Flue gas desulfurization control system for large coal-fired power plant

Abstract

The invention relates to the technical field of environmental engineering, and discloses a large-scale coal-fired power plant flue gas desulfurization control system, which comprises a monitoring module, an evaluation module, a cleaning module and a manual intervention module, and is characterized in that the monitoring module is used for monitoring parameters in equipment and sending the monitored parameters to the evaluation module through a network; the evaluation module evaluates the cleaning state according to the received parameter data, a cleaning signal is sent to the cleaning module through a network when the cleaning state is evaluated to be the condition that cleaning is needed, and the cleaning module receives the cleaning signal to clean the equipment and calculates the internal cleaning effect after cleaning; whether manual intervention is needed or not is judged according to the cleaning effect, an intervention signal is sent to the manual intervention module for manual deep cleaning when it is judged that manual intervention is needed, the working environment of the equipment is comprehensively analyzed for dynamic cleaning, the service life of the equipment is prolonged, the working environment in the equipment is improved, and manual labor is saved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental engineering, in particular to a flue gas desulfurization control system for a large coal-fired power plant. Background Art

[0002] With the rapid advancement of global industrialization and urbanization, energy consumption has increased dramatically. Coal, as one of the main sources of energy, occupies an important position in electricity production. Coal-fired power plants are facilities that use coal as the main fuel to generate electricity. Although its combustion process will produce pollutants, coal is still the main source of energy in many countries and regions due to its abundant reserves and relatively low cost. Coal-fired power plants generate heat energy by burning coal to drive steam turbines or gas turbines to generate electricity and provide electricity for industrial production and residents' lives. Coal combustion is one of the main sources of pollutants such as SO2, NOx (nitrogen oxides), CO2 (carbon dioxide) and particulate matter. These pollutants pose a serious threat to the atmospheric environment, ecosystems and human health, especially SO2, which can combine with water vapor in the air to form acid rain, causing damage to soil, water bodies, buildings and the human respiratory system. In addition, CO2, as a greenhouse gas, has aggravated the trend of global warming and posed a serious threat to the environment and human health. Therefore, coal-fired power plants must take effective measures to control SO2 emissions to meet increasingly stringent environmental regulations.

[0003] The existing flue gas desulfurization control system of large coal-fired power plants has played an important role in reducing sulfur dioxide emissions. However, during the wet desulfurization process, the equipment is in long-term contact with acidic slurry and is prone to corrosion. At the same time, gypsum crystals may form scale on the inner walls of the equipment and pipelines, causing blockage, which requires cleaning the inside of the equipment. The existing cleaning system is generally cleaned regularly by personnel or set a cleaning cycle for regular cleaning. It is impossible to dynamically clean according to actual conditions, resulting in untimely internal cleaning, reduced strength and durability of the equipment, shortened its service life, uneven flue gas flow rate, and affected desulfurization efficiency. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a flue gas desulfurization control system for a large coal-fired power plant, which has the function of real-time monitoring the working environment inside the equipment through a variety of parameters, and can comprehensively evaluate the probability of blockage, wear, and pollutant adhesion inside the equipment, and then dynamically clean the inside of the equipment according to the evaluation results, thereby effectively preventing the occurrence of possible blockage and wear problems inside the equipment, extending the service life of the equipment, improving the working environment inside the equipment, the working efficiency and effect of the equipment, reducing the tediousness of manual cleaning, and saving manual labor, etc.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-scale coal-fired power plant flue gas desulfurization control system, comprising a monitoring module, an evaluation module, a cleaning module and a manual intervention module, wherein the monitoring module is used to monitor parameters inside the equipment, and send the monitored parameters to the evaluation module through a network, and the evaluation module evaluates the cleaning status according to the received parameter data, and sends a cleaning signal to the cleaning module through the network when the cleaning status is evaluated as needing cleaning, and the cleaning module receives the cleaning signal to clean the equipment, and calculates the internal cleaning effect after cleaning, and determines whether manual intervention is needed according to the cleaning effect, and sends an intervention signal to the manual intervention module when it is determined that manual intervention is needed;

