FGD demister flushing method and system based on differential pressure detection

Abstract

The present application relates to the technical field of demister flushing, and discloses a FGD demister flushing method and system based on differential pressure detection, which comprises the following steps: obtaining equipment state data, judging whether the demister flushing condition is met, and if not, performing state early warning; if the flushing condition is met, detecting and scanning the differential pressure values of each layer of demister, establishing an abnormal layer and a detection queue; detecting the detection queue in order, establishing an abnormal queue if there is an abnormal value, and flushing each layer of demister in the abnormal queue; and if there is no abnormal value in the detection queue, flushing the abnormal layer. The present application effectively solves the problems of energy consumption, time consumption and labor consumption of the traditional method, and sets up relevant fault protection by using automatic fixed-point flushing, can compare and judge the data collected by each detection instrument with the set value, and if the value exceeds the calibrated range, an early warning signal is sent, thereby providing protection for the stable operation of the demister.

Description

Technical Field

[0001] This invention relates to the field of demister flushing technology, and in particular to an FGD demister flushing method and system based on differential pressure detection. Background Technology

[0002] The absorber tower demister is one of the important pieces of equipment in FGD (Fluorescent Gas Deposition). It is mainly used to remove liquid droplets carried by the flue gas in the absorber tower, thereby reducing the corrosion and pollution of downstream equipment by the droplets. Traditional demister flushing is done manually and periodically based on the differential pressure change of the demister. This method has problems such as uneven flushing, low flushing efficiency, high flushing energy consumption, and waste of water resources. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the aforementioned existing problems, this invention is proposed. Therefore, this invention provides an FGD demister flushing method based on differential pressure detection to solve the problems of uneven flushing, low flushing efficiency, high flushing energy consumption, and water waste.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides an FGD demister flushing method based on differential pressure detection, comprising: acquiring equipment status data, determining whether the demister flushing conditions are met, and if the flushing conditions are not met, issuing a status warning.

[0007] If the flushing conditions are met, the differential pressure values ​​of each layer of demisters are scanned and detected to establish abnormal layers and detection queues.

[0008] The detection queue is tested sequentially. If an abnormal value is found, an abnormal queue is established, and each layer of demister in the abnormal queue is flushed.

[0009] If there are no outliers in the detection queue, the outlier layer is flushed. After flushing, the differential pressure detection of each layer is repeated for the next round of flushing.

[0010] As a preferred embodiment of the FGD demister flushing method based on differential pressure detection described in this invention, the following steps are taken: acquiring equipment status data and determining whether the demister flushing conditions are met include:

[0011] Acquire the liquid level value of the absorption tower and the status and operation data of the demister water flushing equipment;

[0012] Flushing condition one: Determine whether the liquid level in the absorption tower is lower than the preset liquid level. If it is lower than the preset liquid level, then flushing condition one is met.

[0013] Flushing condition two: Detect the status and operation data of the demister water washing equipment. If the demister is in a fault-free state, all valves are in the initial closed state, and the data status of all detection instruments is within the normal range, then flushing condition two is satisfied.

[0014] If both flushing condition one and flushing condition two are met simultaneously, then the demister flushing condition is met.

[0015] As a preferred embodiment of the FGD demister flushing method based on differential pressure detection described in this invention, the following condition warning is provided if the flushing conditions are not met:

[0016] If flushing condition one is not met, the system will enter protection stop mode and stop flushing.

[0017] If flushing condition two is not met, then check if the demister is faulty. If a fault exists, the demister enters a fault alarm state and demister flushing is prohibited. If no fault exists, then re-evaluate whether the demister flushing condition is met.

[0018] As a preferred embodiment of the FGD demister flushing method based on differential pressure detection described in this invention, the establishment of the abnormal layer and the detection queue includes:

[0019] Simultaneously, the differential pressure values ​​of each layer of demisters are detected, and an abnormal layer x and a detection queue Q1 are established;

[0020] When the differential pressure value of layer x is abnormal, an abnormal layer x is established. The abnormal differential pressure value of layer x includes:

[0021] Abnormal condition one: The actual differential pressure value is less than the differential pressure set value or the actual differential pressure value is greater than the differential pressure set value. Abnormal condition two: Abnormal condition one is met and the detection duration is greater than or equal to the preset abnormal time.

