flowchart of another electrode fault identification method according to an exemplary embodiment;

[0030] Figure 7 This is a schematic flowchart illustrating a method for determining a detection voltage according to an exemplary embodiment; and

[0031] Figure 8 This is a schematic diagram illustrating a process for monitoring electrode faults based on different exhaust gas components, according to an exemplary embodiment.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Working power supply; 2. First discharge electrode; 3. Second discharge electrode; 4. Auxiliary electrode; 5. Electrode displacement device; 6. Current detection device; 7. Control device; 8. Detection power supply; 9. Voltage detection device; 11. Barrier medium; 12. Metal electrode; 51. Sliding device; 52. Driving device; 53. Fixing device; K1. Working switch; K2. Working switch; K u Detection switch; K d Detection switch. Detailed Implementation

[0034] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0035] Example 1

[0036] Figure 1 This is a schematic diagram of the structure of a plasma reactor, such as... Figure 1 As shown, the plasma reactor includes a power supply 1 and a discharge electrode pair, wherein the two electrodes of the discharge electrode pair are a first discharge electrode 2 and a second discharge electrode 3, and the power supply 1 is connected to both the first discharge electrode 2 and the second discharge electrode 3. Both the first discharge electrode 2 and the second discharge electrode 3 include a metal electrode 12 and a barrier medium 11. When the power supply 1 applies a working voltage to the first discharge electrode 2 and the second discharge electrode 3, discharge gas is generated in the discharge region between the metal electrodes 12 of each of the first discharge electrode 2 and the second discharge electrode 3. The waste gas introduced into this discharge region is purified by the barrier medium 11, thereby obtaining purified exhaust gas.

[0037] Figure 1 This is just one example of a plasma reactor. Figure 1 The plasma reactor in the present invention includes a set of discharge electrode pairs. The plasma reactor used in the embodiments of the present invention may also include multiple sets of discharge electrode pairs, each set including a first discharge electrode and a second discharge electrode.

[0038] The purpose of this invention is to detect the first or second discharge electrode in any pair of discharge electrodes in a plasma reactor to identify whether the first or second discharge electrode has malfunctioned.

[0039] In view of this, Figure 2This embodiment illustrates a plasma electrode fault identification system applied to a plasma reactor including a discharge electrode. The electrode fault identification system includes: an auxiliary electrode 4, an electrode displacement device 5, a current detection device 6, and a control device 7. The auxiliary electrode 4 is adapted to be installed with the electrode displacement device 5 so that it can move into or out of the discharge region between the two electrodes of the discharge electrode pair with the assistance of the electrode displacement device 5. The current detection device 6 is used to detect the discharge current between the auxiliary electrode 4 and the electrode to be identified when the electrode to be identified in the discharge electrode pair is in a detection state and the auxiliary electrode 4 enters the discharge region. The detection state refers to the state in which the electrode to be identified and the auxiliary electrode 4 discharge in response to a preset detection voltage. The control device 7 is used to determine whether the electrode to be identified has malfunctioned based on the discharge current detected by the current detection device 5.

[0040] For example, in this embodiment of the invention, fault identification is performed on either of the two electrodes (first discharge electrode 2 and second discharge electrode 3) of the discharge electrode pair. The discharge electrode to be identified is the electrode to be identified. The auxiliary electrode 4 refers to an electrode with the same structure and function as the two electrodes in the discharge electrode pair. The materials of the auxiliary electrode 4 and the metal electrodes inside the two discharge electrodes can be metals such as iron, copper, and tungsten, with iron being preferred. The material of the barrier medium on the surface of the auxiliary electrode 4 can be quartz, ceramic, and nylon, with quartz being preferred. Furthermore, the auxiliary electrode 3 and the two discharge electrodes can have a tubular structure or a plate structure, and both can use the same structure. The detection voltage can be provided by a preset detection power supply 8, which is similar to the working power supply 1 of the plasma reactor, and the output power and volume of the detection power supply 8 are smaller than those of the working power supply 1. The output power range of the detection power supply 8 can be approximately 0-100W. The power supply type can include AC power, pulse power, etc., with AC power being preferred.

[0041] The control device 7 can be, but is not limited to, a microcontroller, DSP, PLC, etc. The various devices in the electrode fault identification system of this embodiment can communicate with each other using, but are not limited to, the following methods: 485, 232, CIN, or signal line communication. If signal line communication is used, the signal line should have the ability to shield against high-frequency electromagnetic interference.

[0042] Since the auxiliary electrode has the same structure and function as the two discharge electrodes, it can generate a discharge current with either discharge electrode under the influence of voltage. Taking the first discharge electrode 2 as an example, if the first discharge electrode 2 is in a normal state, it can generate a discharge current with the auxiliary electrode 4 under the influence of a detection voltage. However, if the first discharge electrode 2 malfunctions, the discharge current between it and the auxiliary electrode 4 will change significantly compared to the discharge current between them before the malfunction. Therefore, in this embodiment of the invention, the auxiliary electrode is used as a reference electrode to identify faults in either the first or second discharge electrode.

[0043] In this embodiment of the invention, the electrode fault identification system introduces an auxiliary electrode and identifies whether a discharge electrode has malfunctioned by controlling the discharge state between the auxiliary electrode and the discharge electrode. Furthermore, it uses the discharge current between the discharge electrode and the auxiliary electrode as a reference quantity for fault identification. Compared to existing technologies, the electrode fault identification system of this embodiment can detect discharge electrode faults without affecting the operation of the plasma reactor and without requiring disassembly of the plasma reactor. In addition, the fault identification system has a simple and practical structure, requires no manual fault identification, and effectively improves the accuracy and timeliness of electrode fault identification.

