Desulfurization absorption tower slurry supply control method and device, electronic equipment and storage medium

Abstract

The application discloses a slurry supply control method and device for a desulfurization absorption tower, an electronic device and a storage medium. The method and device are applied to the electronic device, specifically, double-parameter composite regulation is performed, limestone slurry supply closed-loop regulation is performed taking slurry pH value as a feedback quantity to generate a basic valve opening degree instruction, a deviation between a sulfur dioxide concentration at a clean flue gas outlet and a preset target concentration is taken to generate an opening degree correction quantity and is superimposed on the basic instruction to obtain a slurry supply regulating valve target opening degree; passivation working condition identification and disposal are performed, slurry pH and sulfur dioxide concentration change trends are comprehensively deduced based on multiple working condition operation parameters, when the slurry pH continuously exceeds a preset threshold value and presents a non-increasing trend and the sulfur dioxide concentration does not decrease with an increase in the slurry supply amount, it is determined that a limestone particle passivation working condition occurs, a passivation linkage disposal strategy is switched, that is, the slurry supply regulating valve opening degree is reduced and the oxidation fan output is increased, and the double-parameter composite regulation is restored after the pH fluctuation and the sulfur dioxide concentration decrease; hard limiting protection is performed, and the valve opening degree in normal state and in passivation disposal is limited in a safety interval corresponding to preset upper and lower limits of the pH. Through the above closed-loop adaptive control, the problems of manual operation difference and response lag are avoided, the limestone particle passivation working condition is automatically identified and eliminated, and therefore, long-term stable and economic operation of the desulfurization system can be ensured.

Description

Technical Field

[0001] This application relates to the field of flue gas desulfurization control technology for thermal power units, and more specifically, to a slurry supply control method, apparatus, electronic equipment, and storage medium for a desulfurization absorption tower. Background Technology

[0002] Limestone-gypsum wet flue gas desulfurization technology is currently the most widely used flue gas desulfurization process in domestic thermal power plants. Its basic principle is as follows: limestone powder is prepared into a slurry of a certain concentration and transported to the absorption tower via a slurry supply pipeline. There, it comes into countercurrent contact with the raw flue gas containing sulfur dioxide. Inside the tower, acid-base neutralization and oxidation reactions occur, generating calcium sulfite, which is further oxidized to calcium sulfate, thereby achieving the removal of sulfur dioxide from the flue gas.

[0003] In the operation and control of desulfurization systems, the pH value of the absorber slurry is a key process parameter characterizing the slurry's alkalinity and reactivity. The pH value directly determines the slurry's absorption efficiency of sulfur dioxide, the dissolution rate of limestone, and the crystallization quality of the reaction products. Based on this process characteristic, most power plant desulfurization systems in China currently employ a single closed-loop control strategy with the absorber slurry pH value as the sole feedback signal. This means that the control system calculates the opening command of the limestone slurry supply regulating valve in real time using proportional-integral calculations based on a pre-set pH target range. The linear adjustment of the valve opening controls the limestone slurry supply flow rate, thereby maintaining the slurry pH value within the target range.

[0004] However, the actual operating conditions of thermal power units are complex and variable. Frequent fluctuations in unit power generation load, unstable sulfur content in the coal fed into the furnace, and changes in instantaneous flue gas flow rate due to adjustments in boiler combustion conditions are persistent disturbances. These disturbances cause the sulfur load in the flue gas entering the absorption tower to be in a continuous dynamic state, significantly affecting the consumption rate of slurry alkalinity.

[0005] The pH value of the slurry is inherently a response parameter with high inertia and pure time lag. When operating conditions change, such as a sudden increase or decrease in the concentration of sulfur dioxide in the flue gas, the change in pH value exhibits a significant time delay, failing to reflect the current true sulfur load level in real time. In a closed-loop regulation mode relying solely on a single pH value, the control system can only detect changes in operating conditions after the pH value has deviated from the set range. The overall response chain is then lengthy, involving calculations by the regulator and actions by the actuators.