[0022] As a preferred embodiment of the FGD demister flushing method based on differential pressure detection described in this invention, establishing the detection queue Q1 includes:

[0023] A queue is established from the layer before the anomaly layer x to the first layer, generating the detection queue Q1.

[0024] As a preferred embodiment of the FGD demister flushing method based on differential pressure detection described in this invention, the establishment of the anomaly queue includes:

[0025] The detection queue Q1 is detected in descending order. If there are outliers in the detection queue Q1, an outlier queue Q2 is established, and the outlier level is added to the outlier queue Q2 (1,2,...,m).

[0026] Among them, the first abnormal layer in the abnormal queue Q2 corresponds to the abnormal layer with the smallest layer value, and the m-th abnormal layer corresponds to the abnormal layer with the largest layer number.

[0027] The abnormal queue Q2 is flushed according to the order of the queue from front to back.

[0028] As a preferred embodiment of the FGD demister flushing method based on differential pressure detection described in this invention, the flushing of the abnormal layer includes:

[0029] Get the demister status of the current layer;

[0030] Establish a flushing queue Q3 for demisters, and add demisters in normal condition to the flushing queue Q3 according to their position order;

[0031] Check the flushing queue Q3. If the flushing queue Q3 is completely empty, trigger the fault alarm for the current layer and end the flushing process for the current layer.

[0032] If the flushing queue Q3 is not empty, and the number of demisters in the flushing queue Q3 is equal to the number of demisters in the current layer, then the demisters in the current layer are flushed one by one according to the queue order in the flushing queue Q3.

[0033] If the number of demisters in the flushing queue Q3 is not equal to the number of demisters in that layer, an alarm is triggered for the demisters not in the flushing queue Q3, and then the demisters in the flushing queue Q3 are flushed according to the queue order.

[0034] Secondly, the present invention provides an FGD demister flushing system based on differential pressure detection, comprising:

[0035] The judgment module is used to acquire equipment status data and determine whether the demister flushing conditions are met. If the flushing conditions are not met, a status warning is issued.

[0036] The detection module is used to scan the differential pressure values ​​of each layer of demisters if the flushing conditions are met, and to establish abnormal layers and detection queues.

[0037] The first flushing module is used to sequentially detect the detection queue. If there are abnormal values, an abnormal queue is established, and each layer of demister in the abnormal queue is flushed.

[0038] The second flushing module is used to flush the abnormal layer if there are no abnormal values ​​in the detection queue. After flushing, the differential pressure detection of each layer is repeated to perform the next round of flushing.

[0039] Thirdly, the present invention provides an electronic device, comprising:

[0040] Memory and processor;

[0041] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, they implement the steps of the FGD demister flushing method based on differential pressure detection.

[0042] Fourthly, the present invention provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the steps of the FGD demister flushing method based on differential pressure detection.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows: By introducing differential pressure detection and automatic control algorithms, the present invention effectively solves the problems of energy consumption, time consumption and manpower consumption of traditional methods. The present invention adopts automatic fixed-point flushing and sets up relevant fault protection. It can compare and judge the data collected by each detection instrument with the set value. If it exceeds the calibrated range, it will issue a warning signal, thus ensuring the stable operation of the demister. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the overall process of the FGD demister flushing method based on differential pressure detection according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the specific algorithm flow of the FGD demister flushing method based on differential pressure detection according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the start-up and operation flushing conditions of the FGD demister flushing method based on differential pressure detection according to an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the demister flushing process for each layer of the FGD demister based on differential pressure detection according to an embodiment of the present invention.

[0049] Figure 5 This is a schematic diagram of the process water pressure and flow rate control based on the PID algorithm in the FGD demister flushing method based on differential pressure detection according to an embodiment of the present invention. Detailed Implementation

[0050] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0051] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0052] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0053] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0054] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] Reference Figures 1-5 As an embodiment of the present invention, a flushing method for an FGD demister based on differential pressure detection is provided, such as... Figure 1 As shown, it includes:

[0057] S101: Obtain equipment status data and determine whether the demister flushing conditions are met. If the flushing conditions are not met, issue a status warning.

