Dynamic energy-saving cooperative control system and method for electric precipitation and desulfurization

Abstract

The invention relates to the technical field of flue gas desulfurization, in particular to a dynamic energy-saving cooperative control system and method for electric precipitation and desulfurization. The dynamic energy-saving cooperative control system for electric precipitation and desulfurization comprises a monitoring layer which comprises a plurality of turbidity monitors arranged at outlets of all channels of an electric precipitator and a dust concentration monitor arranged at a clean flue gas outlet of a wet desulfurization system; the control layer comprises a central control unit in communication connection with the monitoring layer, and an inner ring sub-channel adjusting unit and an outer ring desulfurization linkage unit are arranged in the central control unit; and the execution layer comprises a plurality of electric precipitation channel power supply controllers controlled by the inner ring sub-channel adjusting unit and a desulfurization system execution mechanism controlled by the outer ring desulfurization linkage unit. By constructing a double-closed-loop cooperative control mechanism of the electric precipitation and desulfurization system, the problems that traditional systems are mutually independent and response lags are solved, and the reliability and the control accuracy of the system are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of flue gas desulfurization technology, and in particular to a dynamic energy-saving synergistic control system and method for electrostatic precipitator and desulfurization. Background Technology

[0002] With increasingly stringent environmental protection requirements, coal-fired power units face higher emission standards and control efficiency challenges in flue gas treatment. Currently, large coal-fired power units generally adopt a flue gas purification process of "electrostatic precipitator + wet desulfurization". In this process, the electrostatic precipitator system is responsible for removing most of the dust in the flue gas, while the wet desulfurization system further removes sulfur dioxide and synergistically controls dust emissions.

[0003] However, existing electrostatic precipitators (ESPs) and desulfurization systems typically employ independent control strategies, lacking effective coordination mechanisms. This leads to the following main problems: Traditional ESPs use overall outlet turbidity as the basis for adjustment, failing to achieve independent monitoring at the channel level. When the turbidity in a particular channel exceeds the standard (e.g., exceeding 25 mg / m³), the overall average may still show compliance due to lower turbidity in other channels, resulting in missed detection of high-dust channels and ultimately causing excessive dust concentration at the desulfurization outlet. Furthermore, there is a lack of data linkage between the ESP and desulfurization systems. When the dust concentration at the ESP outlet suddenly increases, the desulfurization system cannot respond promptly, requiring manual intervention, with response delays exceeding 30 minutes. During this period, problems such as slurry poisoning and demister blockage can easily occur, affecting the stable operation of the system. Under low-load conditions, the ESP system still operates at full-load parameters, failing to dynamically adjust energy output according to the actual dust concentration, resulting in low energy utilization and energy waste exceeding 60% in some conditions.

[0004] Therefore, there is an urgent need for an optimized control system and method that can achieve precise monitoring at the electrostatic precipitator channel level, dynamic linkage with the desulfurization system, and load adaptive energy regulation capability, so as to improve the overall system's control accuracy, energy efficiency and operational reliability. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problems of insufficient control precision, poor system coordination, and serious energy waste in the prior art.

[0006] To address the aforementioned technical problems, this invention provides a dynamic energy-saving synergistic control system for electrostatic precipitator and desulfurization, comprising: The monitoring layer includes multiple turbidity monitors installed at the outlets of each channel of the electrostatic precipitator and a dust concentration monitor installed at the clean flue gas outlet of the wet desulfurization system; the turbidity monitors are used to collect turbidity data of each channel in real time, and the dust concentration monitors are used to collect dust concentration data after desulfurization. The control layer includes a central control unit that is communicatively connected to the monitoring layer. The central control unit has an inner loop channel regulation unit and an outer loop desulfurization linkage unit built in. The inner loop channel regulation unit independently controls each channel of the electrostatic precipitator based on the turbidity data of each channel. The outer loop desulfurization linkage unit controls the wet desulfurization system based on the data from the dust concentration monitor and is linked with the inner loop channel regulation unit. The execution layer, connected to the control layer, includes multiple electrostatic precipitator channel power controllers controlled by the inner ring channel regulating unit and desulfurization system actuators controlled by the outer ring desulfurization linkage unit.