[0006] In a closed-loop control mode relying solely on a single pH value, excessive limestone addition under low sulfur load conditions leads to absorbent surface passivation. Specifically, under low flue gas sulfur load conditions, the control system, operating within the pre-set pH range, continuously adds excessive amounts of limestone slurry. Since the actual required alkalinity consumption is lower than the slurry supply, the excess limestone solid particles cannot participate in the reaction in time and are instead coated by reaction products, primarily calcium sulfate and calcium sulfite, forming a dense coating layer on the limestone particle surface. Once limestone particles undergo surface passivation, their effective specific surface area decreases significantly, and the dissolution rate drops sharply, resulting in a significant reduction in the overall reactivity of the slurry within the tower. This passivation phenomenon further induces a series of problems, including slurry poisoning, deterioration of gypsum crystal quality, difficulty in dehydration, and enrichment of impurities within the absorption tower. These problems not only cause significant ineffective loss of limestone powder and increase the operating costs of the desulfurization system, but also seriously affect the long-term stable operation of the desulfurization system.

[0007] To address the aforementioned issues, current conventional methods at power plants rely entirely on operators' experience to manually intervene by adjusting operating parameters such as pH setpoints or slurry valve opening offsets in the DCS system. However, significant differences in operating habits and judgment standards among operators lead to poor operational consistency. Furthermore, under conditions of frequent load changes in the unit, manual response speed is far from meeting the demands of real-time control, thus failing to completely prevent surface passivation of the absorbent. Summary of the Invention

[0008] In view of this, this application provides a slurry supply control method, apparatus, electronic equipment and storage medium for a desulfurization absorption tower, which solves the problem that existing manual modification of operating parameters cannot completely avoid the passivation of the absorbent surface.

[0009] To achieve the above objectives, the following solution is proposed:

[0010] A slurry supply control method for a desulfurization absorption tower, applied to electronic equipment, wherein the desulfurization absorption tower is used to introduce limestone slurry to remove sulfur dioxide from flue gas, and the slurry supply control method includes the following steps:

[0011] Perform dual-parameter composite regulation: Obtain the pH value of the slurry in the desulfurization absorption tower and the sulfur dioxide concentration at the clean flue gas outlet; use the slurry pH value as feedback to perform closed-loop regulation of limestone slurry supply and generate a basic valve opening command; use the deviation between the sulfur dioxide concentration and the preset target concentration as input to generate an opening correction value; add the opening correction value to the basic valve opening command to obtain the target opening of the slurry supply regulating valve, and output the target opening to the slurry supply regulating valve to control the supply flow rate of limestone slurry;

[0012] Passivation condition identification and handling: During the execution of the dual-parameter composite regulation, based on the real-time acquired multi-condition operating parameters, the pH change trend of the slurry corresponding to the current slurry supply and the sulfur dioxide concentration change trend are comprehensively deduced; when the slurry pH is continuously higher than the preset threshold and the pH change trend is non-increasing, and at the same time the sulfur dioxide concentration does not decrease with the increase of limestone slurry supply flow, it is determined that limestone particle passivation condition has occurred, and the slurry supply control strategy is switched from the dual-parameter composite regulation to the passivation linkage handling strategy. The passivation linkage handling strategy is: reducing the opening of the slurry supply regulating valve to reduce the limestone slurry supply flow, while increasing the output of the desulfurization absorption tower oxidation fan; continuously monitoring the multi-condition operating parameters until the slurry pH value is detected to fluctuate and the sulfur dioxide concentration begins to decrease, it is determined that the passivation condition has been resolved, and the dual-parameter composite regulation is resumed;

[0013] Implement hard limit protection: The target opening degree and the opening degree of the slurry regulating valve when the passivation linkage treatment strategy is implemented are both limited to a preset safe range, and the upper and lower limits of the safe range correspond to the valve opening values ​​corresponding to the preset upper and lower limits of the slurry pH value.

[0014] Optionally, in the execution of the dual-parameter composite adjustment, the deviation between the sulfur dioxide concentration and the preset target concentration is used as input to generate the opening correction amount, including:

[0015] The correction coefficient is obtained by dividing the difference between the measured value of sulfur dioxide concentration and the preset target concentration by the adjustment coefficient.

[0016] The correction factor is added to the base valve opening command.

[0017] Optionally, the multi-condition operating parameters include some or all of the following: unit load, flue gas volumetric flow rate, raw flue gas sulfur dioxide concentration, oxygen content, real-time desulfurization efficiency, limestone slurry density, and gas-liquid ratio.

[0018] Optionally, in the process of identifying and handling passivation conditions, determining the presence of limestone particle passivation conditions includes:

[0019] When the pH of the slurry remains above 5.5, and the pH trend does not increase over multiple consecutive sampling periods, and the sulfur dioxide concentration no longer decreases with the increase of limestone slurry supply, it is determined that limestone particle passivation has occurred.