[0008] The monitoring module connects multiple monitors through a network to monitor the calcium sulfate concentration in the slurry, slurry flow, flue gas volume flow, internal temperature of the equipment, and oxidation air volume in real time, and numbers them to form a calcium sulfate concentration data set TSj, a slurry flow data set JLj, a flue gas volume flow data set YTj, a temperature data set NWj, and an oxidation air volume data set YFj;

[0009] The cleaning module includes a cleaning unit, a cleaning monitoring unit and an automatic liquid storage unit. The cleaning unit is internally connected with a cleaning device. After receiving a cleaning signal, the cleaning device is controlled to start the equipment cleaning through the network. The cleaning monitoring unit is internally connected with a liquid level monitor. The pre-storage amount Qxyc of the cleaning liquid is monitored through the liquid level monitor. When the pre-storage amount of the cleaning liquid is insufficient, a replenishment signal is sent to the automatic liquid storage unit, and the automatic liquid storage unit replenishes the cleaning liquid.

[0010] After receiving the intervention signal, the manual intervention module sends the intervention signal to the cleaning staff for manual deep cleaning.

[0011] Preferably, the multiple monitors in the monitoring module include an online concentration meter, a flow meter, and a temperature sensor. The online concentration meter is used to monitor calcium sulfate concentration data, the flow meter is used to monitor slurry flow data, flue gas volume flow data, and oxidation air volume data, and the temperature sensor is used to monitor internal temperature data of the equipment.

[0012] Preferably, the expression of the calcium sulfate concentration data set TSj is:

[0013] TSj=Lsgn1, Lsgn2, Lsgn3,···,Lsgn n

[0014] Among them, Lsgn1 is the first calcium sulfate concentration data in the calcium sulfate concentration data set, Lsgn nThe last calcium sulfate concentration data in the calcium sulfate concentration data set, n represents the number of data in the data set;

[0015] The expression of the slurry flow data set JLj is:

[0016] JLj=Jyll1, Jyll2, Jyll3,···,Jyll n

[0017] Among them, Lsgn1 is the first slurry flow data in the slurry flow data set, Jyll n is the last slurry flow data in the slurry flow data set, and n represents the number of data in the data set.

[0018] Preferably, the expression of the flue gas volume flow data set YTj is:

[0019] YTj=Yqtj1, Yqtj2, Yqtj3,···,Yqtj n

[0020] Among them, Yqtj1 is the first flue gas volume flow data in the flue gas volume flow data set, Yqtj n The last flue gas volume flow data in the flue gas volume flow data set, n represents the number of data in the data set;

[0021] The expression of the temperature data set NWj is:

[0022] NWj=Swsj1, Swsj2, Swsj3,···,Swsj n

[0023] Among them, Swsj1 is the first temperature data in the temperature data set, Swsj n is the last temperature data in the temperature data set, and n represents the number of data in the data set;

[0024] The expression of the oxidation air volume data set YFj is:

[0025] YFj=Yhfl1, Yhfl2, Yhfl3,···,Yhfl n

[0026] Among them, Yhfl1 is the first oxidation air volume data in the oxidation air volume data set, Yhfl n is the last oxidation air volume data in the oxidation air volume data set, and n represents the number of data in the data set.

[0027] Preferably, the cleaning status assessment method is:

[0028] The evaluation module calculates the internal pollution degree Sbwr of the equipment according to the calcium sulfate concentration data set TSj, the slurry flow data set JLj, the flue gas volume flow data set YTj, the temperature data set NWj, and the oxidation air volume data set YFj.

[0029] Preferably, the calculation formula of the internal pollution degree Sbwr of the equipment is:

[0030]

[0031] Among them, Lsgn i , Jyll i , Yqtj i 、Swsj i , Yhfl i are the i-th data in the acid calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively. They are the sum of the data from i=1 to i=n in the acid-calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively. α, β, γ, δ, and ε are the corresponding weights of the acid-calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively.