[0044] The structure and function of the electrode fault identification system described above will be further described in detail below.

[0045] In a preferred embodiment, when the auxiliary electrode 4 moves into the discharge region between the first discharge electrode 2 and the second discharge electrode 3, the auxiliary electrode 4 is in a parallel and opposite position to the first discharge electrode 2 and the second discharge electrode 3, and the distance between the auxiliary electrode 4 and the first discharge electrode 2 and the second discharge electrode 3 is the same. When the auxiliary electrode moves into the discharge region, the auxiliary electrode and the first discharge electrode 2 or the second discharge electrode 3 can generate discharge under the action of the detection voltage. In addition, in this embodiment of the invention, in order not to affect the discharge between the auxiliary electrode and the two discharge electrodes and the identification result of electrode faults, the electrode displacement device 5 needs to be in an insulated state from the auxiliary electrode 4.

[0046] In a preferred embodiment, such as Figure 3 As shown, the electrode displacement device 5 includes: a sliding unit 51, including a slide rail penetrating the inside and outside of the discharge region, and the slide rail is used to embed the auxiliary electrode 4; a driving unit 52, used to drive the auxiliary electrode 4 to move along the slide rail; and a fixing unit 53, used to fix the auxiliary electrode 4 outside the discharge region when the auxiliary electrode 4 moves out of the discharge region along the slide rail.

[0047] For example, the sliding unit 51 can use a slide rail or similar structure to move the auxiliary electrode. To allow the auxiliary electrode 4 to move between the discharge area and outside the discharge area, one part of the sliding unit 51 needs to be placed within the discharge area, while the other part needs to be placed outside the discharge area. The lengths of the two parts can be flexibly set according to the actual structural dimensions of the auxiliary electrode 4. The driving unit 52 can use a motor or similar device to drive and control the auxiliary electrode. The driving unit 52 can control the moving speed and direction of the auxiliary electrode 4 on the slide rail of the sliding unit 51. Different fixing structures can be used between the fixing unit 53 and the auxiliary electrode 4. For example, a mutually compatible connecting device can be provided at the contact point between the fixing unit 53 and the auxiliary electrode 4. When the auxiliary electrode 4 moves out of the discharge area and is close to the fixing unit 53, the auxiliary electrode 4 and the fixing unit 53 can connect to each other, achieving a limiting and fixing of the auxiliary electrode 4.

[0048] The aforementioned electrode displacement device enables automatic control of the auxiliary electrode's movement, ensuring precise movement of the auxiliary electrode within and outside the discharge area without manual intervention. Furthermore, the electrode displacement device in this embodiment can also be equipped with a displacement sensor to detect the movement position of the auxiliary electrode, further ensuring the accuracy of the auxiliary electrode's displacement.

[0049] In one implementation, such as Figure 3 As shown, the electrode fault system also includes a voltage detection device 9, which is used to detect the initial discharge voltage between the auxiliary electrode 4 and the electrode to be identified when the electrode to be identified is in the detection state and the auxiliary electrode 4 enters the discharge region; and the control device 7 is also used to determine the detection voltage based on the initial discharge voltage.

[0050] For example, the voltage detection device 9 can use a voltage sensor or similar device to detect voltage. The voltage detection device 9 is connected to the control device 7 and in parallel with a preset detection power supply 8. When the voltage applied across the electrode to be identified and the auxiliary electrode gradually increases to a certain critical value, the air gap between the electrodes is broken down, resulting in a discharge. The instantaneous voltage at the start of the discharge is the initial discharge voltage between the auxiliary electrode and the discharge electrode. Taking the first discharge electrode 2 as an example, the detection process of the initial discharge voltage is as follows: When the auxiliary electrode 4 is located within the discharge region and the first discharge electrode 2 is in the detection state, the detection power supply 8 is activated. The detection power supply 8 gradually increases the detection voltage applied to the auxiliary electrode 4 and the first discharge electrode 2, and the voltage detection device 9 detects the change in the detection voltage applied by the detection power supply 8 to the auxiliary electrode 4 and the first discharge electrode 2 in real time. When it is detected that the auxiliary electrode 4 and the first discharge electrode 2 have started discharging, the detection voltage applied by the detection power supply 8 detected by the voltage detection device 9 at this time is the initial discharge voltage. Furthermore, the voltage detection device 9 sends the detected initial discharge voltage to the control device 7, and the control device 7 determines the detection voltage based on this initial discharge voltage.

[0051] In this embodiment of the invention, the detection voltage is determined using a preset voltage adjustment coefficient. For example, if the detection voltage is V1 and the initial discharge voltage is V0, the detection voltage can be obtained using the following formula:

[0052] V1 = V0 + a

[0053] Where 'a' is the voltage regulation coefficient, which can be arbitrarily selected between 0.5 and 1.5. The units of V1, V0, and 'a' are all kV.

[0054] The aforementioned voltage detection device enables real-time detection of the discharge voltage between the auxiliary electrode and the electrode to be identified, facilitating effective monitoring of the voltage between them. Detecting the initial discharge voltage allows for accurate determination of the voltage between the auxiliary and discharge electrodes, which is beneficial for subsequent accurate detection of the discharge current and improves the precision of electrode fault identification.

[0055] In a preferred embodiment, the electrode fault detection system further includes a switching device (not shown) for switching between the working state and the detection state of the electrode to be identified, wherein the working state of the electrode to be identified refers to the state in which the electrode to be identified discharges in response to a preset working voltage.