[0020] Optionally, in the passivation linkage treatment strategy, reducing the opening of the slurry supply regulating valve includes the following steps:

[0021] Reduce the opening of the slurry supply regulating valve by 15% to 20%.

[0022] Optionally, in the implementation of hard limit protection, the upper limit of the preset upper and lower limit range of the slurry pH value is 5.8 and the lower limit is 4.8.

[0023] Optionally, in the execution of the dual-parameter composite regulation, the limestone slurry supply closed-loop regulation executed with the slurry pH value as the feedback quantity is a proportional-integral regulation.

[0024] A slurry supply control device for a desulfurization absorption tower, applied in electronic equipment, wherein the desulfurization absorption tower is used to introduce limestone slurry to remove sulfur dioxide from flue gas, and the slurry supply control device includes:

[0025] The composite regulation module is configured to perform dual-parameter composite regulation: acquiring the pH value of the slurry in the desulfurization absorption tower and the sulfur dioxide concentration at the clean flue gas outlet; using the slurry pH value as feedback to perform closed-loop regulation of limestone slurry supply and generate a basic valve opening command; using the deviation between the sulfur dioxide concentration and a preset target concentration as input to generate an opening correction value; superimposing the opening correction value onto the basic valve opening command to obtain the target opening of the slurry supply regulating valve, and outputting the target opening to the slurry supply regulating valve to control the supply flow rate of limestone slurry;

[0026] The passivation identification and handling module is configured to perform passivation condition identification and handling: during the execution of the dual-parameter composite regulation, based on the real-time acquired multi-condition operating parameters, it comprehensively deduces the pH change trend of the slurry corresponding to the current slurry supply and the sulfur dioxide concentration change trend; when the slurry pH is continuously higher than the preset threshold and the slurry pH change trend is non-increasing, and at the same time the sulfur dioxide concentration does not decrease with the increase of limestone slurry supply flow, it is determined that limestone particle passivation condition has occurred, and the slurry supply control strategy is switched from the dual-parameter composite regulation to the passivation linkage handling strategy. The passivation linkage handling strategy is: reducing the opening of the slurry supply regulating valve to reduce the limestone slurry supply flow, while increasing the output of the desulfurization absorption tower oxidation fan; continuously monitoring the multi-condition operating parameters until the slurry pH value is detected to fluctuate and the sulfur dioxide concentration begins to decrease, it is determined that the passivation condition has been resolved, and the dual-parameter composite regulation is resumed.

[0027] The amplitude limiting protection module is configured to perform hard amplitude limiting protection: limiting the target opening degree and the opening degree of the slurry regulating valve when the passivation linkage treatment strategy is executed to a preset safety range, and the upper and lower limits of the safety range correspond to the valve opening values ​​corresponding to the preset upper and lower limits of the slurry pH value.

[0028] An electronic device is applied to a desulfurization absorption tower, the electronic device comprising at least one processor and a memory connected to the processor, wherein:

[0029] The memory is used to store computer programs or instructions;

[0030] The processor is used to execute the computer program or instructions to enable the electronic device to implement the slurry supply control method as described above.

[0031] A computer-readable storage medium is applied to an electronic device, the storage medium carrying one or more computer programs that can be executed by the electronic device to enable the electronic device to implement the slurry supply control method as described above.

[0032] As can be seen from the above technical solution, this application discloses a slurry supply control method, device, electronic equipment, and storage medium for a desulfurization absorption tower. The method and device are applied to the electronic equipment, specifically performing dual-parameter composite regulation. The slurry pH value is used as a feedback quantity to execute limestone slurry supply closed-loop regulation to generate a basic valve opening command. At the same time, the deviation between the sulfur dioxide concentration at the clean flue gas outlet and the preset target concentration is used to generate an opening correction quantity and superimposed on the basic command to obtain the target opening of the slurry supply regulating valve. Passivation condition identification and handling are performed. Based on the comprehensive deduction of the slurry pH and sulfur dioxide concentration change trends based on multiple operating parameters, when the slurry pH is continuously higher than the preset threshold and shows a non-increasing trend, and the sulfur dioxide concentration does not decrease with the increase of slurry supply, it is determined that limestone particle passivation condition has occurred, and the passivation linkage handling strategy is switched to—reducing the opening of the slurry supply regulating valve and increasing the output of the oxidation fan until the pH fluctuates and the sulfur dioxide concentration decreases, after which the dual-parameter composite regulation is restored. Hard limit protection is performed to limit the valve opening during normal operation and passivation handling to a safe range corresponding to the preset upper and lower limits of pH. The closed-loop adaptive control described above avoids the problems of manual operation differences and response lag, automatically identifies and eliminates limestone particle passivation conditions, thereby ensuring the long-term stable and economical operation of the desulfurization system. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating a slurry supply control method for a desulfurization absorption tower according to an embodiment of this application;