[0058] S102, if the flushing conditions are met, the differential pressure values ​​of each layer of demisters are detected and scanned to establish abnormal layers and detection queues.

[0059] S103, the detection queue is detected in sequence. If there are abnormal values, an abnormal queue is established and each layer of demister in the abnormal queue is flushed.

[0060] S104. If there are no abnormal values ​​in the detection queue, the abnormal layer is flushed. After flushing, the differential pressure detection of each layer is repeated to perform the next round of flushing.

[0061] It should be noted that the differential pressure value of the demister helps to detect the operating status and blockage of the demister. The differential pressure value of the demister is an important indicator of the operating status of the demister. By detecting the flue gas pressure values ​​entering and leaving the demister, the flue gas differential pressure value of the demister can be calculated. During the use of the demister, as particulate matter in the flue gas accumulates, the differential pressure value will gradually increase. When the differential pressure value of the demister exceeds the design value, the following hazards may occur: 1) Affecting the demisting effect: Excessive differential pressure indicates that the demister may have problems such as blockage or scaling, which will reduce the flue gas flow area of ​​the demister and increase the flue gas velocity. On the one hand, high-velocity flue gas may carry a large amount of slurry into subsequent equipment, such as causing blockage of the GGH (gas-to-gas heat exchanger) heat exchange elements, affecting flue gas heat exchange, causing a drop in the clean flue gas temperature, and accelerating the corrosion rate of the flue and equipment at the tail end of the absorption tower. On the other hand, the demisting effect deteriorates, the amount of water droplets carried in the clean flue gas increases, and the drainage volume of the horizontal flue drain pipe at the chimney inlet is large, which will cause corrosion to the clean flue and other equipment. At the same time, the flue dust carries gypsum particles, producing gypsum rain. 2) Increased system resistance: Excessive differential pressure of the demister means an increase in the resistance of the entire FGD system, which will cause the induced draft fan to overcome greater resistance to drive the flue gas flow, thereby increasing the power consumption of the induced draft fan and increasing operating costs. 3) Threat to equipment safety: When the differential pressure of the demister is too large and lasts for a long time, the surface of the demister element may be covered with gypsum and other substances, which can easily cause the demister element to be overloaded, or even collapse and be damaged, which may affect the normal operation of the entire desulfurization system. 4) Impact on measurement accuracy: Excessive differential pressure may cause blockage in the demister differential pressure sampling pipeline, resulting in measurement errors. This affects operators' accurate judgment of the actual operating status of the demister and hinders timely and effective countermeasures.

[0062] Based on differential pressure detection of each demister layer, flushing according to different differential pressures can reduce flushing energy consumption and improve flushing efficiency. The flushing pressure and time can be adjusted according to the actual differential pressure of each demister layer on-site, achieving intelligent combined flushing. This reduces energy consumption and helps maintain FGD water balance. Simultaneously, the flushing method of this invention, utilizing a frequency-controlled flushing pump, can adjust the pump's operating frequency according to changes in demister differential pressure, ensuring flushing pressure and water volume, and improving flushing efficiency. This reduces damage to the demister caused by excessive water pressure and avoids poor flushing results due to insufficient water pressure. The flushing effect can be evaluated in real time based on the real-time changes in differential pressure during the flushing process.

[0063] Preferably, in step S101, acquiring equipment status data and determining whether the demister flushing conditions are met includes:

[0064] Acquire the liquid level value of the absorption tower and the status and operation data of the demister water flushing equipment;

[0065] Flushing condition one: Determine if the liquid level in the absorption tower is lower than the preset liquid level. If it is lower than the preset liquid level, then flushing condition one is met.

[0066] Flushing condition two: Check the status and operation data of the demister water washing equipment. If the demister is in a fault-free state, all valves are in the initial closed state, and the data of all detection instruments are within the normal range, then flushing condition two is met. Among them, the data of each detection instrument includes, but is not limited to, water pressure, differential pressure, flow rate, and current.

[0067] If both flushing condition one and flushing condition two are met simultaneously, then the demister flushing condition is met.