[0056] For example, referring to the above, such as Figure 1As shown, when the power supply 1 is started, it applies a working voltage to the first discharge electrode 2 and the second discharge electrode 3. At this time, the first discharge electrode 2 and the second discharge electrode 3 discharge under the preset working voltage, and this discharge state is the working state. Taking the first discharge electrode 2 as the electrode to be identified as an example, when it is necessary to perform fault identification and detection on the first discharge electrode 2, the switching device can switch the first discharge electrode 2 and the second discharge electrode 3 from their working state to the detection state. Specifically, the connection between the first discharge electrode 2 and the power supply 1 is disconnected, and it is connected to the detection power supply 8. The second discharge electrode 3 is disconnected from both the power supply 1 and the detection power supply 8. When the fault identification of the first discharge electrode 2 is completed, and the plasma reactor needs to continue to purify the exhaust gas, the switching device can disconnect the first discharge electrode 2 from the detection power supply 8 and connect it to the power supply 1, so that the first discharge electrode 2 and the second discharge electrode 3 discharge to purify the exhaust gas, thereby completing the process of switching from the detection state to the working state.

[0057] Preferably, the switching device includes a working switch adapted to a working power supply 1 that provides the working voltage, for controlling the power supply of the working power supply 1 to enable or deactivate the working state of the electrode to be identified; and a detection switch adapted to a detection power supply 8 that provides the detection voltage, for controlling the power supply of the detection power supply 8 to enable or deactivate the detection state of the electrode to be identified.

[0058] For example, such as Figure 3 As shown, the operating switches include operating switch K1 and operating switch K2. The detection switches include detection switch K... u and detection switch K d When the detection switch K u and detection switch K d When the power switches K1 and K2 are closed, the first discharge electrode 2 and the second discharge electrode 3 are in operation under the influence of the power supply 1. To perform fault identification and detection on the first discharge electrode 2, the power switches K1 and K2 are opened, and the detection switch K is held open. d Turn on the detection switch K u When the circuit is closed, the first discharge electrode 2 is connected to the detection power supply 8. At this time, the second discharge electrode 3 is disconnected from both the working power supply 1 and the detection power supply 8, and the first discharge electrode 2 is in the detection state. Similarly, to perform fault detection on the second discharge electrode 3, the working switches K1 and K2 are turned on, and the detection switch K is kept open. u Turn on the detection switch K dWhen the circuit is closed, the second discharge electrode 3 is connected to the detection power supply 8. At this time, the first discharge electrode 2 is disconnected from both the working power supply 1 and the detection power supply 8, and the second discharge electrode 3 is in the detection state. In addition, the above-mentioned working switch and detection switch include, but are not limited to, intermediate relays, circuit breakers, contactors, IGBTs, GTOs, MOSFETs and other devices with switching functions.

[0059] It should be noted that the above-described switching device configuration is only a preferred embodiment, and the switching device in this embodiment is not limited to this. Those skilled in the art can also flexibly configure the structure and connection structure of different switching devices according to actual needs to achieve switching between the working state and the detection state.

[0060] In this embodiment of the invention, by setting a switching device, the working state and detection state of the discharge electrode can be flexibly switched in real time to realize fault detection of any discharge electrode.

[0061] In a preferred embodiment, the electrode fault identification system further includes an alarm device (not shown) for issuing an alarm prompt when the control device 7 determines that the electrode to be identified has a fault.

[0062] For example, using an audible alarm, when the control device 7 determines that an electrode has malfunctioned, it will emit an alarm sound to alert on-site personnel. A visual alarm can also be used. For example, with a display screen, when the control device 7 determines that an electrode has malfunctioned, it will display an alarm message to prompt on-site personnel to promptly repair the electrode.

[0063] In this embodiment of the invention, by setting an alarm device, staff can be notified in a timely manner to repair and handle the problem when the electrode malfunctions, thus ensuring the safe operation of the plasma reactor.

[0064] Example 2

[0065] As mentioned in Embodiment 1 above, the present invention identifies electrode faults by using the discharge current between the auxiliary electrode and the electrode to be identified as a reference quantity. The following example will detail the process by which the control device identifies electrode faults based on the discharge current.

[0066] The discharge current includes a first discharge current and a second discharge current. The first discharge current is the current generated by the auxiliary electrode and the electrode to be identified before the electrode to be identified is cleaned under the detection voltage. The second discharge current is the current generated by the auxiliary electrode and the electrode to be identified after the electrode to be identified is cleaned under the detection voltage. The control device is configured to determine whether the electrode to be identified is faulty based on the first discharge current and the second discharge current. This includes: calculating the integral value of the positive current pulse in any discharge cycle of the first discharge current and the second discharge current to obtain a first total micro-discharge current corresponding to the first discharge current and a second total micro-discharge current corresponding to the second discharge current; comparing the current ratio between the first total micro-discharge current and the second total micro-discharge current with a preset safety threshold range; if the current ratio is within the safety threshold range, then the electrode to be identified is determined to be operating normally; otherwise, the electrode to be identified is faulty.

