Method and device for dust removal and desulfurization coordination control of thermal power unit

Abstract

The application discloses a dust removal and desulfurization collaborative control method and device for a thermal power unit, relates to the technical field of dust removal and desulfurization, and comprises the following steps: step one, collaborative analysis of treatment, step two, collaborative analysis of control, step three, collaborative analysis of targets, and step four, dynamic adjustment of control. First, second and third dynamic control levels are generated and automatically adjusted, an intelligent control system suitable for working condition fluctuation is constructed, manual parameter adjustment is not required frequently, manual operation cost is reduced, human error and hysteresis in manual adjustment are avoided, the stability and intelligent level of system operation are improved. In the three control levels, targeted optimization is realized, the deep integration of treatment effect standardization and energy-saving optimization is realized, energy waste caused by excessive control is avoided, resource consumption is reduced through dynamic adjustment, and finally, the comprehensive operation energy consumption of the dust removal and desulfurization system of the thermal power unit is reduced, and environmental protection and economy are taken into account.

Description

Technical Field

[0001] This invention relates to the field of dust removal and desulfurization technology, specifically to a method and device for coordinated control of dust removal and desulfurization in thermal power units. Background Technology

[0002] As the core support for energy supply, the treatment of pollutants such as dust and SO2 in the flue gas of coal-fired power units is a key link in winning the battle for blue skies. Currently, most mainstream coal-fired power units adopt a combined process of electrostatic precipitator and limestone-gypsum wet desulfurization. However, due to the limitations of the traditional segmented treatment and independent control technology, it is necessary to analyze the methods and devices for coordinated dust removal and desulfurization control in coal-fired power units.

[0003] Existing technology, such as the invention application patent with announcement number CN113050559B, discloses a method for coordinated control of a desulfurization system and an electrostatic precipitator system in a coal-fired power plant. This method calculates the sulfur content in the flue gas emitted by the coal-fired power plant based on the sulfur content of the front-end flue gas, the operating parameters of the desulfurization system, and the operating parameters of the electrostatic precipitator system. If the sulfur content of the emitted flue gas meets a preset rule, an adjustment command is triggered. In response to the adjustment command, the current unit load of the coal-fired power plant is obtained. Based on a preset rule lookup table, adjustment schemes for the desulfurization system and the electrostatic precipitator system are determined according to the unit load and the sulfur content of the front-end flue gas. The adjustment schemes are then executed to adjust the operating parameters of the desulfurization system and the electrostatic precipitator system.

[0004] Existing technologies for the coordinated control of dust removal and desulfurization in thermal power units can meet basic requirements, but they also have some potential defects and challenges, specifically in the following aspects: First, existing technologies lack a graded adjustment mechanism based on multi-index safety ranges, resulting in low efficiency and low consumption at level two, but without precise efficiency improvement; and high consumption and high control at level three, but with blind waste. Second, fluctuations in dust concentration at the dust removal system outlet directly affect the atomization effect and reactivity of the desulfurization slurry, leading to a decrease in desulfurization efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a method and device for coordinated control of dust removal and desulfurization in thermal power units, which solves the problems existing in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a method and device for coordinated control of dust removal and desulfurization of thermal power units, including step one, coordinated analysis of treatment, step two, coordinated analysis of control, step three, coordinated analysis of target and step four, dynamic adjustment of control.

[0007] Step 1: Governance Collaboration Analysis: Real-time data acquisition of basic coal-fired parameters is conducted using a laser-induced breakdown spectroscopy online monitoring device to obtain basic coal-fired data, and the process governance efficiency index of dust removal and desulfurization in thermal power units at different time periods is analyzed.

[0008] Step 2: Control Coordination Analysis: Real-time operation data of the electrostatic precipitator and desulfurization system of the thermal power unit is collected through the equipment PLC system to obtain equipment operation data. The electric field control stability value of the electrostatic precipitator equipment and the dust removal coordination value of the desulfurization system equipment are analyzed at different time periods of dust removal and desulfurization of the thermal power unit.

[0009] Step 3: Target Collaborative Analysis: Real-time energy consumption data of the electrostatic precipitator is collected using high-precision energy meters, metering pumps, and flow meters to obtain energy consumption and resource data, and the energy consumption and resource consumption index of the thermal power unit in dust removal and desulfurization at different time periods is analyzed.

[0010] Step 4: Dynamic Control Adjustment: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units for each time period, the electric field control stability value of electrostatic precipitator equipment for dust removal and desulfurization of thermal power units for each time period, the ash removal synergy value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units for each time period, a dynamic control level is generated and adjusted accordingly.

[0011] Furthermore, the real-time data acquisition of basic coal-fired parameters by the laser-induced breakdown spectrum online monitoring device is specifically analyzed as follows: monitoring points are set up at the inlet of the coal-fired boiler, the inlet and outlet of the dust collector, and the inlet and outlet of the desulfurization tower. The sampling frequency is matched with the process fluctuation cycle to obtain the basic coal-fired data for each time period of each cycle. The basic coal-fired data includes the particulate matter concentration at the inlet of the dust collector, the particulate matter concentration at the outlet, the SO2 concentration at the inlet of the desulfurization tower, and the SO2 concentration at the outlet of the desulfurization tower for each time period of the dust removal and desulfurization of the thermal power unit.