[0032] Preferably, the cleaning status assessment method is:

[0033] When the internal contamination degree Sbwr of the device is greater than the internal contamination threshold of the device, it is determined that the current device needs to be cleaned, and a cleaning signal is sent to the cleaning module.

[0034] Preferably, the cleaning effect Qxxg calculation formula is:

[0035]

[0036] Among them, Lsgn s , Jyll s , Yqtj s 、Swsj s , Yhfl s They are the real-time calcium acid concentration data, slurry flow data, flue gas volume flow data, temperature data, oxidation air volume data after cleaning, Lsgn b , Jyll b , Yqtj b 、Swsj b , Yhfl bThey are acid calcium concentration data, slurry flow data, flue gas volume flow data, temperature data, and oxidation air volume data under standard conditions, and 5 are the five factors for evaluating the cleaning effect.

[0037] Preferably, when the cleaning effect Qxxg is greater than the internal contamination threshold of the equipment, an intervention signal is sent to the manual intervention module.

[0038] Preferably, the calculation formula of the pre-storage amount of cleaning liquid Qxyc is:

[0039] Qxyc=Qxyc s -Qxyc d

[0040] Among them, Qxyc s The real-time cleaning fluid inventory monitored by the liquid level monitor, Qxyc d It is the minimum pre-stock amount of the cleaning liquid. When the calculation result of the pre-stock amount of the cleaning liquid Qxyc is less than 0, it is determined that the current pre-stock amount of the cleaning liquid is insufficient.

[0041] Compared with the prior art, the present invention provides a flue gas desulfurization control system for a large coal-fired power plant, which has the following beneficial effects:

[0042] 1. The present invention monitors the equipment through a calcium sulfate concentration data set, a slurry flow data set, a flue gas volume flow data set, a temperature data set, and an oxidation air volume data set, and then calculates the internal contamination degree of the equipment in combination with the data set, and performs cleaning according to the internal contamination degree of the equipment, which can comprehensively evaluate the probability of blockage, wear, and pollutant adhesion inside the equipment, and understand and grasp the working environment inside the equipment in real time, and perform automatic dynamic cleaning according to the calculation results, which can effectively prevent the occurrence of possible blockage and wear problems inside the equipment, extend the service life of the equipment, ensure that the oxidation reaction in the desulfurization process is fully carried out, maintain the material balance and reaction rate inside the system, and at the same time, dynamic cleaning can reduce the tediousness of manual cleaning, save manual labor, and improve the cleaning effect. The cleaning effect is then evaluated, which solves the problem of incomplete cleaning that may exist in automatic cleaning, and improves the working environment inside the equipment, the working efficiency and effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the structural system of the present invention; DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1 , a large-scale coal-fired power plant flue gas desulfurization control system, including a monitoring module, an evaluation module, a cleaning module and a manual intervention module, the monitoring module is used to monitor parameters inside the equipment, and send the monitored parameters to the evaluation module through the network;

[0046] The monitoring module connects multiple monitors through the network to monitor the calcium sulfate concentration in the slurry, slurry flow, flue gas volume flow, internal temperature of the equipment, and oxidation air volume in real time, and numbers them to form a calcium sulfate concentration data set TSj, a slurry flow data set JLj, a flue gas volume flow data set YTj, a temperature data set NWJ, and an oxidation air volume data set YFj;

[0047] The multiple monitors in the monitoring module include an online concentration meter, a flow meter, and a temperature sensor. The online concentration meter is used to monitor calcium sulfate concentration data, the flow meter is used to monitor slurry flow data, flue gas volume flow data, and oxidation air volume data, and the temperature sensor is used to monitor the internal temperature data of the equipment;

[0048] The expression of the calcium sulfate concentration data set TSj is:

[0049] TSj=Lsgn1, Lsgn2, Lsgn3,···,Lsgn n

[0050] Among them, Lsgn1 is the first calcium sulfate concentration data in the calcium sulfate concentration data set, Lsgn n The last calcium sulfate concentration data in the calcium sulfate concentration data set, n represents the number of data in the data set;