[0007] Preferably, the inner ring channel adjustment unit independently controls each channel of the electrostatic precipitator based on the turbidity data of each channel, including: The turbidity value of the channel collected in real time is compared with the preset threshold, and the channel is divided into excessive working conditions, critical working conditions or low dust working conditions according to the comparison results. For channels operating beyond the standard conditions, increase the pulse amplitude and frequency of the high-frequency power supply corresponding to the electric field of that channel; For channels operating under low dust conditions, reduce the energy consumption of the high-frequency power supply corresponding to the electric field of that channel.

[0008] Preferably, for channels operating under excessive conditions, increasing the pulse amplitude and frequency of the high-frequency power supply corresponding to the electric field of that channel further includes: If the turbidity of the channel still fails to meet the standard after the energy output of the channel is increased, the adjacent channels will be triggered to perform energy coordination compensation, and an early warning signal will be sent to the outer ring desulfurization linkage unit at the same time.

[0009] Preferably, the inner loop channel regulating unit adopts a fuzzy PID control algorithm to dynamically adjust the control weights according to the unit load rate.

[0010] Preferably, the outer ring desulfurization linkage unit controls the wet desulfurization system based on the data from the dust concentration monitor, and is linked with the inner ring channel regulating unit, including: When the dust concentration collected by the dust concentration monitor exceeds the first preset value, the inner ring channel adjustment unit is instructed to increase the energy output of all channels of the electrostatic precipitator. When the dust concentration exceeds a second preset value that is higher than the first preset value, the desulfurization system actuator is instructed to increase the limestone slurry supply.

[0011] Preferably, when the outer ring desulfurization linkage unit receives a warning signal from the inner ring sub-channel adjustment unit indicating excessive turbidity in a channel, or when the turbidity of a single channel exceeds a preset risk threshold, it automatically triggers the demister flushing device in the desulfurization system actuator to perform flushing.

[0012] This invention also provides a dynamic energy-saving synergistic control method for electrostatic precipitator and desulfurization, comprising: Real-time monitoring of the outlet turbidity of each channel of the electrostatic precipitator and the dust concentration of the clean flue gas after wet desulfurization; Based on the outlet turbidity of each channel, the inner ring sub-channel adjustment unit is dynamically adjusted independently for each channel. Based on the dust concentration in the clean flue gas, desulfurization linkage adjustment is performed on the outer ring desulfurization linkage unit.

[0013] Preferably, the independent channel-specific dynamic adjustment of the inner ring channel-specific adjustment unit based on the outlet turbidity of each channel includes: The channel with turbidity exceeding the threshold is identified, and the amplitude and frequency of the high-frequency pulses in the preceding electric field of that channel are increased. After the energy is increased, the turbidity is retested after the first preset time. If it still does not meet the standard, the adjacent channel is triggered to perform energy collaborative compensation. Obtain channels with turbidity below the energy-saving threshold, and reduce energy consumption by extending the low-frequency pulse interval or shortening the high-frequency cycle; After a second preset time following the reduction in energy consumption, the turbidity is retested. If the rebound exceeds the preset tolerance, the previous operating parameters are restored.

[0014] Preferably, the step of adjusting the desulfurization linkage of the outer ring desulfurization linkage unit according to the net flue gas dust concentration includes: When the dust concentration in the clean flue gas exceeds the first linkage threshold, the energy of the entire channel of the electrostatic precipitator is activated. When the dust concentration in the clean flue gas exceeds the second linkage threshold, the limestone slurry supply to the wet desulfurization system is increased simultaneously. When the turbidity of a single channel of the electrostatic precipitator exceeds the risk threshold, the demister flushing program is automatically triggered and a maintenance work order is generated.

[0015] Preferably, the inner ring sub-channel adjustment unit and the outer ring desulfurization linkage unit perform data interaction and coordinated control.

[0016] The technical solution of the present invention has the following advantages compared with the prior art: This invention discloses a dynamic energy-saving synergistic control system and method for electrostatic precipitator (ESP) and desulfurization. By constructing a dual closed-loop synergistic control mechanism for the ESP and desulfurization systems, it solves the problems of independent operation and delayed response in traditional systems. Based on the dust concentration in the final clean flue gas, it rapidly and automatically reverse-adjusts the upstream ESP and desulfurization systems, significantly reducing the fluctuation range of dust concentration and ensuring stable emission concentration compliance. This fundamentally eliminates the emission risks caused by local channel exceedances or system response delays. By deploying independent monitoring units in each channel and implementing a channel-specific dynamic adjustment strategy, it achieves refined control over the uneven dust distribution within the ESP. It can quickly identify and locate local high-turbidity channels and take targeted energy boosting or adjacent channel synergistic compensation measures, avoiding the missed detection of local exceedances under the traditional "overall average control" mode, and greatly improving the reliability and control accuracy of the system. Attached Figure Description