[0012] Furthermore, the specific analysis method for analyzing the process efficiency index of dust removal and desulfurization of thermal power units at each time period is as follows: based on the obtained basic coal combustion data for each time period, analyze the dust removal efficiency index and desulfurization efficiency index of the power unit at each time period, and then analyze the process efficiency index of dust removal and desulfurization of thermal power units at each time period.

[0013] Furthermore, the specific analysis method for the dust removal efficiency index of the power unit's dust removal and desulfurization at each time period is as follows: Based on the obtained inlet and outlet particulate matter concentrations of the dust collector for each time period of the power unit's dust removal and desulfurization, the difference between the inlet and outlet particulate matter concentrations of the dust collector for each time period is processed and divided by the inlet particulate matter concentration of the dust collector to obtain the dust removal efficiency value of the dust collector for each time period. The dust removal efficiency value of the dust collector for each time period of the power unit's dust removal and desulfurization is compared with the dust removal efficiency conformity value of the dust collector for the power unit's dust removal and desulfurization stored in the database. If the dust removal efficiency value of the dust collector for a certain time period of the power unit's dust removal and desulfurization is greater than or equal to the dust removal efficiency conformity value of the dust collector, then the dust removal efficiency value of the dust collector for that time period is recorded as 1, otherwise it is recorded as -1, thereby obtaining the dust removal efficiency index for each time period of the power unit's dust removal and desulfurization, wherein the dust removal efficiency index includes 1 and -1.

[0014] Furthermore, the specific analysis method for the desulfurization efficiency index of the power unit at each time period is as follows: Based on the SO2 concentration at the inlet and outlet of the desulfurization tower for each time period of each cycle of the power unit's dust removal and desulfurization, the difference between the SO2 concentration at the inlet and outlet of the desulfurization tower for each time period of each cycle is calculated and divided by the SO2 concentration at the inlet of the desulfurization tower to obtain the desulfurization efficiency value for each time period of each cycle. The average value is then calculated to obtain the desulfurization efficiency index for each time period of the power unit's dust removal and desulfurization. The average desulfurization efficiency of each time period of the dust removal and desulfurization of the thermal power unit is compared with the average desulfurization efficiency of the thermal power unit stored in the database. If the average desulfurization efficiency of a certain time period of the dust removal and desulfurization of the thermal power unit is greater than or equal to the average desulfurization efficiency, the average desulfurization efficiency of that time period of the dust removal and desulfurization of the thermal power unit is recorded as 1, otherwise it is recorded as -1. Thus, the desulfurization efficiency index of each time period of the dust removal and desulfurization of the thermal power unit is obtained, where the desulfurization efficiency index includes 1 and -1.

[0015] Furthermore, the specific analysis method for the electrostatic precipitator's electric field control stability value and the desulfurization system's ash removal synergy value during different time periods of dust removal and desulfurization in thermal power units is as follows: Based on the obtained equipment operation data, including electrostatic precipitator operation data and desulfurization system operation data for each time period; wherein, the electrostatic precipitator operation data includes the electric field conduction duration, ash conveying air compressor system current value, and average electric field temperature for each time period of dust removal and desulfurization in thermal power units. The electric field conduction duration, ash conveying air compressor system current value, and average electric field temperature for each time period of dust removal and desulfurization in thermal power units are compared with the electric field conduction reference duration and ash conveying air compressor system current reference value stored in the database. By comparing the electric field's average reference temperature with the average electric field temperature, the electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate of the electrostatic precipitator equipment for each time period of the dust removal and desulfurization of the thermal power unit are obtained. If the electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate of the dust removal and desulfurization of the thermal power unit are within the safe range of electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate are within the safe range of temperature stability rate, then the electric field control stability value of the electrostatic precipitator equipment for that time period of the dust removal and desulfurization of the thermal power unit is recorded as 1; otherwise, it is recorded as -1. Thus, the electric field control stability value of the electrostatic precipitator equipment for each time period of the dust removal and desulfurization of the thermal power unit is obtained, including 1 and -1.

[0016] Based on the obtained desulfurization system operation data for each time period, including the desulfurizing agent supply frequency and slurry density of the thermal power unit's dust removal and desulfurization for each time period, the dust removal synergy value of the desulfurization system equipment for the thermal power unit's dust removal and desulfurization for each time period was analyzed.

[0017] Furthermore, the specific analysis method for analyzing the energy consumption and resource consumption index of each time period of dust removal and desulfurization in thermal power units is as follows: Based on the obtained energy consumption and resource data, which includes the cumulative energy consumption of the dust collector and the flue gas treatment volume of each time period of dust removal and desulfurization in thermal power units, the cumulative energy consumption of the dust collector and the flue gas treatment volume of each time period of dust removal and desulfurization in thermal power units are compared to obtain the dust removal flue gas energy consumption value of each time period. The energy consumption coincidence value of each historical time period is extracted from the database. The dust removal flue gas energy consumption value of each time period is compared with the dust removal flue gas energy consumption coincidence value. If the dust removal flue gas energy consumption value of a certain time period is less than or equal to the dust removal flue gas energy consumption coincidence value, the energy consumption and resource consumption index of the dust removal and desulfurization in thermal power units for that time period is recorded as -1, otherwise it is recorded as 1. Thus, the energy consumption and resource consumption index of each time period of dust removal and desulfurization in thermal power units is obtained, where the energy consumption and resource consumption index includes 1 and -1.