[0068] Preferably, if the rinsing conditions are not met, a status warning is issued, including:

[0069] If flushing condition one is not met, the system will enter protection stop mode and stop flushing.

[0070] If flushing condition two is not met, then check if the demister is faulty. If a fault exists, the demister enters a fault alarm state and demister flushing is prohibited. If no fault exists, then re-evaluate whether the demister flushing condition is met.

[0071] Specifically, if all the above conditions are met, the system enters the start-up preparation stage; otherwise, it checks whether the demister is faulty. If flushing condition one is not met, the equipment enters the protection stop mode and stops the subsequent flushing work to prevent the water balance of the absorption tower from being disrupted. If flushing condition two is not met, the equipment will not enter the flushing state, and an early warning will be issued in the DCS control system to remind the monitoring personnel to handle the abnormality. If there is no fault, the system will recheck whether the demister flushing conditions are met.

[0072] Therefore, rinsing meets the following conditions: Figure 2 As shown, flushing shall be performed if and only if a. the actual value of the absorption tower is lower than the set value; b. the detection instrument is normal; and c. the flushing water pump is operating normally; otherwise, flushing shall be locked.

[0073] Preferably, in step S102, establishing the anomaly layer and detection queue includes:

[0074] Simultaneously, the differential pressure values ​​of each layer of demisters are detected, and an abnormal layer x and a detection queue Q1 are established;

[0075] When the differential pressure value of layer x is abnormal, an abnormal layer x is established. The abnormal differential pressure value of layer x includes:

[0076] Abnormal condition one: The actual differential pressure value is less than the differential pressure set value or the actual differential pressure value is greater than the differential pressure set value. Abnormal condition two: Abnormal condition one is met and the detection duration is greater than or equal to the preset abnormal time.

[0077] Specifically, the differential pressure value of each layer of demister is detected and scanned. Since each layer of demister is equipped with a differential pressure detection device, the differential pressure value of each layer is detected simultaneously and in real time.

[0078] Preferably, establishing the detection queue Q1 includes:

[0079] While establishing the anomaly layer x, a queue is created from the layer before the anomaly layer x to the first layer, generating a detection queue Q1.

[0080] Preferably, in step S103, establishing the exception queue includes:

[0081] The detection queue Q1 is checked in descending order. If there are outliers in the detection queue Q1, an outlier queue Q2 is created and the outlier level is added to the outlier queue Q2(1,2,...,m).

[0082] Among them, the first abnormal layer in the abnormal queue Q2 corresponds to the abnormal layer with the smallest layer value, and the m-th abnormal layer corresponds to the abnormal layer with the largest layer number.

[0083] For the exception queue Q2, flush it according to the order of the queue from front to back, that is, flush it in the order of exception layer 1, exception layer 2... exception layer m.

[0084] Preferred, such as Figure 3 As shown, flushing the abnormal layer x includes:

[0085] Get the demister status of the current layer;

[0086] Establish a flushing queue Q3 for demisters, and add demisters in normal condition to the flushing queue Q3 according to their position order;

[0087] Check flushing queue Q3. If flushing queue Q3 is completely empty, trigger the fault alarm for the current layer and end the flushing process for the current layer.

[0088] If the flushing queue Q3 is not empty, and the number of demisters in the flushing queue Q3 is equal to the number of demisters in the current layer, then the demisters in the current layer are flushed one by one according to the queue order in the flushing queue Q3.

[0089] If the number of demisters in flushing queue Q3 is not equal to the number of demisters in that layer, then an alarm is triggered for the demisters not in flushing queue Q3, and then the demisters in flushing queue Q3 are flushed according to the queue order.

[0090] It should be noted that the process water pressure and flow rate control based on the PID algorithm, such as... Figure 4 As shown, a negative feedback mechanism based on the PID algorithm is established to regulate the motor-driven water pump.

[0091] Traditional flushing methods rely on manual operation, flushing layer by layer at fixed times and locations based on experience. This embodiment effectively solves the problems of energy consumption, time consumption, and manpower consumption of traditional methods by introducing a differential pressure detection device and an automatic control algorithm. The FGD demister flushing method based on FGD differential pressure detection adopts automatic fixed-point flushing and is equipped with relevant fault protection. It can compare the data collected by each detection instrument with the set value and make judgments. If it exceeds the calibrated range, it will issue a warning signal to ensure the stable operation of the demister.