[0017] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a structural diagram of a dynamic energy-saving synergistic control system for electrostatic precipitator and desulfurization provided by the present invention; Figure 2 This is a flowchart of a dynamic energy-saving synergistic control method for electrostatic precipitator and desulfurization provided by the present invention; Figure 3 This is a schematic diagram of the turbidity control method provided by the present invention. Detailed Implementation

[0018] The core of this invention is to provide a dynamic energy-saving synergistic control system for electrostatic precipitator and desulfurization. By constructing a dual closed-loop synergistic control mechanism for the electrostatic precipitator and desulfurization system, the reliability and control accuracy of the system are improved.

[0019] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please refer to Figure 1. Figure 1 The logical relationship diagram of a dynamic energy-saving synergistic control system for electrostatic precipitator and desulfurization provided by the present invention is shown below; the specific operation steps are as follows: The monitoring layer includes multiple turbidity monitors installed at the outlets of each channel of the electrostatic precipitator and a dust concentration monitor installed at the clean flue gas outlet of the wet desulfurization system; the turbidity monitors are used to collect turbidity data of each channel in real time, and the dust concentration monitors are used to collect dust concentration data after desulfurization. Specifically, in the monitoring section: multiple turbidity monitors in the electrostatic precipitator channels collect turbidity data at the outlet of each channel in real time and transmit the data to the data acquisition module. The dust concentration monitor in the clean flue gas after wet desulfurization is responsible for monitoring the dust concentration after desulfurization and transmitting the data directly to the central control unit. These monitoring devices are crucial for the system to obtain real-time data, providing a basis for subsequent control decisions.

[0021] The control layer includes a central control unit that is communicatively connected to the monitoring layer. The central control unit has an inner loop channel regulation unit and an outer loop desulfurization linkage unit built in. The inner loop channel regulation unit independently controls each channel of the electrostatic precipitator based on the turbidity data of each channel. The outer loop desulfurization linkage unit controls the wet desulfurization system based on the data from the dust concentration monitor and is linked with the inner loop channel regulation unit. Specifically, in the control section: After receiving monitoring data, the central control unit transmits it to the inner loop sub-channel regulating unit and the outer loop desulfurization linkage unit. The inner loop sub-channel regulating unit precisely controls the operating parameters of the power controller for each channel based on the turbidity data of each channel of the electrostatic precipitator, such as adjusting the voltage and current of the electric field, to achieve refined control of the electrostatic precipitator process. The outer loop desulfurization linkage unit issues commands to the desulfurization system controller based on the dust concentration data after desulfurization.

[0022] The inner loop sub-channel adjustment unit is configured to execute the following control logic: The real-time turbidity values ​​of the channels are compared with preset thresholds, and the channels are divided into excessive operating conditions, critical operating conditions, or low dust operating conditions based on the comparison results. For channels in excessive operating conditions, the pulse amplitude and frequency of the high-frequency power supply of the corresponding electric field of the channel are increased. For channels in low dust operating conditions, the energy consumption of the high-frequency power supply of the corresponding electric field of the channel is reduced.

[0023] If the turbidity of the channel still fails to meet the standard after the energy output of the channel is increased, the adjacent channels will be triggered to perform energy coordination compensation, and an early warning signal will be sent to the outer ring desulfurization linkage unit at the same time.

[0024] The inner loop channel control unit adopts a fuzzy PID control algorithm to dynamically adjust the control weights according to the unit load rate.

[0025] The outer ring desulfurization linkage unit is configured to execute the following control logic: When the dust concentration collected by the dust concentration monitor exceeds the first preset value, the inner ring channel regulating unit is instructed to increase the energy output of all channels of the electrostatic precipitator; when the dust concentration exceeds the second preset value which is higher than the first preset value, the desulfurization system actuator is instructed to increase the limestone slurry supply.

[0026] When the outer ring desulfurization linkage unit receives a warning signal from the inner ring sub-channel adjustment unit indicating excessive turbidity in a channel, or when the turbidity of a single channel exceeds a preset risk threshold, it automatically triggers the demister flushing device in the desulfurization system actuator to perform flushing.