[0067] For example, "before the electrode to be identified undergoes purification treatment" refers to the initial gas being introduced into the plasma reactor before it is put into use, and the two electrodes of the discharge electrode pair are in a state of discharge based on the initial gas being introduced. Figure 3 As shown, for example, assuming the initial gas is air, air is introduced into the plasma reactor, and the auxiliary electrode 4 is moved to the detection position. Then, the current between the discharge electrode and the auxiliary electrode 4 is detected under the action of the detection voltage. Taking the electrode to be identified as the first discharge electrode 2 as an example, the current detection device 6 detects the discharge current between the first discharge electrode 2 and the auxiliary electrode 4 when the first discharge electrode 2 is in the detection state and the auxiliary electrode 4 is located in the discharge area, thus obtaining the first discharge current. After the electrode to be identified is purified, the state in which the waste gas to be treated is introduced into the plasma reactor, and the two electrodes of the discharge electrode pair discharge based on the introduced waste gas to purify the waste gas. Assuming the waste gas to be treated is an odorous gas mainly composed of organic pollutants, after the odorous gas is introduced into the plasma reactor for a period of time, the current detection device 6 detects the discharge current between the first discharge electrode 2 and the auxiliary electrode 4 when the first discharge electrode 2 is in the detection state and the auxiliary electrode is located in the discharge area, thus obtaining the second discharge current.

[0068] As mentioned in the above embodiments, the power supply used by the detection power supply 8 is either an AC power supply or a pulse power supply. Therefore, the control device 7 generates a corresponding current-voltage waveform based on the acquired discharge current. In the current-voltage waveform, the smallest time unit in which the same waveform of the detection voltage and the discharge current reappears is one discharge cycle. For any discharge cycle, the integral value of all positive current pulses within the positive half-cycle of the discharge current is defined as the total micro-discharge current. Combined with... Figure 4A and Figure 4B For further illustration, as Figure 4A and Figure 4B shown, Figure 4A is a current-voltage waveform diagram under an alternating current power supply, Figure 4B is a current-voltage waveform diagram under the action of a pulse power supply. In Figure 4A , pulses 1-27 are positive current pulses, and in Figure 4B , pulses 1-8 are positive current pulses. By separately calculating the integral values of all positive current pulses in Figure 4A and Figure 4B , the corresponding total micro-discharge current is then obtained. For example, let the number of positive pulses in one discharge cycle be n, and the current value of the j-th positive pulse be denoted as i j , then the total micro-discharge current I is obtained by the following formula:

[0069]

[0070] The above is only an example of one discharge cycle. Considering that there is certain instability in the power supply, the embodiment of the present invention can also obtain the total micro-discharge current values of multiple discharge cycles separately, then obtain the average value of the multiple total micro-discharge currents, and further obtain the total micro-discharge current value corresponding to the current detection.

[0071] Through the above method, after acquiring the first total micro-discharge current and the second total micro-discharge current, the control device 7 calculates the current ratio between the first total micro-discharge current and the second total micro-discharge current. For example, taking the electrode to be identified as the first discharge electrode 2, let the first total micro-discharge current be I 11 , the second total micro-discharge current be I 21 , and the current ratio of the two is denoted as Z1, that is Z1=I 21 / I 11 . The upper and lower limit values of the preset safety threshold interval may include a first threshold and a preset second threshold, and the two thresholds are critical values for determining that the discharge electrode is in a normal state. For example, let the first threshold be M1 and the second threshold be M2. If M1≤Z1≤M2, that is, the current ratio is within the safety threshold interval, it is determined that the first discharge electrode 2 is in normal operation. If the current ratio is outside the safety threshold interval, that is Z1<M1 or Z1>M2, it is determined that the first discharge electrode 2 has a fault. Similarly, if the electrode to be identified is the second discharge electrode 3, let the first total micro-discharge current be I 12 , the second total micro-discharge current be I 22 , and the ratio of the two is denoted as Z2, that is Z2=I 12 / I 22 . Similarly, comparison is performed based on the above safety threshold space to determine whether the second discharge electrode 3 has a fault.

[0072] In a preferred embodiment, the fault type and fault severity of the electrode to be identified are determined based on the degree of deviation of the current ratio from the safety threshold range. The corresponding fault types, in ascending order of the degree of deviation, include coking faults on the plasma electrode surface, crack faults on the plasma electrode surface, fragmentation faults inside the plasma electrode, and continuous liquid water faults between plasma electrodes. The greater the degree of deviation, the higher the fault severity.

[0073] For example, embodiments of the present invention can pre-set different thresholds for the fault type and corresponding fault severity of the discharge electrode, and then compare the current ratio with the pre-set different thresholds. After determining that the electrode has failed, the fault type and fault severity of the electrode failure are further determined. The greater the deviation of each threshold from the aforementioned safety threshold space, the higher the fault severity of its corresponding fault type.

[0074] In this embodiment of the invention, the corresponding total micro-discharge current is calculated based on the detected discharge current. The total micro-discharge current is used as a monitoring variable to monitor whether the electrode has failed. This can effectively identify the actual operating state of the discharge electrode of the plasma reactor. After it is determined that the electrode has failed, the fault type and degree of the electrode can be accurately determined, so that the staff can take corresponding measures according to the fault type and degree of the electrode.

[0075] The following section, in conjunction with the above description of the electrode fault identification system, details the fault identification process of the first discharge electrode 2 and the second discharge electrode 3 in the discharge electrode pair.

[0076] Step 1: Before using the plasma reactor, air is introduced between the first discharge electrode 2 and the second discharge electrode 3, and the first discharge electrode 2 and the second discharge electrode 3 are switched from the working state to the detection state respectively. The initial discharge voltage V0 of the first discharge electrode 2 and the second discharge electrode 3 with the auxiliary electrode 4 is obtained respectively. Then, according to the above-mentioned detection voltage V1 = V0 + a, the value of a can be arbitrarily selected between 0.5 and 1.5. The units of V1, V0 and a are all kV.