[0035] Figure 2This is a block diagram of a slurry supply control device for a desulfurization absorption tower according to an embodiment of this application;

[0036] Figure 3 This is a block diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] The slurry supply control scheme provided in this application is based on the distributed control system (DCS) of the desulfurization absorption tower. The desulfurization absorption tower is used to introduce limestone slurry to remove sulfur dioxide from the flue gas. Its supporting hardware architecture includes a multi-condition parameter acquisition module, a DCS logic processing unit, a slurry flow regulating valve actuator, an oxidation fan frequency converter, and various field sensors and transmitters.

[0039] The multi-condition parameter acquisition module is used to collect various operating parameters that reflect the operating status of the absorption tower in real time. Specifically, it includes a raw flue gas flow meter for collecting flue gas volume flow rate, a raw flue gas sulfur dioxide analyzer for collecting raw flue gas sulfur dioxide concentration, an oxygen analyzer, a clean flue gas sulfur dioxide analyzer for obtaining the clean flue gas outlet sulfur dioxide concentration, a limestone slurry density meter, an absorption tower slurry pH transmitter, and a slurry supply flow meter for monitoring the actual slurry supply flow rate.

[0040] The DCS logic unit, serving as the control core, incorporates a dual-parameter composite adjustment and calculation module, a passivation condition identification and handling subroutine, and hard-limit protection logic. The DCS logic unit receives all field signals output from the aforementioned multi-condition parameter acquisition module, processes them using its built-in algorithm, and outputs two control commands.

[0041] The slurry flow regulating valve actuator, also known as the slurry supply regulating valve, is installed on the limestone slurry supply pipeline. It receives the valve position opening command output by the DCS logic unit and controls the supply flow of limestone slurry by adjusting its own opening.

[0042] The oxidation fan frequency conversion control unit is used to drive the oxidation fan of the desulfurization absorption tower, receive the frequency adjustment command output by the DCS logic operation unit, and adjust the oxidation air volume in the tower by changing the operating frequency of the oxidation fan.

[0043] Various field sensors and transmitters, including but not limited to the pH transmitter, flue gas sulfur dioxide analyzer, flow meter, and density meter mentioned above, are used to convert field process parameters into standard electrical signals and transmit them to the DCS logic unit.

[0044] All kinds of field-acquired signals are connected to the DCS computing unit. Through the built-in linkage algorithm, two control commands are output respectively. One command is output to the slurry regulating valve actuator, and the other command is output to the oxidation blower frequency conversion regulating unit. These commands control the slurry regulating valve and the oxidation air supply system respectively, thus completing fully automatic closed-loop adaptive regulation.

[0045] Based on the above hardware, in order to solve the existing technical problems of desulfurization absorption towers, the following specific technical solutions are proposed.

[0046] Figure 1 This is a flowchart illustrating a slurry supply control method for a desulfurization absorption tower according to an embodiment of this application.

[0047] like Figure 1 As shown, the slurry supply control method for the desulfurization absorption tower provided in this embodiment is applied to an electronic device used to control the desulfurization absorption tower, and is used to control the supply of lime slurry to the desulfurization absorption tower to completely avoid passivation of the absorbent surface. This electronic device can be understood as a computer, server, embedded device, or cloud platform with data computing and information processing capabilities. The slurry supply control method specifically includes the following steps:

[0048] S1. Implement dual-parameter composite regulation for the desulfurization absorption tower.

[0049] In the existing lime slurry supply control system of the desulfurization absorption tower, the pH value of the slurry in the absorption tower is used as the basic feedback quantity to perform closed-loop regulation of limestone slurry supply. The closed-loop regulation adopts a proportional-integral (PI) regulation method. Specifically, the real-time measured value of the slurry pH is compared with the preset pH setpoint to obtain the pH deviation value, which is input to the PI controller. The PI controller performs calculations based on the proportional gain Kp and the integral time constant Ti, and outputs a basic valve opening command. The basic valve opening command represents the opening degree of the slurry supply regulating valve required to maintain the slurry pH value within the target range, without considering the deviation of the outlet sulfur dioxide concentration.