[0018] Furthermore, the specific analysis method for generating the dynamic control level is as follows: based on the obtained process efficiency index of dust removal and desulfurization of the thermal power unit at each time period. Stable values ​​of the electric field control of electrostatic precipitators for dust removal and desulfurization in thermal power units at different time periods. Co-efficiency value of dust removal in desulfurization system equipment Energy and resource consumption indices for dust removal and desulfurization of thermal power units at different time periods This allows us to obtain the various indices of the thermal power unit at different time periods.

[0019] Extract the process efficiency compliance index of dust removal and desulfurization of thermal power units for each time period from the database. The electric field control stability of electrostatic precipitators for dust removal and desulfurization in thermal power units at different time periods meets the following standards. Compatibility value with desulfurization system equipment for dust removal The energy and resource consumption of dust removal and desulfurization units in thermal power units at different time periods conforms to the index. For comparison.

[0020] like Then, the comprehensive coordinated control index of dust removal and desulfurization of thermal power units is recorded as the first-level control level, where... For logical symbols, This is represented by the number of each time period. , This represents the number of time periods.

[0021] like The comprehensive coordinated control index of dust removal and desulfurization of thermal power units is then denoted as the secondary control level, where... It is a logical symbol representing OR.

[0022] like If so, the comprehensive coordinated control index of dust removal and desulfurization of thermal power units will be recorded as the third-level control level.

[0023] Furthermore, the specific analysis method for the adjustment is as follows: when the control level is level one, maintain the existing coordinated control, maintain the monitoring frequency, and maintain the dust removal and desulfurization values. If a certain index of more than three thermal power units deviates from the compliance value in a certain period of time, a level two warning will be triggered.

[0024] When the control level is set to level 2, if the particulate matter concentration exceeds the preset threshold, the electric field voltage of the electrostatic precipitator is increased and the rapping cycle is shortened; if the SO2 concentration exceeds the preset threshold, the desulfurizing agent feed rate is increased and the number of circulating pumps in the desulfurization tower is increased; and the electric field current is increased synchronously with the electric field voltage to match the parameters of the electrostatic precipitator and the desulfurization system.

[0025] When the control level is three, reduce the electric field voltage, extend the rapping cycle, and reduce the frequency of linkage adjustment between the electrostatic precipitator and the desulfurization system, while maintaining the original monitoring frequency. Once all indices return to the specified values, immediately switch to the control level one.

[0026] The second aspect of the present invention provides an apparatus for implementing a synergistic control method for dust removal and desulfurization of thermal power units, characterized in that it includes: a governance synergistic analysis module: which collects basic coal-fired parameters in real time using a laser-induced breakdown spectrum online monitoring device to obtain basic coal-fired data and analyzes the process governance efficiency index of dust removal and desulfurization of thermal power units at different time periods.

[0027] Control and Coordination Analysis Module: The module collects real-time operating data of the electrostatic precipitator and desulfurization system of the thermal power unit through the equipment PLC system, obtains equipment operating data, and analyzes the electric field control stability value of the electrostatic precipitator equipment and the dust removal coordination value of the desulfurization system equipment at different time periods of the dust removal and desulfurization of the thermal power unit.

[0028] Target Collaborative Analysis Module: Real-time energy consumption data of the electrostatic precipitator is collected through high-precision energy meters, metering pumps, and flow meters to obtain energy consumption and resource data, and to analyze the energy consumption and resource consumption index of the thermal power unit in each time period of dust removal and desulfurization.

[0029] Dynamic control adjustment module: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units in each time period, the electric field control stability value of electrostatic precipitator equipment in each time period of dust removal and desulfurization of thermal power units, the ash removal coordination value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units in each time period, a dynamic control level is generated and adjusted.

[0030] The beneficial effects of this invention are as follows: First, by combining collaborative governance analysis and real-time data collection from multiple monitoring points with the calculation of dust removal efficiency index and desulfurization efficiency index, a linkage governance mechanism for dust removal and desulfurization systems is constructed. This solves the efficiency disconnect problem caused by traditional segmented governance and independent control, effectively improving collaborative governance efficiency and ensuring that pollutants such as dust and SO2 consistently meet emission standards in the long term, thus complying with environmental governance requirements. Second, based on multi-dimensional data support including the process governance efficiency index of dust removal and desulfurization in thermal power units at various time periods, the electric field control stability value of electrostatic precipitator equipment at various time periods, the dust removal coordination value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization in thermal power units at various time periods, first-level, second-level, and third-level dynamic control levels are generated and automatically adjusted. This constructs an intelligent control system adapted to fluctuations in operating conditions, eliminating the need for frequent manual intervention in parameter adjustments. This reduces manual operation costs and avoids the lag and error of manual adjustments, improving the stability and intelligence level of system operation. Third, by analyzing the energy and resource consumption indices of the dust removal and desulfurization of thermal power units at different time periods and optimizing them specifically within the three-level control system, a deep integration of achieving treatment effectiveness and energy-saving optimization was achieved. This avoided energy waste caused by excessive control and reduced resource consumption through dynamic adjustments, ultimately lowering the overall operating energy consumption of the dust removal and desulfurization system of thermal power units, thus balancing environmental protection and economy. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. 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.