[0077] Step 2: When the first discharge electrode 2 and the second discharge electrode 3 are in the detection state, maintain the detection voltage of the detection power supply at V0+a, and record the measurement time as t0 (the measurement time is saved together). Obtain the discharge voltage, discharge current, and discharge frequency signals of the first discharge electrode 2, the second discharge electrode 3, and the auxiliary electrode 4, respectively. Based on the waveform change of the discharge current, obtain the first micro-discharge total current of the first discharge electrode 2, the second discharge electrode 3, and the auxiliary electrode 4, denoted as I. 10 and I 20 .

[0078] Step 3: Switch the first discharge electrode 2 and the second discharge electrode 3 from the detection state to the working state respectively. After the plasma reactor has been used, i.e., after the discharge electrodes have purified the incoming waste gas for a period of time, switch the first discharge electrode 2 and the second discharge electrode 3 from the working state to the detection state again. Under the condition of detection voltage V0+a, the measurement time is recorded as t1 (the measurement time is saved together). The total second micro-discharge current of the first discharge electrode 2, the second discharge electrode 3 and the auxiliary electrode 4 is obtained and recorded as I. 11 and I 21 .

[0079] Step 4: At measurement times t0 and t1, based on the first micro-discharge total current I of the first discharge electrode 2 and the auxiliary electrode 4... 10 With the second micro-discharge total current I 11 The ratio of the total micro-discharge current to the total micro-discharge current, Z1, is obtained, i.e., Z1 = I. 11 / I 10 Similarly, the ratio Z2 of the total micro-discharge current of the second discharge electrode 3 and the auxiliary electrode 4 is obtained.

[0080] Step 5: Compare the current ratios Z1 and Z2 with the fault type comparison table (Table 1) to determine whether the first discharge electrode 2 and the second discharge electrode 3 have failed.

[0081] Table 1

[0082]

[0083]

[0084] As shown in Table 1 above, the first and second thresholds for determining whether an electrode is functioning normally are 0.85 and 1.15, respectively, meaning the safe threshold range is 0.85-1.15. When the current ratio is within this safe threshold range, the electrode is considered to be operating normally. When the current ratio is outside this safe threshold range, the electrode is considered to have failed. Furthermore, as shown in Table 1 above, in order to determine the type of electrode failure when it occurs, this embodiment of the invention sets different thresholds for different failure types. By comparing the current ratio with different thresholds, the type of electrode failure is determined, and a corresponding processing plan can be determined based on the different failure types. For example, when the current ratio is between 0.65 and 0.85, the electrode fault type is determined to be a small amount of coking on the surface of the plasma electrode blocking medium; when the current ratio is between 0 and 0.65, the electrode fault type is a large amount of coking on the surface of the plasma electrode blocking medium; when the current ratio is 0, the electrode fault type is determined to be the fragmentation of the plasma electrode blocking medium, with a large amount of metal powder / particles spilling out from the electrode cavity; when the current ratio is between 1.15 and 1.65, the electrode fault type is determined to be a large number of deep cracks on the outer surface of the plasma electrode blocking medium; when the current ratio is between 1.65 and 2.45, the electrode fault type is determined to be the presence of liquid water near the plasma electrode; when the current ratio is greater than 2.45, the electrode fault type is determined to be the fragmentation of the plasma electrode blocking medium, with the internal metal electrode exposed to gas. Furthermore, as can be seen from Table 1 above, different treatment schemes are given for different fault types.

[0085] The fault type settings are not limited to the above-mentioned types. In this embodiment of the invention, different threshold ranges can also be set according to other fault types to identify and detect electrode faults in a more refined and comprehensive manner.

[0086] Furthermore, the number of discharge electrodes and auxiliary electrodes, as well as the measurement time, involved in the electrode fault identification system of the above embodiments should not be limited to one set of electrodes and one set of measurement time. For example, suppose a plasma reactor includes N sets of discharge electrode pairs. Then, the electrode fault identification system would configure N auxiliary electrodes corresponding to the N sets of discharge electrode pairs. Alternatively, only one auxiliary electrode can be configured, which can be moved between two discharge electrodes of the N sets of discharge electrode pairs with the assistance of an electrode displacement device, so as to realize fault detection for the two discharge electrodes of the N sets of discharge electrode pairs respectively.

[0087] As can be seen from the above identification process for electrode fault identification, the electrode fault identification system of this embodiment can detect faults in the discharge electrode without affecting the operation of the plasma reactor, and can determine the specific fault type corresponding to the discharge electrode when a fault occurs based on setting different thresholds, and can take different processing solutions for different fault conditions of the discharge electrode.

[0088] Example 3

[0089] Figure 5 This is a schematic flowchart illustrating an electrode fault identification method according to an exemplary embodiment. The electrode fault identification method is applied to a plasma reactor with a discharge electrode pair, and the method is based on an auxiliary electrode, wherein the auxiliary electrode is movable into or out of the discharge region between two electrodes in the discharge electrode pair. Figure 5 As shown, the electrode fault identification method includes the following steps:

[0090] Step S510: Obtain the discharge current between the auxiliary electrode and the electrode to be identified when the electrode to be identified in the discharge electrode pair is in a detection state and the auxiliary electrode enters the discharge region, wherein the detection state refers to the state in which the electrode to be identified discharges in response to a preset detection voltage.

[0091] Step S520: Determine whether the electrode to be identified is faulty based on the detected discharge current.