[0027] The execution layer, connected to the control layer, includes multiple electrostatic precipitator channel power controllers controlled by the inner ring channel regulating unit and desulfurization system actuators controlled by the outer ring desulfurization linkage unit.

[0028] Specifically, in the execution section: the electrostatic precipitator channel power controller precisely controls the operating state of the electric field in the electrostatic precipitator channel according to the instructions of the inner ring channel regulating unit, efficiently removing dust from the flue gas. The limestone slurry supply pump controller precisely adjusts the operation of the limestone slurry supply pump according to the instructions of the outer ring desulfurization linkage unit, controlling the supply of limestone slurry to ensure desulfurization effect. The demister flushing device controller promptly controls the operation of the demister flushing device according to the instructions of the outer ring desulfurization linkage unit, effectively preventing demister blockage and ensuring the stable operation of the desulfurization system.

[0029] It also includes a feedback loop: during the dust removal process, the operating status of the electric field in the electrostatic precipitator channel and the condition of the treated flue gas are fed back to the corresponding turbidity monitor of the electrostatic precipitator channel for real-time monitoring of the dust removal effect. After the demister flushing device operates, the condition of the desulfurized flue gas is fed back to the dust concentration monitor of the clean flue gas after wet desulfurization, thus forming a complete closed-loop control system to achieve dynamic monitoring and precise adjustment of the entire electrostatic precipitator and desulfurization process.

[0030] This embodiment provides a dynamic energy-saving coordinated control system and method for electrostatic precipitator (ESP) and desulfurization. By constructing a dual closed-loop coordinated control mechanism for the ESP and desulfurization systems, it solves the problems of independent operation and delayed response in traditional systems. Based on the dust concentration in the final clean flue gas, it quickly and automatically adjusts the upstream ESP and desulfurization systems in reverse, significantly reducing the fluctuation range of dust concentration and ensuring stable compliance of emission concentrations. This fundamentally eliminates the emission risks caused by local channel exceedances or system response delays. By deploying independent monitoring units in each channel and implementing a channel-specific dynamic adjustment strategy, it achieves refined control over the uneven dust distribution within the ESP. It can quickly identify and locate local high-turbidity channels and take targeted energy boosting or adjacent channel coordinated compensation measures, avoiding the missed detection of local exceedances under the traditional "overall average control" mode, and greatly improving the reliability and control accuracy of the system.

[0031] like Figure 2 As shown, Figure 2 The present invention provides a dynamic energy-saving synergistic control method for electrostatic precipitator and desulfurization, as detailed below: Step S201: Monitor the outlet turbidity of each channel of the electrostatic precipitator and the dust concentration of the clean flue gas after wet desulfurization in real time. Specifically, channels with turbidity exceeding the threshold are identified, and the amplitude and frequency of the high-frequency pulses in the preceding electric field of those channels are increased. After the energy increase, the turbidity is remeasured after a first preset time. If it still does not meet the standard, adjacent channels are triggered to perform energy collaborative compensation. Channels with turbidity below the energy-saving threshold are identified, and energy consumption is reduced by extending the low-frequency pulse interval or shortening the high-frequency cycle. After the energy consumption is reduced, the turbidity is remeasured after a second preset time. If the rebound exceeds the preset tolerance, the previous operating parameters are restored.

[0032] In one embodiment, a 1000MW coal-fired power unit's electrostatic precipitator has eight channels. At a certain operating moment, the central control unit collects the following data using high-temperature laser turbidity meters at the outlets of each channel: the turbidity of channels 1 to 7 is between 10-14 mg / m³, while the turbidity of channel 8 is 23 mg / m³. The system's set exceedance threshold is 20 mg / m³, and the energy-saving threshold is 15 mg / m³.

[0033] The inner ring channel adjustment unit processes the data in real time and identifies that the turbidity (23 mg / m³) of channel 8 has exceeded the threshold and is judged as "exceeding the standard condition"; the turbidity of channels 1 to 7 is all below the energy-saving threshold and is judged as "low dust condition".

[0034] Handling of Excessive Operating Conditions: The inner loop sub-channel adjustment unit immediately sends a command to the independent high-frequency power supply of control channel 8 to increase the amplitude and frequency of the high-frequency pulses in its preceding electric field. Specifically, the pulse amplitude is increased from 70% to 85%, and the frequency is increased from 200Hz to 250Hz. After increasing the energy, the system waits for a first preset time (e.g., 8 seconds) and then remeasures the turbidity of channel 8.