[0051] The expression of the slurry flow data set JLj is:

[0052] JLj=Jyll1, Jyll2, Jyll3,···,Jyll n

[0053] Among them, Lsgn1 is the first slurry flow data in the slurry flow data set, Jyll n is the last slurry flow data in the slurry flow data set, and n represents the number of data in the data set;

[0054] The expression of the flue gas volume flow data set YTj is:

[0055] YTj=Yqtj1, Yqtj2, Yqtj3,···,Yqtj n

[0056] Among them, Yqtj1 is the first flue gas volume flow data in the flue gas volume flow data set, yqtj n The last flue gas volume flow data in the flue gas volume flow data set, n represents the number of data in the data set;

[0057] The expression of the temperature data set NWj is:

[0058] NWj=Swsj1, Swsj2, Swsj3,···,Swsj n

[0059] Among them, Swsj1 is the first temperature data in the temperature data set, Swsj n is the last temperature data in the temperature data set, and n represents the number of data in the data set;

[0060] The expression of the oxidation air volume data set YFj is:

[0061] YFj=Yhfl1, Yhfl2, Yhfl3,···,Yhfl n

[0062] Among them, Yhfl1 is the first oxidation air volume data in the oxidation air volume data set, Yhfl n is the last oxidation air volume data in the oxidation air volume data set, and n represents the number of data in the data set;

[0063] The evaluation module evaluates the cleaning status according to the received parameter data, and sends a cleaning signal to the cleaning module through the network when the cleaning status is evaluated as needing cleaning;

[0064] The cleaning status assessment method is:

[0065] The evaluation module calculates the internal pollution degree Sbwr of the equipment based on the calcium sulfate concentration data set TSj, the slurry flow data set JLj, the flue gas volume flow data set YTj, the temperature data set NWj, and the oxidation air volume data set YFj;

[0066] The calculation formula of the internal pollution degree Sbwr of the equipment is:

[0067]

[0068] Among them, Lsgn i , Jyll i , Yqtj i 、Swsji , Yhfl i are the i-th data in the acid calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively. are the sum of the data from i=1 to i=n in the acid calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively; α, β, γ, δ, and ε are the corresponding weights of the acid calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively;

[0069] When the internal contamination degree Sbwr of the equipment is greater than the internal contamination threshold of the equipment, it is determined that the current equipment needs to be cleaned, and the evaluation module sends a cleaning signal to the cleaning module;

[0070] Equipment monitoring is performed through calcium sulfate concentration data sets, slurry flow data sets, flue gas volume flow data sets, temperature data sets, and oxidation air volume data sets. The internal contamination degree of the equipment is then calculated by combining the data sets. Cleaning is performed based on the internal contamination degree of the equipment. This can comprehensively evaluate the probability of blockage, wear, and pollutant adhesion inside the equipment, understand and grasp the working environment inside the equipment in real time, and perform automatic dynamic cleaning based on the calculation results. This can effectively prevent the occurrence of possible blockage and wear problems inside the equipment, extend the service life of the equipment, ensure that the oxidation reaction in the desulfurization process is fully carried out, maintain the material balance and reaction rate inside the system, and at the same time, dynamic cleaning can reduce the tediousness of manual cleaning, save labor, and improve the cleaning effect;

[0071] The cleaning module includes a cleaning unit, a cleaning monitoring unit and an automatic liquid storage unit. The cleaning unit is internally connected with a cleaning device. After receiving a cleaning signal, the cleaning device is turned on through network control to clean the equipment. The cleaning monitoring unit is internally connected with a liquid level monitor. The pre-storage amount Qxyc of the cleaning liquid is monitored through the liquid level monitor. When the pre-storage amount of the cleaning liquid is insufficient, a replenishment signal is sent to the automatic liquid storage unit. The automatic liquid storage unit replenishes the cleaning liquid. After cleaning, the cleaning module calculates the internal cleaning effect, determines whether manual intervention is required based on the cleaning effect, and sends an intervention signal to the manual intervention module when it is determined that manual intervention is required;