[0092] In a preferred embodiment, the discharge current includes a first discharge current and a second discharge current, wherein the first discharge current is the current generated between the electrode to be identified and the auxiliary electrode under the action of a detection voltage before the electrode to be identified undergoes purification treatment, and the second discharge current is the current generated between the electrode to be identified and the auxiliary electrode under the action of a detection voltage after the electrode to be identified undergoes purification treatment. Figure 6 As shown, determining whether the discharge electrode has failed based on the first discharge current and the second discharge current includes the following steps:

[0093] Step S610: Calculate the integral value of the positive pulse current under any discharge cycle of the first discharge current and the second discharge current to obtain the first total micro-discharge current corresponding to the first discharge current and the second total micro-discharge current corresponding to the second discharge current.

[0094] Step S620: Compare the current ratio between the first total micro-discharge current and the second total micro-discharge current with a preset safety threshold range. If the current ratio is within the safety threshold range, it is determined that the electrode to be identified is operating normally; otherwise, the electrode to be identified has malfunctioned.

[0095] In a preferred embodiment, after determining that an electrode has failed, the fault type and degree of the fault of the electrode to be identified are determined according to the degree of deviation of the current ratio from the safe threshold range. The fault types, in order of increasing deviation, include coking faults on the plasma electrode surface, crack faults on the plasma electrode surface, fragmentation faults inside the plasma electrode, and continuous liquid water faults between plasma electrodes. The greater the deviation, the higher the degree of fault.

[0096] In a preferred embodiment, such as Figure 7 As shown, the detection voltage is determined in the following manner:

[0097] Step S710: Obtain the starting discharge voltage of the discharge between the auxiliary electrode and the electrode to be identified.

[0098] Step S720: Determine the detection voltage based on the initial discharge voltage and the preset voltage adjustment coefficient.

[0099] The specific implementation details and technical effects of the electrode fault identification method in this invention can be found in the above-described embodiments of the electrode fault system, and will not be repeated here.

[0100] Example 4

[0101] This embodiment of the invention is an example of identifying coking faults on the surface of a plasma electrode.

[0102] In this embodiment of the invention, the plasma reactor adopts a tubular structure with a discharge disk measuring 50cm*30cm. It includes 21 electrodes arranged in a row, with high-voltage and grounding electrodes interleaved. Each electrode has a length of 36cm and a diameter of 1cm. The electrode tubes are made of quartz and filled with iron powder. The exhaust gas consists of toluene with a concentration of 248-367ppm and a flow rate of 300±50m³. 3 / h. During the degradation of toluene, char-like substances gradually accumulate on the surface of the electrode tube. Electrode m can be arbitrarily selected between 1 and 21. The normal detection frequency of the electrode is once every 10 days. When the ratio of the total micro-discharge current of the electrode is lower than 0.65, the abnormal detection frequency of the electrode is changed to once every 5 days. The normal detection frequency and abnormal detection frequency can be set according to the operating conditions. Figure 8As shown, in this embodiment, m=3 is selected, and electrode 3 is determined as the electrode to be identified. Following the identification process of the above embodiment, the change in the current ratio Z3 of the total micro-discharge current of electrode 3 with operating time during plasma degradation of toluene was obtained. When the electrode operated for 60 days, the current ratio of the total micro-discharge current was less than 0.85, and the detection frequency was changed from once every 10 days to once every 5 days; when the electrode operated for 80 days, the current ratio of the total micro-discharge current was less than 0.65. Among the 21 electrodes, when the current ratio of the total micro-discharge current of more than 15 electrodes was less than 0.65, the device was shut down, the removed plasma generator electrode surfaces were cleaned, reinstalled into the device, and the device was restarted to continue degrading the waste gas.

[0103] Example 5

[0104] This invention provides an example of identifying faults such as cracks on the surface of a plasma electrode.

[0105] In this embodiment of the invention, the plasma reactor adopts a tubular structure with a discharge disk measuring 50cm*30cm. It includes 21 electrodes arranged in a row, with high-voltage and grounding electrodes alternately distributed. Each electrode has a length of 36cm and a diameter of 1cm. The electrode tubes are made of quartz and filled with iron powder. The exhaust gas consists of ethylene with a concentration of 385-512ppm and a flow rate of 440±20m³. 3 / h. During the ethylene degradation process, coking on the electrode tube surface is not significant. Electrode m can be arbitrarily selected between 1 and 21. The normal detection frequency for the electrode is once every 10 days, and the detection frequency can be set according to operating conditions. For example... Figure 8 As shown in this embodiment, m=8 is selected, and electrode number 8 is determined as the electrode to be identified. Following the identification process of the above embodiment, the change of the current ratio Z8 of the total micro-discharge current of electrode number 8 with the operating time during plasma degradation of ethylene was obtained. When the electrode had been running for 160 days, the current ratio of the total micro-discharge current was greater than 1.15. Among the 21 electrodes, when the current ratio of the total micro-discharge current of more than 10 electrodes was greater than 1.15, the plasma generator with the cracked electrode was removed, replaced with a new plasma generator, reinstalled in the device, and the device was started to continue degrading the waste gas.

[0106] Example 6

[0107] This invention provides an example of identifying a fault involving the breakage of a plasma electrode (containing metal powder).