[0050] This application introduces sulfur dioxide concentration feedback based on the above. That is, while retaining the original pH closed-loop regulation, it introduces the sulfur dioxide concentration at the clean flue gas outlet as a second feedback parameter. The control target value for sulfur dioxide at the clean flue gas outlet is pre-calibrated according to different power generation load ranges of the unit, i.e., the preset target concentration. For example, in the 50% load range of the unit, the corresponding preset target concentration for sulfur dioxide is calibrated to one value; in the 75% load range, it is calibrated to another value; and in the 100% load range, it is calibrated to yet another value. The calibration of the preset target concentration is based on the unit's historical operating data and environmental emission limits.

[0051] The measured sulfur dioxide concentration from the sulfur dioxide analyzer installed at the chimney inlet of the CEMS (Continuous Online Monitoring System) is collected in real time. The measured sulfur dioxide concentration is compared with the preset target concentration corresponding to the current load range to obtain the deviation value.

[0052] Based on this, the deviation between the measured sulfur dioxide concentration and the preset target concentration is used as the input to generate the opening correction amount. Specifically, a correction coefficient K is calculated according to the following formula:

[0053] K = (Measured sulfur dioxide concentration - Preset target concentration) / Tuning coefficient

[0054] The preferred tuning factor is 50. The physical meaning of the correction factor K is as follows: when the measured sulfur dioxide concentration is higher than the preset target concentration, K is positive, indicating that the slurry supply needs to be increased to reduce emissions; when the measured sulfur dioxide concentration is lower than the preset target concentration, K is negative, indicating that the slurry supply needs to be reduced to avoid excessive addition of absorbent.

[0055] Based on the obtained correction coefficient K, it is superimposed onto the basic valve opening command to obtain the target opening of the slurry supply regulating valve. The superposition operation is an algebraic addition operation, i.e.:

[0056] Target valve opening = base valve opening command + K,

[0057] The target opening degree is output to the slurry regulating valve actuator to control the supply flow rate of limestone slurry.

[0058] Through the aforementioned dual-parameter composite regulation, when the sulfur content of the raw flue gas suddenly increases and the sulfur dioxide concentration in the clean flue gas shows an upward trend, even if the pH value of the slurry has not yet changed significantly due to subsequent factors, the sulfur dioxide concentration feedback loop can respond quickly. By generating a positive correction coefficient K, it promptly increases the opening of the slurry supply regulating valve, thereby increasing the limestone slurry supply in advance and preventing instantaneous exceedance of sulfur dioxide in the clean flue gas. Conversely, when the flue gas sulfur load is low and the measured sulfur dioxide concentration is lower than the preset target concentration, the negative correction coefficient K actively closes the valve, reducing the slurry dosage and preventing excessive absorption agent injection from the source.

[0059] S2. Perform passivation condition identification and handling on the desulfurization absorption tower.

[0060] While performing dual-parameter composite regulation, the system acquires multi-condition operating parameters that reflect the operating status of the desulfurization absorption tower in real time. These parameters include unit load, flue gas volume flow rate, raw flue gas sulfur dioxide concentration, oxygen content, real-time desulfurization efficiency, limestone slurry density, and some or all of the gas-liquid ratio.

[0061] Based on the comprehensive deduction of operating parameters under multiple operating conditions, the trends of slurry pH and sulfur dioxide concentration corresponding to the current slurry supply are analyzed. The specific implementation method of trend deduction can be the moving average slope method: the slurry pH value and sulfur dioxide concentration in the most recent N sampling periods are processed by moving average, and the slope of each is calculated. The slope of the change is used to represent the current trend.

[0062] The comprehensive simulation further includes: calculating the sulfur load on the flue gas side from the original flue gas sulfur dioxide concentration and flue gas volume flow rate to determine the rate of alkalinity consumption in the slurry inside the tower; converting the slurry concentration into limestone slurry density to calculate the total amount of absorbent fed into the tower per unit time; using the oxidation oxygen content to correct and compensate for the actual dissolution efficiency of limestone; and comparing the alkalinity replenishment rate with the consumption rate to predict the future trend of slurry pH.

[0063] Limestone particle passivation is determined to occur when all three of the following conditions are met simultaneously:

[0064] Condition 1: The pH of the absorber slurry remains above a preset threshold. Preferably, the preset threshold is 5.5.

[0065] Condition 2: The pH change trend of the slurry is non-increasing. That is, within the trend judgment period, the slope of the pH change of the slurry is less than or equal to zero, indicating that the pH of the slurry has not increased. Preferably, the trend judgment period is multiple consecutive sampling periods, specifically 10 to 20 seconds.