[0035] The retest results showed that the turbidity in channel 8 dropped to 18 mg / m³, which is below the threshold for exceeding the limit, indicating successful treatment. The system then maintained this parameter during operation.

[0036] Low-dust operation (parallel): Simultaneously, for channels 1 to 7 operating in "low-dust condition," the inner loop channel control unit instructs its high-frequency power supply to reduce energy consumption by extending the low-frequency pulse interval. For example, the pulse interval is extended from 200ms to 300ms.

[0037] After reducing energy consumption, the system waits for a second preset time (e.g., 30 seconds) and then retests all low-dust channels.

[0038] The retest results showed that the turbidity of all channels remained stable below 16 mg / m³, and the rebound value did not exceed the preset tolerance (e.g., 0.5 mg / m³). The system was confirmed to be safe and was locked into this low-energy-consumption operation mode.

[0039] Step S202: Based on the outlet turbidity of each channel, perform independent channel-specific dynamic adjustment of the inner ring channel adjustment unit; Specifically, when the dust concentration in the clean flue gas exceeds the first linkage threshold, the energy of the entire channel of the electrostatic precipitator is increased; when the dust concentration in the clean flue gas exceeds the second linkage threshold, the limestone slurry supply of the wet desulfurization system is increased simultaneously; when the turbidity of a single channel of the electrostatic precipitator exceeds the risk threshold, the demister flushing program is automatically triggered and a maintenance work order is generated.

[0040] In one embodiment, the electrostatic precipitator system operates stably after internal adjustments. After a period of time, due to fluctuations in coal quality, the dust concentration monitor at the outlet of the wet desulfurization system detects a continuous increase in the concentration of dust in the flue gas.

[0041] Triggering Level 1 Interlock: When the dust concentration in the clean flue gas rises to the first interlock threshold (e.g., 4.0 mg / m³), the outer ring desulfurization interlock unit immediately sends a command to the inner ring sub-channel regulating unit.

[0042] After receiving the instruction, the inner ring channel adjustment unit increases the energy output of all eight channels of the electrostatic precipitator (for example, the pulse amplitude of the high-frequency power supply in each channel is increased by 5%) to enhance the dust removal effect from the source.

[0043] Triggering Level 2 Interlock: Due to excessively high dust concentration at the source, the aforementioned measures failed to completely suppress the increase in end-point concentration. When the net flue gas dust concentration further rises to the second interlock threshold (e.g., 4.5 mg / m³), the outer ring desulfurization interlock unit simultaneously performs two operations: The electrostatic precipitator system is instructed to maintain or continue to increase its energy output and simultaneously increase the limestone slurry supply to the wet desulfurization system (e.g., increase the supply pump frequency by 5 Hz) to enhance the synergistic dust removal capability of the desulfurization system in order to jointly cope with the current dust load.

[0044] Risk warning and handling: Meanwhile, assume that due to an internal malfunction, the turbidity of channel 5 of the electrostatic precipitator suddenly increases and exceeds the risk threshold (e.g., 25 mg / m³).

[0045] The system not only handles the issue in the inner ring, but also automatically triggers the demister flushing procedure in the outer ring desulfurization linkage unit (for example, continuous flushing for 120 seconds) and generates a maintenance work order for "channel 5 abnormality" to notify maintenance personnel.

[0046] Step S203: Based on the clean flue gas dust concentration, perform desulfurization linkage adjustment on the outer ring desulfurization linkage unit.

[0047] The inner ring sub-channel adjustment unit and the outer ring desulfurization linkage unit interact and coordinate control with each other.

[0048] This embodiment provides a dynamic energy-saving synergistic control method for electrostatic precipitator and desulfurization, while simultaneously making differentiated and refined adjustments to the excessive dust channels and low dust channels. On the one hand, it quickly suppresses the risk of local excessive emissions, avoiding its impact on overall emissions; on the other hand, it significantly reduces the energy consumption of most channels under the premise of safety, achieving a unity of precise control and energy saving. By setting different levels of linkage thresholds, it achieves step-by-step and precise response, avoiding the problems of over-adjustment or insufficient response of a single system. At the same time, it intelligently links the internal anomalies of the electrostatic precipitator with the protective operation of the desulfurization system, effectively preventing the occurrence of secondary faults and improving the robustness and intelligence level of the entire flue gas treatment system.