[0108] In this embodiment of the invention, the plasma reactor adopts a tubular structure with a discharge disk measuring 50cm*30cm. It includes 21 electrodes arranged in a row, with high-voltage and grounding electrodes alternately distributed. Each electrode has a length of 36cm and a diameter of 1cm. The electrode tubes are made of quartz and filled with iron powder. The exhaust gas consists of propylene with a concentration of 275-343ppm and a flow rate of 510±30m³. 3 / h. During propylene degradation, coking on the electrode tube surface is not significant. Electrode m can be arbitrarily selected between 1 and 21. The normal detection frequency for the electrode is once every 20 days, and the detection frequency can be set according to operating conditions. For example... Figure 8 As shown in this embodiment, m=15 is selected, and electrode 15 is determined as the electrode to be identified. Following the identification process of the above embodiment, the current ratio Z of the total micro-discharge current of electrode 15 during plasma degradation of ethylene is obtained. 15 As the operating time changes, the current ratio of the total micro-discharge current is 1.14 after 140 days of operation; it will be 0 after 160 days. If the current ratio of the total micro-discharge current for any of the 21 electrodes drops to 0, the plasma generator that broke will be removed, replaced with a new one, reinstalled into the device, and the device will be restarted to continue degrading the waste gas.

[0109] Example 7

[0110] This invention provides an example of identifying a fault in a plasma electrode (containing a metal column) that has fractured.

[0111] In this embodiment of the invention, the plasma reactor adopts a tubular structure with a discharge disk measuring 50cm*30cm. It includes 21 electrodes arranged in a row, with high-voltage and grounding electrodes alternately distributed. Each electrode has a length of 36cm and a diameter of 1cm. The electrode tubes are made of quartz and filled with iron columns. The exhaust gas consists of propylene with a concentration of 386-431ppm and a flow rate of 380±40m³. 3 / h. During the degradation of 1-butene, coking on the electrode tube surface is not significant. Electrode m can be arbitrarily selected between 1 and 21. The normal detection frequency for the electrode is once every 20 days, and the detection frequency can be set according to operating conditions. For example... Figure 8 As shown in this embodiment, m=18 is selected, and electrode 18 is determined as the electrode to be identified. Following the identification process of the above embodiment, the current ratio Z of the total micro-discharge current of electrode 18 during plasma degradation of ethylene is obtained. 18As the operating time varied, the current ratio of the total micro-discharge current was 1.13 after 140 days of operation, and 3.68 after 160 days. If the current ratio of the total micro-discharge current for any of the 21 electrodes exceeded 2.45, the plasma generator that had broken was removed, replaced with a new plasma generator, reinstalled into the device, and the device was restarted to continue degrading the waste gas.

[0112] Example 8

[0113] This invention provides an example of identifying a fault involving the presence of continuous liquid water between plasma electrodes.

[0114] In this embodiment of the invention, the plasma reactor adopts a tubular structure with a discharge disk measuring 50cm*30cm. It includes 21 electrodes arranged in a row, with high-voltage and grounding electrodes alternately distributed. Each electrode has a length of 36cm and a diameter of 1cm. The electrode tubes are made of quartz and filled with iron powder. The exhaust gas consists of formaldehyde at a concentration of 177-218ppm and a flow rate of 320±30m³. 3 / h. During the degradation of 1-butene, coking on the electrode tube surface is not significant. Electrode m can be arbitrarily selected between 1 and 21. The normal detection frequency for the electrode is once every 10 days, and the detection frequency can be set according to operating conditions. For example... Figure 8 As shown, in this embodiment, m = 20 is selected, and electrode 20 is determined as the electrode to be identified. Following the identification process described in the above embodiment, the current ratio Z of the total micro-discharge current of electrode 20 during plasma degradation of ethylene is obtained. 20 As the operating time varied, the current ratio of the total micro-discharge current was 0.88 after 120 days of operation, and 2.19 after 130 days. If the current ratio of the total micro-discharge current for any of the 21 electrodes fell within the range of 1.65 to 2.45, the unit was shut down. The reactor seepage point was located, the problem was resolved, and the unit was restarted to continue degrading the waste gas.

[0115] Example 9

[0116] This invention provides an electrode fault identification device, which includes: a memory storing a program that can run on a processor; and a processor configured to implement the electrode fault identification method of the above embodiments when executing the program.

[0117] Example 10

[0118] This invention provides a machine-readable storage medium storing instructions that cause a machine to execute the electrode fault identification method described in the above embodiments.

[0119] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and adjusting kernel parameters can help identify electrode faults.

[0120] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0121] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it identifies electrode faults. The device described herein can be a server, PC, tablet, mobile phone, etc.

[0122] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0123] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0124] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0125] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0126] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0127] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0128] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0129] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0130] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An electrode fault identification system, characterized in that, The electrode fault identification system is applied to a plasma reactor including a discharge electrode pair, and includes: an auxiliary electrode, an electrode displacement device, a current detection device, and a control device, wherein... The auxiliary electrode is adapted to be installed with the electrode displacement device so that it can be moved into or out of the discharge region between the two electrodes of the discharge electrode pair with the assistance of the electrode displacement device. The current detection device is used to detect the discharge current of the auxiliary electrode and the electrode to be identified when the electrode to be identified in the discharge electrode pair is in the detection state and the auxiliary electrode enters the discharge region, wherein the detection state refers to the state in which the electrode to be identified discharges in response to a preset detection voltage. The control device is used to determine whether the electrode to be identified is faulty based on the discharge current detected by the current detection device. The discharge current includes a first discharge current and a second discharge current, wherein the first discharge current is the current generated by the auxiliary electrode and the electrode to be identified before the electrode to be identified is purified under the action of the detection voltage, and the second discharge current is the current generated by the auxiliary electrode and the electrode to be identified after the electrode to be identified is purified under the action of the detection voltage. Furthermore, the control device is used to determine whether the electrode to be identified has malfunctioned based on the first discharge current and the second discharge current, including: Calculate the integral value of the positive current pulse under any discharge cycle of the first discharge current and the second discharge current respectively to obtain the first micro-discharge total current corresponding to the first discharge current and the second micro-discharge total current corresponding to the second discharge current; The ratio of the first total micro-discharge current to the second total micro-discharge current is compared with a preset safety threshold range. If the current ratio is within the safety threshold range, the electrode to be identified is determined to be operating normally; otherwise, the electrode to be identified has malfunctioned.