[0092] Given that wet desulfurization absorption towers typically employ multiple layers of demisters, this invention, in addition to measuring the total differential pressure (the total pressure drop of the desulfurized flue gas as it passes through all layers of demisters), also incorporates differential pressure detection for each demister layer. This avoids the traditional practice where operators manually flush each demister layer sequentially to reduce the total differential pressure after it increases. Instead, based on the detected differential pressure values ​​of each demister layer, priority flushing can be given to demisters with high blockage differential pressure, achieving targeted flushing, ensuring flushing efficiency, and reducing flushing energy consumption. It also avoids the problem of large amounts of flushing water entering the absorption tower and disrupting the water balance, a problem inherent in traditional flushing methods.

[0093] This invention utilizes a variable frequency drive to power the demister flushing water pump, a flushing main pipe water pressure detection transmitter, and a flow meter. A flushing model is established through a desulfurization DCS to achieve different flushing pressures for each demister layer under varying blockage conditions (differential pressure values). For the first demister layer's windward side, which is the first to come into contact with flue gas, the flushing pressure is increased by raising the pump's operating frequency. Following the flue gas flow direction, the flushing pressure is sequentially reduced for each demister layer, and the optimal flushing pressure is determined based on the flushing effect. This approach avoids damage to the demister caused by excessively high flushing water pressure and also solves the problems of poor flushing effect, excessive flushing time, and excessive water volume caused by excessively low flushing water pressure.

[0094] The flushing method based on differential pressure detection of each demister layer implemented in this invention can also realize automatic optimization function during flushing through real-time detection of differential pressure. For demisters with excessively fast or large differential pressure blockage, the flushing frequency and flushing pressure can be increased; for demister layers under differential pressure, the flushing frequency and flushing pressure can be reduced.

[0095] The above is a schematic scheme of an FGD demister flushing method based on differential pressure detection according to this embodiment. It should be noted that the technical solution of this FGD demister flushing system based on differential pressure detection belongs to the same concept as the technical solution of the aforementioned FGD demister flushing method based on differential pressure detection. Details not described in detail in the technical solution of the FGD demister flushing system based on differential pressure detection in this embodiment can be found in the description of the technical solution of the aforementioned FGD demister flushing method based on differential pressure detection.

[0096] The FGD demister flushing system based on differential pressure detection in this embodiment includes:

[0097] The judgment module is used to acquire equipment status data and determine whether the demister flushing conditions are met. If the flushing conditions are not met, a status warning is issued.

[0098] The detection module is used to scan the differential pressure values ​​of each layer of demisters if the flushing conditions are met, and to establish abnormal layers and detection queues.

[0099] The first flushing module is used to detect the detection queue in sequence. If there are abnormal values, an abnormal queue is established and the demisters in each layer of the abnormal queue are flushed.

[0100] The second flushing module is used to flush the abnormal layer if there are no abnormal values ​​in the detection queue. After flushing, the differential pressure detection of each layer is repeated to perform the next round of flushing.

[0101] This embodiment also provides an electronic device suitable for FGD demister flushing based on differential pressure detection, including:

[0102] The system includes a memory and a processor. The memory stores computer-executable instructions, and the processor executes these instructions to implement the FGD demister flushing method based on differential pressure detection as proposed in the above embodiments.

[0103] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the FGD demister flushing method based on differential pressure detection as proposed in the above embodiments.

[0104] The storage medium proposed in this embodiment and the FGD demister flushing method based on differential pressure detection proposed in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0105] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of the present invention.