[0032] Figure 1 This is a schematic diagram of the implementation steps of the method of the present invention.

[0033] Figure 2 This is a schematic diagram of the system structure connection of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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.

[0035] Reference Figure 1 As shown, the present invention provides a method and device for coordinated control of dust removal and desulfurization in thermal power units, including step one, coordinated analysis of treatment, step two, coordinated analysis of control, step three, coordinated analysis of targets and step four, dynamic adjustment of control.

[0036] Step 1: Governance Collaboration Analysis: Real-time data acquisition of basic coal-fired parameters is conducted using a laser-induced breakdown spectroscopy online monitoring device to obtain basic coal-fired data, and the process governance efficiency index of dust removal and desulfurization in thermal power units at different time periods is analyzed.

[0037] Step 2: Control Coordination Analysis: Real-time operation data of the electrostatic precipitator and desulfurization system of the thermal power unit is collected through the equipment PLC system to obtain equipment operation data. The electric field control stability value of the electrostatic precipitator equipment and the dust removal coordination value of the desulfurization system equipment are analyzed at different time periods of dust removal and desulfurization of the thermal power unit.

[0038] Step 3: Target Collaborative Analysis: Real-time energy consumption data of the electrostatic precipitator is collected using high-precision energy meters, metering pumps, and flow meters to obtain energy consumption and resource data, and the energy consumption and resource consumption index of the thermal power unit in dust removal and desulfurization at different time periods is analyzed.

[0039] Step 4: Dynamic Control Adjustment: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units for each time period, the electric field control stability value of electrostatic precipitator equipment for dust removal and desulfurization of thermal power units for each time period, the ash removal synergy value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units for each time period, a dynamic control level is generated and adjusted accordingly.

[0040] In the above embodiments, the real-time data acquisition of basic coal-fired parameters by the laser-induced breakdown spectrum online monitoring device is specifically analyzed as follows: monitoring points are set up at the inlet of the coal-fired boiler, the inlet and outlet of the dust collector, and the inlet and outlet of the desulfurization tower. The sampling frequency is matched with the process fluctuation cycle to obtain the basic coal-fired data for each time period of each cycle. The basic coal-fired data includes the particulate matter concentration at the inlet of the dust collector, the particulate matter concentration at the outlet, the SO2 concentration at the inlet of the desulfurization tower, and the SO2 concentration at the outlet of the desulfurization tower for each time period of the dust removal and desulfurization of the thermal power unit.

[0041] In the above embodiments, the specific analysis method for analyzing the process efficiency index of dust removal and desulfurization of thermal power units at each time period is as follows: based on the obtained basic coal combustion data for each time period, analyze the dust removal efficiency index and desulfurization efficiency index of the power unit at each time period, and then analyze the process efficiency index of dust removal and desulfurization of thermal power units at each time period.

[0042] In the above embodiments, the specific analysis method for analyzing the dust removal efficiency index of the power unit's dust removal and desulfurization at each time period is as follows: Based on the obtained particulate matter concentration at the inlet and outlet of the dust collector for each time period of the power unit's dust removal and desulfurization, the difference between the particulate matter concentration at the inlet and outlet of the dust collector for each time period is processed and divided by the particulate matter concentration at the inlet of the dust collector to obtain the dust removal efficiency value of the dust collector for each time period. The dust removal efficiency value of the dust collector for each time period of the power unit's dust removal and desulfurization is compared with the dust removal efficiency conformity value of the dust collector for the power unit's dust removal and desulfurization stored in the database. If the dust removal efficiency value of the dust collector for a certain time period of the power unit's dust removal and desulfurization is greater than or equal to the dust removal efficiency conformity value of the dust collector, then the dust removal efficiency value of the dust collector for that time period is recorded as 1, otherwise it is recorded as -1, thereby obtaining the dust removal efficiency index for each time period of the power unit's dust removal and desulfurization, wherein the dust removal efficiency index includes 1 and -1.

[0043] In the above embodiments, the specific analysis method for analyzing the desulfurization efficiency index of the power unit at each time period is as follows: Based on the obtained SO2 concentrations at the inlet and outlet of the desulfurization tower for each time period of each cycle of the thermal power unit's dust removal and desulfurization, the difference between the SO2 concentrations at the inlet and outlet of the desulfurization tower for each time period of each cycle is processed and divided by the SO2 concentration at the inlet of the desulfurization tower to obtain the desulfurization efficiency value for each time period of each cycle. Then, the average value is calculated to obtain the desulfurization efficiency index for each time period of the thermal power unit's dust removal and desulfurization. The average desulfurization efficiency of each time period is compared with the average desulfurization efficiency of the thermal power unit in the database. If the average desulfurization efficiency of the thermal power unit in a certain time period is greater than or equal to the average desulfurization efficiency, the average desulfurization efficiency of the thermal power unit in that time period is recorded as 1, otherwise it is recorded as -1. Thus, the desulfurization efficiency index of each time period of the thermal power unit dust removal and desulfurization is obtained, where the desulfurization efficiency index includes 1 and -1.