[0049] Based on the above embodiments, this embodiment provides a detailed description of a dynamic energy-saving synergistic control system and method for electrostatic precipitator and desulfurization, as follows: Monitoring layer: Six high-temperature laser turbidity meters (temperature resistance 200℃, accuracy ±1mg / m³) are deployed at the outlet of each channel of the electrostatic precipitator to monitor the turbidity of the channel in real time. One laser forward scattering dust meter (range 0-20mg / m³, accuracy ±0.1mg / m³) is installed at the flue gas discharge outlet of the wet desulfurization process.

[0050] Control layer: The DCS system integrates a dual closed-loop control module, including an inner loop sub-channel regulation unit and an outer loop desulfurization linkage unit; a fuzzy PID algorithm module, which dynamically adjusts the control weight (0.3-0.8) according to the load rate.

[0051] Execution layer: Each channel of the electrostatic precipitator has an independent high-frequency power supply, supporting pulse amplitude (0-100%) and frequency (50-500Hz) adjustment; actuators such as the slurry circulation pump and demister flushing valve of the desulfurization system.

[0052] Control methods such as Figure 3 As shown, it includes: Data acquisition stage: Turbidity data is collected in real time by high-temperature laser turbidity meters deployed in each channel of the electrostatic precipitator, serving as the basic input for the entire control method.

[0053] Operating condition judgment logic: First, determine if the turbidity is greater than 20 mg / m³. If so, proceed with the excessive dust condition handling procedure. If the turbidity is between 15-20 mg / m³, proceed with the critical dust condition handling procedure. If the turbidity is less than or equal to 15 mg / m³, proceed with the low dust condition handling procedure. Handling of Exceeding Standards: Increase the amplitude and frequency of the high-frequency pulses in the upstream electric field of the exceeding channel. Remeasure the turbidity after 8 seconds. If it still does not meet the standard, trigger collaborative compensation from adjacent channels. Continue monitoring until the turbidity drops below 20 mg / m³, maintaining the current parameters and continuing monitoring.

[0054] Critical operating condition handling: Maintain current parameters, but analyze the turbidity trend every 5 minutes. If the turbidity increase rate is ≥0.5 mg / m³ / min, pre-increase the energy by 5% to prevent exceeding the limit. If the trend is stable, maintain the current parameters and continue monitoring.

[0055] Low-dust operation mode handling: Implement phased energy reduction measures, extending the low-frequency pulse interval or shortening the high-frequency cycle. Remeasure turbidity after 30 seconds; if the rebound is ≥0.5mg / m³, restore the previous parameters. If the turbidity stabilizes below 2.5mg / m³, lock in the low-energy consumption state and initiate trend prediction.

[0056] Closed-loop feedback mechanism: Regardless of the operating condition, the data will eventually return to the data acquisition stage for continued monitoring. This forms a complete closed-loop control, ensuring that turbidity remains under control at all times. The control strategy is dynamically adjusted based on real-time monitoring results to achieve precise turbidity control.

[0057] Specifically, Inner ring channel dynamic adjustment steps: Data acquisition: Real-time acquisition of turbidity data from 6 channels, identifying channels exceeding the standard (turbidity > 20 mg / m³), critical channels (15-20 mg / m³), and low dust channels (≤ 15 mg / m³).

[0058] Handling of operating conditions exceeding standards: When the turbidity of channel X is >20mg / m³, increase the amplitude of the pre-stage electric field pulse of this channel by 12%-20% and the frequency by 8%-50%, and retest after 8 seconds; If the target is not met, the adjacent channel X±1 energy collaborative compensation (amplitude + 10%) is triggered, and an early warning signal is sent to the desulfurization system (as shown in Figure 1).

[0059] Energy saving in low-dust operating conditions: When the turbidity of all channels is ≤15mg / m³, extend the low-frequency pulse interval by 40%-50% or shorten the high-frequency period by 25%-30%, and retest after 30 seconds; If the turbidity rebounds by ≥0.5mg / m³, restore the previous parameters; if it stabilizes at ≤2.5mg / m³, lock in the low-energy consumption state.

[0060] External ring desulfurization linkage regulation steps: Dust concentration graded response: When the concentration of desulfurized dust is >4mg / m³, the energy of the entire electrostatic precipitator channel is increased by 5%; when the concentration is >4.5mg / m³, the limestone slurry supply is increased by 10% simultaneously (as shown in Appendix 1).