[0106] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A flushing method for an FGD demister based on differential pressure detection, characterized in that, include: Acquire equipment status data to determine whether the demister flushing conditions are met. If the flushing conditions are not met, issue a status warning. If the flushing conditions are met, the differential pressure values ​​of each layer of demisters are scanned and detected to establish abnormal layers and detection queues. The detection queue is tested sequentially. If an abnormal value is found, an abnormal queue is established, and each layer of demister in the abnormal queue is flushed. If there are no outliers in the detection queue, the outlier layer is flushed. After flushing, the differential pressure detection of each layer is repeated for the next round of flushing. Obtaining equipment status data and determining whether the demister flushing conditions are met includes: Acquire the liquid level value of the absorption tower and the status and operation data of the demister water flushing equipment; Flushing condition one: Determine whether the liquid level in the absorption tower is lower than the preset liquid level. If it is lower than the preset liquid level, then flushing condition one is met. Flushing condition two: Check the status and operation data of the demister water washing equipment. If the demister is in a fault-free state, all valves are in the initial closed state, and the data status of all detection instruments is within the normal range, then flushing condition two is met. If both flushing condition one and flushing condition two are met simultaneously, then the demister flushing condition is met. The establishment of the anomaly layer and detection queue includes: Simultaneously, the differential pressure values ​​of each layer of demisters are detected, and an abnormal layer x and a detection queue Q1 are established; When the differential pressure value of layer x is abnormal, an abnormal layer x is established. The abnormal differential pressure value of layer x includes: Abnormal condition one: The actual differential pressure value is less than the differential pressure set value or the actual differential pressure value is greater than the differential pressure set value; Abnormal condition two: Abnormal condition one is met and the detection duration is greater than or equal to the preset abnormal time. Establishing the detection queue Q1 includes: Establish a queue from the layer before the anomaly layer x to the first layer to generate the detection queue Q1; The establishment of the exception queue includes: The detection queue Q1 is detected in descending order. If there are outliers in the detection queue Q1, an outlier queue Q2 is created. The outlier level is added to the outlier queue Q2, and the outlier queue Q2 is 1, 2, ..., m. Among them, the first abnormal layer in the abnormal queue Q2 corresponds to the abnormal layer with the smallest layer value, and the m-th abnormal layer corresponds to the abnormal layer with the largest layer number. The abnormal queue Q2 is flushed according to the order of the queue from front to back.

2. The FGD demister flushing method based on differential pressure detection as described in claim 1, characterized in that, If the flushing conditions are not met, a status warning will be issued, including: If flushing condition one is not met, the system will enter protection stop mode and stop flushing. If flushing condition two is not met, then check if the demister is faulty. If a fault exists, the demister enters a fault alarm state and demister flushing is prohibited. If no fault exists, then re-evaluate whether the demister flushing condition is met.

3. The FGD demister flushing method based on differential pressure detection as described in claim 2, characterized in that, The flushing of the abnormal layer includes: Get the demister status of the current layer; Establish a flushing queue Q3 for demisters, and add demisters in normal condition to the flushing queue Q3 according to their position order; Check the flushing queue Q3. If the flushing queue Q3 is completely empty, trigger the fault alarm for the current layer and end the flushing process for the current layer. If the flushing queue Q3 is not empty, and the number of demisters in the flushing queue Q3 is equal to the number of demisters in the current layer, then the demisters in the current layer are flushed one by one according to the queue order in the flushing queue Q3. If the number of demisters in the flushing queue Q3 is not equal to the number of demisters in that layer, an alarm is triggered for the demisters not in the flushing queue Q3, and then the demisters in the flushing queue Q3 are flushed according to the queue order.

4. A FGD demister flushing system based on differential pressure detection, characterized in that, The method of claim 1 is used, comprising: The judgment module is used to acquire equipment status data and determine whether the demister flushing conditions are met. If the flushing conditions are not met, a status warning is issued. The detection module is used to scan the differential pressure values ​​of each layer of demisters if the flushing conditions are met, and to establish abnormal layers and detection queues. The first flushing module is used to sequentially detect the detection queue. If there are abnormal values, an abnormal queue is established, and each layer of demister in the abnormal queue is flushed. The second flushing module is used to flush the abnormal layer if there are no abnormal values ​​in the detection queue. After flushing, the differential pressure detection of each layer is repeated to perform the next round of flushing.

5. An electronic device, characterized in that, include: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, they implement the steps of the FGD demister flushing method based on differential pressure detection as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, It stores computer-executable instructions that, when executed by a processor, implement the steps of the FGD demister flushing method based on differential pressure detection as described in any one of claims 1 to 3.

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