[0072] The calculation formula of the cleaning liquid pre-stock volume Qxyc is:

[0073] Qxyc=Qxyc s -Qxyc d

[0074] Among them, Qxyc s The real-time cleaning fluid inventory monitored by the liquid level monitor, Qxycd is the minimum pre-stock amount of the cleaning liquid. When the calculated result of the pre-stock amount of the cleaning liquid Qxyc is less than 0, it is determined that the current pre-stock amount of the cleaning liquid is insufficient;

[0075] By monitoring the pre-stock amount of cleaning liquid, it is determined whether the current pre-stock amount of cleaning liquid is sufficient to avoid the cleaning effect being affected by insufficient cleaning liquid, thus effectively ensuring the normal operation and operation effect of the equipment;

[0076] The calculation formula of cleaning effect Qxxg is:

[0077]

[0078] Among them, Lsgn s , Jyll s , Yqtj s 、Swsj s , Yhfl s They are the real-time calcium acid concentration data, slurry flow data, flue gas volume flow data, temperature data, oxidation air volume data after cleaning, Lsgn b , Jyll b ,yqtj b 、Swsj b , Yhfl b They are the acid calcium concentration data, slurry flow data, flue gas volume flow data, temperature data, and oxidation air volume data under standard conditions, and 5 is the 5 factors for evaluating the cleaning effect;

[0079] When the cleaning effect Qxxg is greater than the internal contamination threshold of the equipment, an intervention signal is sent to the manual intervention module;

[0080] By evaluating the cleaning effect and judging whether manual intervention is needed based on the evaluation results, the problem of incomplete cleaning that may exist in automatic cleaning is solved, and the working environment inside the equipment, the working efficiency and effect of the equipment are improved;

[0081] After receiving the intervention signal, the manual intervention module sends the intervention signal to the cleaning staff for manual deep cleaning.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas desulfurization control system for a large coal-fired power plant, characterized by: It includes a monitoring module, an evaluation module, a cleaning module and a manual intervention module. The monitoring module is used to monitor parameters inside the equipment and send the monitored parameters to the evaluation module through the network. The evaluation module evaluates the cleaning status according to the received parameter data. When the cleaning status is evaluated as needing cleaning, a cleaning signal is sent to the cleaning module through the network. The cleaning module receives the cleaning signal to clean the equipment and calculates the internal cleaning effect after cleaning. It determines whether manual intervention is needed according to the cleaning effect. If it is determined that manual intervention is needed, an intervention signal is sent to the manual intervention module. The monitoring module connects multiple monitors through a network to monitor the calcium sulfate concentration in the slurry, slurry flow, flue gas volume flow, internal temperature of the equipment, and oxidation air volume in real time, and numbers them to form a calcium sulfate concentration data set TSj, a slurry flow data set JLj, a flue gas volume flow data set YTj, a temperature data set NWj, and an oxidation air volume data set YFj; The cleaning module includes a cleaning unit, a cleaning monitoring unit and an automatic liquid storage unit. The cleaning unit is internally connected with a cleaning device. After receiving a cleaning signal, the cleaning device is controlled to start the equipment cleaning through the network. The cleaning monitoring unit is internally connected with a liquid level monitor. The pre-storage amount Qxyc of the cleaning liquid is monitored through the liquid level monitor. When the pre-storage amount of the cleaning liquid is insufficient, a replenishment signal is sent to the automatic liquid storage unit, and the automatic liquid storage unit replenishes the cleaning liquid. After receiving the intervention signal, the manual intervention module sends the intervention signal to the cleaning staff for manual deep cleaning.

2. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 1, characterized in that: The multiple monitors in the monitoring module include an online concentration meter, a flow meter, and a temperature sensor. The online concentration meter is used to monitor calcium sulfate concentration data, the flow meter is used to monitor slurry flow data, flue gas volume flow data, and oxidation air volume data, and the temperature sensor is used to monitor internal temperature data of the equipment.

3. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 2, characterized in that: The expression of the calcium sulfate concentration data set TSj is: TSj=Lsgn1、Lsgn2、Lsgn3、···、Lsgn n Among them, Lsgn1 is the first calcium sulfate concentration data in the calcium sulfate concentration data set, Lsgn n The last calcium sulfate concentration data in the calcium sulfate concentration data set, n represents the number of data in the data set; The expression of the slurry flow data set JLj is: JLj=Jyll1、Jyll2、Jyll3、···、Jyll n Among them, Lsgn1 is the first slurry flow data in the slurry flow data set, Jyll n is the last slurry flow data in the slurry flow data set, and n represents the number of data in the data set.

4. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 2, characterized in that: The expression of the flue gas volume flow data set YTj is: YTj=Yqtj1、Yqtj2、Yqtj3、···、Yqtj n Among them, Yqtj1 is the first flue gas volume flow data in the flue gas volume flow data set, yqtj n The last flue gas volume flow data in the flue gas volume flow data set, n represents the number of data in the data set; The expression of the temperature data set NWj is: NWj = Swsj1, Swsj2, Swsj3,···, Swsj n Among them, Swsj1 is the first temperature data in the temperature data set, Swsj n is the last temperature data in the temperature data set, and n represents the number of data in the data set; The expression of the oxidation air volume data set YFj is: YFj=Yhfl1、Yhfl2、Yhfl3、···、Yhfl n Among them, Yhfl1 is the first oxidation air volume data in the oxidation air volume data set, Yhfl n is the last oxidation air volume data in the oxidation air volume data set, and n represents the number of data in the data set.

5. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 4, characterized in that: The method for evaluating the cleaning status is: The evaluation module calculates the internal pollution degree Sbwr of the equipment according to the calcium sulfate concentration data set TSj, the slurry flow data set JLj, the flue gas volume flow data set YTj, the temperature data set NWj, and the oxidation air volume data set YFj.

6. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 5, characterized in that: The calculation formula of the internal pollution degree Sbwr of the equipment is: Among them, Lsgn i , Jyll i , Yqtj i 、Swsj i , Yhfl i are the i-th data in the acid calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively. They are the sum of the data from i=1 to i=n in the acid-calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively. α, β, γ, δ, and ε are the corresponding weights of the acid-calcium concentration data set, slurry flow data set, flue gas volume flow data set, temperature data set, and oxidation air volume data set, respectively.

7. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 6, characterized in that: The method for evaluating the cleaning status is: When the internal contamination degree Sbwr of the device is greater than the internal contamination threshold of the device, it is determined that the current device needs to be cleaned, and a cleaning signal is sent to the cleaning module.

8. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 7, characterized in that: The calculation formula of the cleaning effect Qxxg is: Among them, Lsgn s , Jyll s , Yqtj s 、Swsj s , Yhfl s They are the real-time calcium acid concentration data, slurry flow data, flue gas volume flow data, temperature data, oxidation air volume data after cleaning, Lsgn b , Jyll b , Yqtj b 、Swsj b , Yhfl b They are acid calcium concentration data, slurry flow data, flue gas volume flow data, temperature data, and oxidation air volume data under standard conditions, and 5 are the five factors for evaluating the cleaning effect.

9. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 8, characterized in that: When the cleaning effect Qxxg is greater than the internal pollution threshold of the equipment, an intervention signal is sent to the manual intervention module.

10. A large-scale coal-fired power plant flue gas desulfurization control system according to claim 9, characterized in that: The calculation formula of the cleaning liquid pre-storage amount Qxyc is: Qxyc=Qxyc s -Qxyc d Among them, Qxyc s The real-time cleaning fluid inventory monitored by the liquid level monitor, Qxyc d is the minimum pre-stock amount of the cleaning liquid. When the calculated result of the pre-stock amount of the cleaning liquid Qxyc is less than 0, it is determined that the current pre-stock amount of the cleaning liquid is insufficient.

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