[0061] High Turbidity Risk Warning: When the turbidity of a single channel of the electrostatic precipitator is >25mg / m³, the demister will be automatically flushed (lasting 120 seconds, with a 30-minute interval), and an abnormal channel will be marked to generate a maintenance work order.

[0062] In one embodiment, full-load operating condition control (1030MW): Operating conditions: Dust concentration at the electrostatic precipitator inlet is 8000 mg / m³, and turbidity in channel 3 is 22 mg / m³ (exceeding the standard).

[0063] Inner ring movement: The amplitude of the pre-stage electric field pulse in channel 3 was increased by 12% and the frequency by 8%. After 8 seconds, the turbidity dropped to 19mg / m³, meeting the standard. The total power consumption of the entire channel was reduced from 560kW to 504kW, saving 10% energy.

[0064] Outer ring condition: Desulfurization dust concentration 4.3 mg / m³ (≤5 mg / m³), no intervention required.

[0065] In one embodiment, low-load condition control (500MW): Operating conditions: Dust concentration at the electrostatic precipitator inlet is 40 mg / m³, and turbidity in all channels is ≤15 mg / m³.

[0066] Inner ring movement: The low-frequency pulse interval was extended by 40% (from 200ms to 280ms), reducing power consumption from 200kW to 120kW, resulting in 40% energy savings; the turbidity was retested every 3 minutes and remained stable at 10mg / m³, maintaining a low-energy consumption state.

[0067] Outer ring action: Dust concentration 4.1mg / m³, triggering electrostatic precipitator energy fine adjustment (amplitude + 2%) to ensure emission safety.

[0068] This embodiment provides a dynamic energy-saving synergistic control system and method for electrostatic precipitator and desulfurization. Data shows a significant improvement in energy efficiency: 40% energy saving under low load conditions (200kW → 120kW), 10% energy saving under full load, resulting in annual electricity savings of 748,000 kWh and electricity costs of 411,000 yuan. Compared to traditional control methods, it reduces ineffective energy input by 30%-50%, solving the waste problem of "local exceedances requiring overall energy increase." Emission control achieves precise compliance: the dust concentration in the desulfurized flue gas decreased from 6.2 mg / m³ to 4.3 mg / m³, achieving 100% compliance, and reducing concentration fluctuation by 67%. Channel-level monitoring shortens the identification time for local high-turbidity channels from 30 minutes to 10 seconds, increasing response speed by 180 times. Desulfurization risks are effectively controlled: the frequency of slurry poisoning decreased from 3 times per month to 0, the demister pressure difference decreased from 800 Pa to 500 Pa, and annual maintenance costs decreased by 200,000 yuan. The automatic flushing mechanism reduces the frequency of manual demister flushing by 100% and increases equipment availability by 5%. The system's intelligence level is enhanced: the fuzzy PID algorithm enables adaptive load adjustment, prioritizing dust removal efficiency (weight 0.8) under high loads and energy saving (weight 0.3) under low loads. The fault warning mechanism improves the equipment anomaly detection rate by 40%, allowing for early intervention and preventing downtime losses.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dynamic energy-saving collaborative control system for electric dust removal and desulfurization, characterized in that, The method comprises the following steps: A monitoring layer comprising a plurality of turbidity monitors arranged at the outlets of each passage of the electric dust collector and a dust concentration monitor arranged at the outlet of the flue gas of the wet desulfurization system; The turbidity monitors are used to collect the turbidity data of each passage in real time, and the dust concentration monitor is used to collect the dust concentration data after desulfurization; A control layer comprising a central control unit in communication connection with the monitoring layer, wherein the central control unit is internally provided with an inner ring passage-by-passage adjustment unit and an outer ring desulfurization linkage unit; the inner ring passage-by-passage adjustment unit independently controls each passage of the electric dust collector according to the turbidity data of each passage; the outer ring desulfurization linkage unit controls the wet desulfurization system according to the data of the dust concentration monitor and links with the inner ring passage-by-passage adjustment unit; An execution layer connected with the control layer, comprising a plurality of electric dust passage power controllers controlled by the inner ring passage-by-passage adjustment unit and a desulfurization system execution mechanism controlled by the outer ring desulfurization linkage unit.