[0044] In the above embodiments, the specific analysis method for analyzing the electric field control stability value of the electrostatic precipitator equipment and the ash removal synergy value of the desulfurization system equipment at each time period of the dust removal and desulfurization of the thermal power unit is as follows: based on the obtained equipment operation data, including: electrostatic precipitator operation data and desulfurization system operation data at each time period; wherein, the electrostatic precipitator operation data includes the electric field conduction duration, ash conveying air compressor system current value, and average electric field temperature at each time period of the dust removal and desulfurization of the thermal power unit; the electric field conduction duration, ash conveying air compressor system current value, and average electric field temperature at each time period of the dust removal and desulfurization of the thermal power unit are compared with the electric field conduction reference duration and ash conveying air compressor system current reference stored in the database. The electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate of the electrostatic precipitator equipment for each time period of dust removal and desulfurization of the thermal power unit are obtained by comparing the reference value and the average reference temperature of the electric field. If the electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate of the electrostatic precipitator equipment for dust removal and desulfurization of the thermal power unit are within the safe range of electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate are within the safe range of temperature stability rate, then the electric field control stability value of the electrostatic precipitator equipment for that time period of dust removal and desulfurization of the thermal power unit is recorded as 1, otherwise it is recorded as -1. Thus, the electric field control stability value of the electrostatic precipitator equipment for each time period of dust removal and desulfurization of the thermal power unit is obtained. The electric field control stability value includes 1 and -1.

[0045] Based on the obtained desulfurization system operation data for each time period, including the desulfurizing agent supply frequency and slurry density of the thermal power unit's dust removal and desulfurization for each time period, the dust removal synergy value of the desulfurization system equipment for the thermal power unit's dust removal and desulfurization for each time period was analyzed.

[0046] It should be noted that the analysis of the dust removal synergy values ​​of the desulfurization system equipment in each time period of the thermal power unit is the same as the analysis method described above.

[0047] In the above embodiments, the specific analysis method for analyzing the energy consumption and resource consumption index of each time period of dust removal and desulfurization of thermal power units is as follows: Based on the obtained energy consumption and resource data, which includes the cumulative energy consumption of the dust collector and the flue gas treatment volume of each time period of dust removal and desulfurization of thermal power units, the cumulative energy consumption of the dust collector and the flue gas treatment volume of each time period of dust removal and desulfurization of thermal power units are compared to obtain the dust removal flue gas energy consumption value of each time period. The energy consumption coincidence value of each historical time period is extracted from the database. The dust removal flue gas energy consumption value of each time period is compared with the dust removal flue gas energy consumption coincidence value. If the dust removal flue gas energy consumption value of a certain time period is less than or equal to the dust removal flue gas energy consumption coincidence value, the energy consumption and resource consumption index of the dust removal and desulfurization of thermal power units for that time period is recorded as -1, otherwise it is recorded as 1. Thus, the energy consumption and resource consumption index of each time period of dust removal and desulfurization of thermal power units is obtained, wherein the energy consumption and resource consumption index includes 1 and -1.

[0048] In the above embodiments, the specific analysis method for generating the dynamic control level is as follows: based on the obtained process efficiency index of dust removal and desulfurization of the thermal power unit at each time period. Stable values ​​of the electric field control of electrostatic precipitators for dust removal and desulfurization in thermal power units at different time periods. Co-efficiency value of dust removal in desulfurization system equipment Energy and resource consumption indices for dust removal and desulfurization of thermal power units at different time periods This allows us to obtain the various indices of the thermal power unit at different time periods.

[0049] Extract the process efficiency compliance index of dust removal and desulfurization of thermal power units for each time period from the database. The electric field control stability of electrostatic precipitators for dust removal and desulfurization in thermal power units at different time periods meets the following standards. Compatibility value with desulfurization system equipment for dust removal The energy and resource consumption of dust removal and desulfurization units in thermal power units at different time periods conforms to the index. For comparison.

[0050] like Then, the comprehensive coordinated control index of dust removal and desulfurization of thermal power units is recorded as the first-level control level, where... For logical symbols, This is represented by the number of each time period. , This represents the number of time periods.

[0051] like The comprehensive coordinated control index of dust removal and desulfurization of thermal power units is then denoted as the secondary control level, where... It is a logical symbol representing OR.

[0052] like If so, the comprehensive coordinated control index of dust removal and desulfurization of thermal power units will be recorded as the third-level control level.

[0053] In the above embodiments, the specific analysis method for making adjustments is as follows: when the control level is level one, maintain the existing coordinated control, maintain the monitoring frequency, and maintain the dust removal and desulfurization values. If a certain index of more than three thermal power units deviates from the compliance value for a certain period of time, a level two warning is triggered.