[0066] Condition 3: The sulfur dioxide concentration does not decrease with the increase of limestone slurry supply flow rate. That is, even if the slurry supply is sufficient, i.e. the opening of the slurry supply regulating valve is at a large value or continues to increase, the sulfur dioxide concentration at the clean flue gas outlet does not show a decreasing trend, but instead remains unchanged or continues to rise.

[0067] The simultaneous fulfillment of the above three conditions indicates an abnormal operating condition where limestone particles are encapsulated by reaction products and their surfaces become passivated within the desulfurization absorption tower. In this case, simply increasing the slurry supply will not improve desulfurization efficiency; instead, it will exacerbate the ineffective loss of limestone.

[0068] When limestone particle passivation is detected, the slurry supply control strategy is switched from dual-parameter composite adjustment to a passivation linkage treatment strategy. The switching action is automatically executed by the DCS logic unit without manual intervention.

[0069] The passivation linkage strategy includes two parallel control actions:

[0070] The first control action is to reduce the opening of the slurry supply regulating valve to decrease the supply flow rate of limestone slurry. Preferably, the opening of the slurry supply regulating valve is reduced by 15% to 20%. The purpose of reducing the slurry supply is to reduce the continuous addition of excessive limestone and prevent unreacted limestone from being further coated by the product.

[0071] The second adjustment action is to simultaneously increase the output of the oxidation fan in the desulfurization absorption tower to enhance the agitation and oxidation intensity of the slurry within the tower. Preferably, the operating frequency of the oxidation fan is increased by 8% to 12%. Increasing the oxidation air volume can enhance the mixing effect of the slurry within the tower, increase the intensity of the oxidation reaction, and help break through the coating layer on the surface of limestone particles, restoring the effective dissolution area of ​​the limestone.

[0072] During the implementation of the passivation linkage treatment strategy, the multi-condition operating parameters are continuously monitored, and the changes in slurry pH and sulfur dioxide concentration are tracked in real time until the following two recovery conditions are simultaneously met:

[0073] Recovery condition 1: Fluctuation in slurry pH. That is, the pH trend of the slurry changes from stable to fluctuating, indicating that the coating layer on the surface of limestone particles has been partially broken, the limestone has begun to dissolve effectively again, and the alkalinity of the slurry shows dynamic changes.

[0074] Recovery condition two: Sulfur dioxide concentration begins to decrease. That is, the sulfur dioxide concentration at the clean flue gas outlet shows a downward trend, indicating that the desulfurization efficiency has been restored and the limestone slurry has resumed its effective desulfurization function.

[0075] When the above two recovery conditions are met simultaneously, it is determined that the passivation condition has been resolved. The DCS logic unit will restore the slurry supply control strategy from the passivation linkage treatment strategy to the execution of dual-parameter composite regulation, and gradually restore the normal slurry supply.

[0076] S3. Implement hard amplitude limiting protection measures under any operating condition.

[0077] That is, whether it is the target opening degree of the dual-parameter composite regulation output or the opening degree of the slurry regulating valve when the passivation linkage treatment strategy is implemented, it must be output to the slurry regulating valve actuator after being protected by hard limit.

[0078] Hard limiting protection includes the following two aspects:

[0079] First level: Valve opening safety range limitation. The opening of the slurry supply regulating valve is limited to a preset safety range. The upper and lower limits of the safety range are preset based on the operating safety requirements and equipment characteristics of the absorption tower to avoid extreme actions such as fully opening or closing the valve, and to prevent violent fluctuations in the internal reaction conditions of the absorption tower.

[0080] The second level: Limiting the upper and lower limits of slurry pH. The slurry pH is limited to a preset upper and lower limit range. Preferably, the upper limit of the slurry pH is 5.8, and the lower limit is 4.8. The upper and lower limits of the safe range correspond to the valve opening values ​​corresponding to the preset upper and lower limits of the slurry pH. That is, when the valve opening command obtained from the dual-parameter composite adjustment or passivation linkage processing exceeds the safe range, it is forced to output the boundary value of the safe range; when the measured slurry pH value approaches 5.8 or 4.8, the hard-limit protection logic intervenes to limit the valve action range, ensuring that the acid-base conditions inside the tower are maintained within a safe range.

[0081] The aforementioned hard limit protection ensures the safe operation of the entire desulfurization system under all operating conditions, preventing system loss of control due to abnormal control algorithms or drastic changes in operating conditions.