2. The dynamic energy-saving cooperative control system for electric dust removal and desulfurization according to claim 1, characterized in that, The inner ring passage-by-passage adjustment unit independently controls each passage of the electric dust collector according to the turbidity data of each passage, which comprises the following steps: Comparing the real-time collected passage turbidity value with a preset threshold value, and dividing the passage into an over-standard working condition, a critical working condition or a low dust working condition according to the comparison result; For the passage in the over-standard working condition, the pulse amplitude and frequency of the high-frequency power supply of the corresponding electric field of the passage are increased; For the passage in the low dust working condition, the energy consumption of the high-frequency power supply of the corresponding electric field of the passage is reduced.

3. The dynamic energy-saving cooperative control system for electric dust removal and desulfurization according to claim 2, characterized in that, For the passage in the over-standard working condition, the pulse amplitude and frequency of the high-frequency power supply of the corresponding electric field of the passage are increased, which further comprises the following steps: After increasing the energy output of the passage, if the passage turbidity still does not meet the standard, triggering the energy collaborative compensation of the adjacent passage, and sending a warning signal to the outer ring desulfurization linkage unit at the same time.

4. The dynamic energy-saving cooperative control system for electric dust removal and desulfurization according to claim 1, characterized in that, The inner ring passage-by-passage adjustment unit adopts a fuzzy PID control algorithm to dynamically adjust the control weight according to the unit load rate.

5. The dynamic energy-saving cooperative control system for electric dust removal and desulfurization according to claim 1, characterized in that, The outer ring desulfurization linkage unit controls the wet desulfurization system according to the data of the dust concentration monitor and links with the inner ring passage-by-passage adjustment unit, which comprises the following steps: When the dust concentration collected by the dust concentration monitor exceeds a first preset value, the inner ring passage-by-passage adjustment unit is instructed to increase the energy output of all passages of the electric dust collector; When the dust concentration exceeds a second preset value higher than the first preset value, the desulfurization system execution mechanism is instructed to increase the limestone slurry supply amount.

6. The dynamic energy-saving synergic control system for electric dust removal and desulfurization according to claim 1, characterized in that, When the outer ring desulfurization linkage unit receives the early warning signal of the passage turbidity from the inner ring passage-by-passage adjustment unit or the single passage turbidity exceeds the preset risk threshold value, the demister flushing device in the desulfurization system execution mechanism is automatically triggered to flush.

7. A dynamic energy-saving collaborative control method for electric dust removal and desulfurization, characterized in that, The method comprises the following steps: Real-time monitoring of the outlet turbidity of each passage of the electric dust collector and the dust concentration of the flue gas after wet desulfurization; Independently adjusting the inner ring passage-by-passage adjustment unit according to the outlet turbidity of each passage; Adjusting the outer ring desulfurization linkage unit according to the dust concentration of the flue gas.

8. The dynamic energy-saving cooperative control method for electric dust removal and desulfurization according to claim 7, characterized in that, Independently adjusting the inner ring passage-by-passage adjustment unit according to the outlet turbidity of each passage comprises the following steps: Acquire the channel whose turbidity exceeds the threshold value, and increase the amplitude and frequency of high-frequency pulse of the electric field in front of the channel; After the first preset time after the energy is increased, retest the turbidity, if it still does not reach the standard, trigger the adjacent channel to perform energy compensation; Acquire the channel whose turbidity is lower than the energy-saving threshold value, and reduce the energy consumption by prolonging the interval of low-frequency pulse or shortening the period of high-frequency pulse; After the second preset time after the energy consumption is reduced, retest the turbidity, if it rebounds more than the preset tolerance, restore to the previous working parameters.

9. The dynamic energy-saving synergic control method for electric dust removal and desulfurization according to claim 7, characterized in that, The desulfurization linkage adjustment of the outer ring desulfurization linkage unit according to the net flue gas dust concentration comprises: When the net flue gas dust concentration exceeds the first linkage threshold value, trigger the energy increase of the full channel of the electric precipitator; When the net flue gas dust concentration exceeds the second linkage threshold value, synchronously increase the limestone slurry supply amount of the wet desulfurization system; When the turbidity of the single channel of the electric precipitator exceeds the risk threshold value, automatically trigger the demister flushing program and generate a maintenance work order.

10. The dynamic energy-saving synergic control method for electric dust removal and desulfurization according to claim 7, characterized in that, The inner ring channel adjustment unit and the outer ring desulfurization linkage unit perform data interaction and collaborative control.

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