[0054] It should be noted that maintaining the existing coordinated control means maintaining the current dust removal efficiency, desulfurization efficiency, and energy consumption level of the dust removal and desulfurization system.

[0055] When the control level is set to level 2, if the particulate matter concentration exceeds the preset threshold, the electric field voltage of the electrostatic precipitator is increased and the rapping cycle is shortened; if the SO2 concentration exceeds the preset threshold, the desulfurizing agent feed rate is increased and the number of circulating pumps in the desulfurization tower is increased; and the electric field current is increased synchronously with the electric field voltage to match the parameters of the electrostatic precipitator and the desulfurization system.

[0056] It should be noted that when the particulate matter concentration exceeds the preset threshold, it indicates insufficient focusing dust removal efficiency. Increasing the electric field voltage of the electrostatic precipitator can enhance the adsorption capacity of particulate matter. Shortening the rapping cycle from 2 cycles to 1 week can improve the particulate matter stripping efficiency and increase the particulate matter removal rate. When the SO2 concentration exceeds the preset threshold, it indicates insufficient focusing desulfurization efficiency. Increasing the desulfurizing agent feed rate and strengthening the SO2 reaction raw material supply, as well as increasing the number of circulating pumps in the desulfurization tower, can improve the slurry atomization effect and reaction contact area. Increasing the electric field current synchronously with the electric field voltage and matching the parameters of the electrostatic precipitator with those of the desulfurization system can avoid system synergy imbalance caused by a single adjustment.

[0057] When the control level is three, reduce the electric field voltage, extend the rapping cycle, and reduce the frequency of linkage adjustment between the electrostatic precipitator and the desulfurization system, while maintaining the original monitoring frequency. Once all indices return to the specified values, immediately switch to the control level one.

[0058] It should be noted that reducing the electric field voltage and extending the rapping cycle can prevent excessive dust removal and wear on the electric field plates. Reducing the amount of compressed air is also necessary to reduce unnecessary energy consumption, lower system operating costs, and reduce the frequency of linkage adjustment between the electrostatic precipitator and the desulfurization system to avoid energy waste and equipment fatigue caused by frequent operation.

[0059] Reference Figure 2 As shown, the present invention provides an apparatus for a synergistic control method for dust removal and desulfurization of thermal power units, characterized in that it includes: a synergistic control analysis module: which collects real-time data on basic coal parameters through a laser-induced breakdown spectrum online monitoring device to obtain basic coal data and analyzes the process control efficiency index of dust removal and desulfurization of thermal power units at different time periods.

[0060] Control and Coordination Analysis Module: The module collects real-time operating data of the electrostatic precipitator and desulfurization system of the thermal power unit through the equipment PLC system, obtains equipment operating data, and analyzes the electric field control stability value of the electrostatic precipitator equipment and the dust removal coordination value of the desulfurization system equipment at different time periods of the dust removal and desulfurization of the thermal power unit.

[0061] Target Collaborative Analysis Module: Real-time energy consumption data of the electrostatic precipitator is collected through high-precision energy meters, metering pumps, and flow meters to obtain energy consumption and resource data, and to analyze the energy consumption and resource consumption index of the thermal power unit in each time period of dust removal and desulfurization.

[0062] Dynamic control adjustment module: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units in each time period, the electric field control stability value of electrostatic precipitator equipment in each time period of dust removal and desulfurization of thermal power units, the ash removal coordination value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units in each time period, a dynamic control level is generated and adjusted.

[0063] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, and all such modifications and additions should fall within the protection scope of the present invention.

Claims

1. A method for coordinated control of dust removal and desulfurization of a thermal power unit, characterized in that, include: Step 1: Governance Collaboration Analysis: Real-time data acquisition of basic coal-fired parameters is conducted using a laser-induced breakdown spectroscopy online monitoring device to obtain basic coal-fired data, and the process governance efficiency index of dust removal and desulfurization of thermal power units at different time periods is analyzed. Step 2: Control Coordination Analysis: Real-time operation data of the electrostatic precipitator and desulfurization system of the thermal power unit is collected through the equipment PLC system to obtain equipment operation data. The electric field control stability value of the electrostatic precipitator equipment and the dust removal coordination value of the desulfurization system equipment are analyzed at different time periods of dust removal and desulfurization of the thermal power unit. Step 3, Target Collaborative Analysis: Real-time energy consumption data of the electrostatic precipitator is collected through high-precision energy meters, metering pumps and flow meters to obtain energy consumption and resource data, and to analyze the energy consumption and resource consumption index of the thermal power unit in each time period of dust removal and desulfurization. Step 4: Dynamic Control Adjustment: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units for each time period, the electric field control stability value of electrostatic precipitator equipment for dust removal and desulfurization of thermal power units for each time period, the ash removal synergy value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units for each time period, a dynamic control level is generated and adjusted accordingly.