[0082] As can be seen from the above technical solutions, the present application provides a slurry supply control method for a desulfurization absorption tower, which is applied to electronic equipment, specifically implementing dual-parameter composite regulation: taking the slurry pH value as the feedback quantity to perform closed-loop regulation of limestone slurry supply to generate a basic valve opening command, and at the same time generating an opening correction quantity based on the deviation between the sulfur dioxide concentration at the clean flue gas outlet and the preset target concentration, and superimposing the correction quantity on the basic command to obtain the target opening of the slurry supply regulating valve; performing passivation condition identification and disposal, comprehensively deducing the change trend of slurry pH and sulfur dioxide concentration based on multi-condition operation parameters, when the slurry pH continues to be higher than the preset threshold and shows a non-rising trend, and the sulfur dioxide concentration does not decrease with the increase of slurry supply amount, it is determined that a limestone particle passivation condition occurs, and the operation is switched to a passivation linkage disposal strategy — reducing the opening of the slurry supply regulating valve and increasing the output of the oxidation fan, until the pH fluctuates and the sulfur dioxide concentration decreases, then the dual-parameter composite regulation is restored; performing hard limiting protection, so that the valve opening during normal operation and passivation disposal is limited to the safety range corresponding to the preset upper and lower limits of pH. Through the above closed-loop adaptive control, the problems of manual operation differences and response lag are avoided, the limestone particle passivation condition is automatically identified and eliminated, thereby ensuring the long-term stable and economical operation of the desulfurization system.

[0083] The present application further provides the following specific examples based on the above technical content:

[0084] The limestone-gypsum wet desulfurization devices supporting 2 sets of 330MW units in a thermal power plant are selected, and the control program described in the present invention is embedded in the original distributed control system of the units, and the specific implementation steps are as follows:

[0085] Step 1: Retrieve the historical operation data of the units in the past year, and calibrate the control expected value (preset target concentration) of sulfur dioxide at the clean flue gas outlet under corresponding working conditions according to different power generation load ranges such as 50%, 75% and 100% of the units. The value 50 is fixed as the deviation tuning coefficient and written into the DCS operation program. The real-time sulfur dioxide data of the CEMS analyzer at the stack inlet is read in real time, the correction coefficient is calculated in real time according to the formula K=(measured value−target value) / 50, and superimposed on the valve position command generated by the original pH closed-loop PI regulation.

[0086] Step Two: A passivation condition judgment subroutine is built within the DCS program, connecting signals from the absorber's pH transmitter, limestone slurry density measuring point, raw flue gas flow meter, oxygen analyzer, and raw flue gas sulfur dioxide analyzer. The system periodically collects data from on-site measuring points such as raw flue gas flow rate, inlet sulfur dioxide concentration, actual slurry supply flow rate, limestone slurry density, and oxidation oxygen content. The rate of alkalinity consumption in the slurry within the tower is determined by the sulfur load on the flue gas side. The slurry concentration is calculated based on the limestone slurry density, and the actual limestone dissolution efficiency is corrected and compensated using the oxidation oxygen content. The alkalinity replenishment rate is compared with the consumption rate to predict the pH trend. The pH passivation judgment threshold is set to 5.5, and the trend judgment period is 10 to 20 seconds. Once the system determines that limestone passivation has occurred, the program command reduces the opening of the slurry supply regulating valve by 15% to 20% and simultaneously increases the operating frequency of the oxidation fan by 8% to 12%, enhancing the stirring and oxidation effect of the slurry within the tower. Continuous monitoring was conducted until the pH of the slurry fluctuated and the sulfur dioxide concentration began to decrease, at which point normal dual-parameter compound adjustment was resumed.

[0087] Step 3: Add hard protection limits, setting an upper limit of 5.8 and a lower limit of 4.8 for the pH of the absorber slurry. All valve commands after algorithm correction must not exceed the valve opening range corresponding to these values ​​to prevent sudden changes in acid-base conditions within the tower.

[0088] Operational results show that after applying this invention, the stability of flue gas sulfur dioxide control is significantly improved, and the risk of instantaneous exceedance is basically eliminated; the overall consumption of limestone powder can be significantly reduced, and the operating cost of the desulfurization system is greatly reduced; fully adaptive unmanned regulation is realized, and the control stability of the unit under disturbances such as variable load and coal quality fluctuations is greatly improved, effectively reducing the monitoring and operation intensity of operators.

[0089] Although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous.