2. The electrode fault identification system according to claim 1, characterized in that, When the auxiliary electrode is within the discharge region, the auxiliary electrode is parallel to and opposite the two electrodes of the discharge electrode, and the distance between the auxiliary electrode and the two electrodes is the same.

3. The electrode fault identification system according to claim 1, characterized in that, The electrode displacement device includes: The sliding unit includes a slide rail that runs through the inside and outside of the discharge region, and the slide rail is used to embed the auxiliary electrode. A driving unit is used to drive the auxiliary electrode to move along the slide rail; A fixing unit is used to fix the auxiliary electrode outside the discharge region when the auxiliary electrode moves out of the discharge region along the slide.

4. The electrode fault identification system according to claim 1, characterized in that, The electrode fault identification system also includes: A voltage detection device is used to detect the initial discharge voltage between the auxiliary electrode and the electrode to be identified when the electrode to be identified is in a detection state and the auxiliary electrode enters the discharge region. Furthermore, the control device is also used to determine the detection voltage based on the initial discharge voltage.

5. The electrode fault identification system according to claim 1, characterized in that, The electrode fault detection system also includes: A switching device is used to switch the working state and detection state of the electrode to be identified, wherein the working state of the electrode to be identified refers to the state in which the electrode to be identified discharges in response to a preset working voltage.

6. The electrode fault identification system according to claim 5, characterized in that, The switching device includes: A working switch, adapted to a power supply providing the working voltage, is used to control the power supply to activate or deactivate the electrode to be identified; and A detection switch, adapted to a detection power supply setting that provides the detection voltage, is used to enable or deactivate the detection state of the electrode to be identified by controlling the power supply of the detection power supply.

7. The electrode fault identification system according to claim 1, characterized in that, The electrode fault identification system also includes an alarm device for issuing an alarm when the control device determines that the electrode to be identified has a fault.

8. The electrode fault identification system according to claim 1, characterized in that, After determining that the electrode has failed, the control device is further configured to: Based on the degree of deviation of the current ratio from the safe threshold range, the fault type and degree of the fault of the electrode to be identified are determined. The corresponding fault types, ordered from smallest to largest deviation, include coking faults on the surface of the plasma electrode, crack faults on the surface of the plasma electrode, fragmentation faults inside the plasma electrode, and continuous liquid water faults between the plasma electrodes. The greater the deviation, the higher the degree of the fault.

9. A method for identifying electrode faults, characterized in that, The electrode fault identification method is applied to a plasma reactor with a discharge electrode pair, and the method is based on an auxiliary electrode, wherein the auxiliary electrode is movable into or out of the discharge region between two electrodes in the discharge electrode pair, and the method includes: The discharge current between the auxiliary electrode and the electrode to be identified is acquired when the electrode to be identified in the discharge electrode pair is in a detection state and the auxiliary electrode enters the discharge region, wherein the detection state refers to the state in which the electrode to be identified discharges in response to a preset detection voltage; and Based on the detected discharge current, determine whether the electrode to be identified is faulty; The discharge current includes a first discharge current and a second discharge current, wherein the first discharge current is the current generated by the auxiliary electrode and the electrode to be identified before the electrode to be identified is purified under the action of the detection voltage, and the second discharge current is the current generated by the auxiliary electrode and the electrode to be identified after the electrode to be identified is purified under the action of the detection voltage. Furthermore, determining whether the electrode to be identified is faulty based on the first discharge current and the second discharge current includes: Calculate the integral value of the positive current pulse under any discharge cycle of the first discharge current and the second discharge current respectively to obtain the first micro-discharge total current corresponding to the first discharge current and the second micro-discharge total current corresponding to the second discharge current; The ratio of the first total micro-discharge current to the second total micro-discharge current is compared with a preset safety threshold range. If the current ratio is within the safety threshold range, the electrode to be identified is determined to be operating normally; otherwise, the electrode to be identified has malfunctioned.

10. The electrode fault identification method according to claim 9, characterized in that, After determining that the electrode has failed, the electrode failure identification method further includes: Based on the degree of deviation of the current ratio from the safe threshold range, the fault type and degree of the fault of the electrode to be identified are determined. The corresponding fault types, ordered from smallest to largest deviation, include coking faults on the surface of the plasma electrode, crack faults on the surface of the plasma electrode, fragmentation faults inside the plasma electrode, and continuous liquid water faults between the plasma electrodes. The greater the deviation, the higher the degree of the fault.

11. The electrode fault identification method according to claim 9, characterized in that, The detection voltage is determined in the following manner: Obtain the initial discharge voltage of the discharge between the auxiliary electrode and the electrode to be identified; The detection voltage is determined based on the initial discharge voltage and the preset voltage adjustment coefficient.

12. An electrode fault identification device, characterized in that, The electrode fault identification device includes: Memory, which stores programs that can run on a processor; and The processor is configured to implement the electrode fault identification method according to any one of claims 9-11 when executing the program.

13. A machine-readable storage medium storing instructions for causing a machine to perform the electrode fault identification method according to any one of claims 9-11.

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