2. The method according to claim 1, characterized in that, The specific analysis method for real-time data acquisition of basic coal combustion parameters using the laser-induced breakdown spectroscopy online monitoring device is as follows: Monitoring points were set up at the inlet of the coal-fired boiler, the inlet and outlet of the dust collector, and the inlet and outlet of the desulfurization tower. The sampling frequency was matched with the process fluctuation cycle to obtain the basic coal-fired data for each time period of each cycle. The basic coal-fired data included the particulate matter concentration at the inlet of the dust collector, the particulate matter concentration at the outlet, the SO2 concentration at the inlet of the desulfurization tower, and the SO2 concentration at the outlet of the desulfurization tower for each time period of the dust removal and desulfurization of the thermal power unit.

3. The method according to claim 2, characterized in that, The specific analysis method for the process efficiency index of dust removal and desulfurization of thermal power units at different time periods is as follows: Based on the obtained coal-fired basic data for each time period, the dust removal efficiency index and desulfurization efficiency index of the power unit dust removal and desulfurization for each time period are analyzed, and then the process control efficiency index of the thermal power unit dust removal and desulfurization for each time period is analyzed.

4. The method for coordinated dust removal and desulfurization control of thermal power units according to claim 3, characterized in that, The specific analysis method for the dust removal efficiency index of the generator set at different time periods is as follows: Based on the obtained particulate matter concentrations at the inlet and outlet of the dust collector for each time period of the desulfurization and dust removal process of the thermal power unit, the difference between the inlet and outlet particulate matter concentrations for each time period is calculated and divided by the inlet particulate matter concentration to obtain the dust removal efficiency value of the dust collector for each time period. The dust removal efficiency value of the dust collector for each time period of the desulfurization and dust removal process of the thermal power unit is compared with the dust removal efficiency compliance value of the dust collector for the desulfurization and dust removal process of the thermal power unit stored in the database. If the dust removal efficiency value of the dust collector for a certain time period of the desulfurization and dust removal process of the thermal power unit is greater than or equal to the dust removal efficiency compliance value, the dust removal efficiency value of the dust collector for that time period is recorded as 1, otherwise it is recorded as -1. Thus, the dust removal efficiency index for each time period of the desulfurization and dust removal process of the thermal power unit is obtained, where the dust removal efficiency index includes 1 and -1.

5. The method for coordinated dust removal and desulfurization control of thermal power units according to claim 3, characterized in that, The specific analysis method for the desulfurization efficiency index of the generator set at different time periods is as follows: Based on the SO2 concentrations at the inlet and outlet of the desulfurization tower for each time period of each cycle of the desulfurization and dust removal process of the thermal power unit, the difference between the SO2 concentrations at the inlet and outlet of the desulfurization tower for each time period of each cycle is processed and divided by the SO2 concentration at the inlet of the desulfurization tower to obtain the desulfurization efficiency value for each time period of each cycle. The average value is then calculated to obtain the average desulfurization efficiency for each time period of the desulfurization and dust removal process of the thermal power unit. The average desulfurization efficiency for each time period of the desulfurization and dust removal process of the thermal power unit is compared with the average desulfurization efficiency of the thermal power unit stored in the database. If the average desulfurization efficiency for a certain time period of the desulfurization and dust removal process of the thermal power unit is greater than or equal to the average desulfurization efficiency, the average desulfurization efficiency for that time period of the desulfurization and dust removal process of the thermal power unit is recorded as 1, otherwise it is recorded as -1. Thus, the desulfurization efficiency index for each time period of the desulfurization and dust removal process of the thermal power unit is obtained, where the desulfurization efficiency index includes 1 and -1.

6. The method for coordinated dust removal and desulfurization control of thermal power units according to claim 1, characterized in that, The specific analysis method for the electric field control stability value of the electrostatic precipitator equipment and the dust removal synergy value of the desulfurization system equipment at different time periods of the dust removal and desulfurization of thermal power units is as follows: Based on the obtained equipment operation data, including electrostatic precipitator operation data and desulfurization system operation data for each time period; among which, the electrostatic precipitator operation data includes the electric field conduction duration, ash conveying air compressor system current value, and average electric field temperature for each time period of dust removal and desulfurization in thermal power units. The electric field conduction duration, ash conveying air compressor system current value, and average electric field temperature for each time period of dust removal and desulfurization in thermal power units are compared with reference electric field conduction duration, reference ash conveying air compressor system current value, and reference electric field temperature stored in the database to obtain the values ​​for each time period of dust removal and desulfurization in thermal power units. The electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate of the dust removal and desulfurization of the thermal power unit are determined. If the electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate of the dust removal and desulfurization of the thermal power unit are within the safe range of electric field conductivity, ash conveying air compressor system current fluctuation rate, and temperature stability rate are within the safe range of temperature stability rate, then the electric field control stability value of the electrostatic precipitator equipment for the dust removal and desulfurization of the thermal power unit during that time period is recorded as 1, otherwise it is recorded as -1. Thus, the electric field control stability value of the electrostatic precipitator equipment for each time period of the dust removal and desulfurization of the thermal power unit is obtained. The electric field control stability value includes 1 and -1. Based on the obtained desulfurization system operation data for each time period, including the desulfurizing agent supply frequency and slurry density of the thermal power unit's dust removal and desulfurization for each time period, the dust removal synergy value of the desulfurization system equipment for the thermal power unit's dust removal and desulfurization for each time period was analyzed.

7. The method for coordinated dust removal and desulfurization control of thermal power units according to claim 1, characterized in that, The specific analysis method for the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units at different time periods is as follows: Based on the obtained energy consumption and resource data, which includes the cumulative energy consumption of dust collectors and flue gas treatment volume of the thermal power unit's dust removal and desulfurization in each time period, the cumulative energy consumption of dust collectors and flue gas treatment volume of the thermal power unit's dust removal and desulfurization in each time period are compared to obtain the dust removal flue gas energy consumption value for each time period. The energy consumption coincidence value of each historical time period is extracted from the database. The dust removal flue gas energy consumption value of each time period is compared with the dust removal flue gas energy consumption coincidence value. If the dust removal flue gas energy consumption value of a certain time period is less than or equal to the dust removal flue gas energy consumption coincidence value, the energy consumption and resource consumption index of the thermal power unit's dust removal and desulfurization in that time period is recorded as -1, otherwise it is recorded as 1. Thus, the energy consumption and resource consumption index of the thermal power unit's dust removal and desulfurization in each time period is obtained, where the energy consumption and resource consumption index includes 1 and -1.

8. The method for coordinated dust removal and desulfurization control of thermal power units according to claim 1, characterized in that, The specific analysis method for generating the dynamic control level is as follows: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units at different time periods Stable values ​​of the electric field control of electrostatic precipitators for dust removal and desulfurization in thermal power units at different time periods. Co-efficiency value of dust removal in desulfurization system equipment Energy and resource consumption indices for dust removal and desulfurization of thermal power units at different time periods This allows us to obtain the various indices of the thermal power unit at different time periods. Extract the process efficiency compliance index of dust removal and desulfurization of thermal power units for each time period from the database. The electric field control stability of electrostatic precipitators for dust removal and desulfurization in thermal power units at different time periods meets the following standards. Compatibility value with desulfurization system equipment for dust removal The energy and resource consumption of dust removal and desulfurization units in thermal power units at different time periods conforms to the index. For comparison; like Then, the comprehensive coordinated control index of dust removal and desulfurization of thermal power units is recorded as the first-level control level, where... For logical symbols, This is represented by the number of each time period. , This represents the number of time periods; like The comprehensive coordinated control index of dust removal and desulfurization of thermal power units is then denoted as the secondary control level, where... The logical symbol represents OR; like If so, the comprehensive coordinated control index of dust removal and desulfurization of thermal power units will be recorded as the third-level control level.

9. The method for coordinated control of dust removal and desulfurization in thermal power units according to claim 1, characterized in that, The specific analysis method for making the adjustment is as follows: When the control level is Level 1, the existing coordinated control is maintained, the monitoring frequency is maintained, and the dust removal and desulfurization values ​​are maintained. If a certain index of more than three thermal power units deviates from the compliance value in a certain period of time, a Level 2 warning is triggered. When the control level is level 2, if the particulate matter concentration is greater than the preset threshold, the electric field voltage of the electrostatic precipitator is increased and the rapping cycle is shortened; if the SO2 concentration is greater than the preset threshold, the desulfurizing agent feed rate is increased and the number of circulating pumps in the desulfurization tower is increased; and the electric field current is increased synchronously with the electric field voltage to match the parameters of the electrostatic precipitator and the desulfurization system. When the control level is three, reduce the electric field voltage, extend the rapping cycle, and reduce the frequency of linkage adjustment between the electrostatic precipitator and the desulfurization system, while maintaining the original monitoring frequency. Once all indices return to the specified values, immediately switch to the control level one.

10. An apparatus for executing the dust removal and desulfurization coordinated control method for thermal power units according to any one of claims 1-9, characterized in that, include: Governance Collaborative Analysis Module: Real-time data acquisition of basic coal-fired parameters is performed using a laser-induced breakdown spectroscopy online monitoring device to obtain basic coal-fired data and analyze the process governance efficiency index of dust removal and desulfurization of thermal power units at different time periods; Control and Coordination Analysis Module: The PLC system of the equipment collects real-time operating data of the electrostatic precipitator and desulfurization system of the thermal power unit, obtains equipment operating data, and analyzes the electric field control stability value of the electrostatic precipitator equipment and the dust removal coordination value of the desulfurization system equipment in each time period of the dust removal and desulfurization of the thermal power unit. Target Collaborative Analysis Module: Real-time energy consumption data of the electrostatic precipitator is collected through high-precision energy meters, metering pumps and flow meters to obtain energy consumption and resource data, and to analyze the energy consumption and resource consumption index of the thermal power unit in each time period of dust removal and desulfurization. Dynamic control adjustment module: Based on the obtained process efficiency index of dust removal and desulfurization of thermal power units in each time period, the electric field control stability value of electrostatic precipitator equipment in each time period of dust removal and desulfurization of thermal power units, the ash removal coordination value of desulfurization system equipment, and the energy consumption and resource consumption index of dust removal and desulfurization of thermal power units in each time period, a dynamic control level is generated and adjusted.

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