[0090] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0091] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including but not limited to object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer.

[0092] Figure 2 This is a block diagram of a slurry supply control device for a desulfurization absorption tower according to an embodiment of this application.

[0093] like Figure 2 As shown, the slurry supply control device for the desulfurization absorption tower provided in this embodiment is applied to an electronic device used to control the desulfurization absorption tower. It controls the supply of lime slurry to the desulfurization absorption tower to completely prevent passivation of the absorbent surface. This electronic device can be understood as a computer, server, embedded device, or cloud platform with data computing and information processing capabilities. Specifically, the slurry supply control device includes a composite adjustment module 10, a passivation identification and treatment module 20, and a limiting protection module 30.

[0094] The composite regulation module is used to perform dual-parameter composite regulation of the desulfurization absorption tower.

[0095] In the existing lime slurry supply control system of the desulfurization absorption tower, the pH value of the slurry in the absorption tower is used as the basic feedback quantity to perform closed-loop regulation of limestone slurry supply. The closed-loop regulation adopts a proportional-integral (PI) regulation method. Specifically, the real-time measured value of the slurry pH is compared with the preset pH setpoint to obtain the pH deviation value, which is input to the PI controller. The PI controller performs calculations based on the proportional gain Kp and the integral time constant Ti, and outputs a basic valve opening command. The basic valve opening command represents the opening degree of the slurry supply regulating valve required to maintain the slurry pH value within the target range, without considering the deviation of the outlet sulfur dioxide concentration.

[0096] This application introduces sulfur dioxide concentration feedback based on the above. That is, while retaining the original pH closed-loop regulation, the composite regulation module introduces the sulfur dioxide concentration at the clean flue gas outlet as a second feedback parameter. The control target value for sulfur dioxide at the clean flue gas outlet is pre-calibrated according to different power generation load ranges of the unit, i.e., the preset target concentration. For example, in the 50% load range of the unit, the corresponding preset target concentration for sulfur dioxide is calibrated to one value; in the 75% load range, it is calibrated to another value; and in the 100% load range, it is calibrated to yet another value. The calibration of the preset target concentration is based on the unit's historical operating data and environmental emission limits. The specific execution process of this module has been described in detail above and will not be repeated here.

[0097] The passivation identification and handling module is used to identify and handle the passivation conditions of the desulfurization absorption tower.

[0098] While performing dual-parameter composite regulation, multi-condition operating parameters reflecting the operating status of the desulfurization absorption tower are acquired in real time. These parameters include unit load, flue gas volumetric flow rate, raw flue gas sulfur dioxide concentration, oxygen content, real-time desulfurization efficiency, limestone slurry density, and some or all of the gas-liquid ratio. The specific execution process has been described in detail above and will not be repeated here.

[0099] The amplitude limiting protection module is used to perform hard amplitude limiting protection under any operating condition.

[0100] That is, whether it is the target opening degree of the dual-parameter composite regulation output or the opening degree of the slurry regulating valve when the passivation linkage treatment strategy is implemented, it must be output to the slurry regulating valve actuator after being protected by hard limit.

[0101] Hard limiting protection has been explained in detail above, so it will not be repeated here.

[0102] As can be seen from the above technical solution, this application provides a slurry supply control device for a desulfurization absorption tower. This device is applied to electronic equipment and is specifically used to perform dual-parameter composite regulation. It uses the slurry pH value as feedback to execute limestone slurry supply closed-loop regulation to generate a basic valve opening command. At the same time, it generates an opening correction amount based on the deviation between the sulfur dioxide concentration at the clean flue gas outlet and the preset target concentration, and adds it to the basic command to obtain the target opening of the slurry supply regulating valve. It performs passivation condition identification and handling. Based on the comprehensive deduction of the change trend of slurry pH and sulfur dioxide concentration based on multiple operating parameters, when the slurry pH is continuously higher than the preset threshold and shows a non-increasing trend, and the sulfur dioxide concentration does not decrease with the increase of slurry supply, it is determined that limestone particle passivation condition has occurred, and the passivation linkage handling strategy is switched to—reducing the opening of the slurry supply regulating valve and increasing the output of the oxidation fan until the pH fluctuates and the sulfur dioxide concentration decreases, and then the dual-parameter composite regulation is restored. It performs hard limit protection to limit the valve opening during normal operation and passivation handling to a safe range corresponding to the preset upper and lower limits of pH. Through the aforementioned closed-loop adaptive control, the problems of human operation differences and response lag are avoided, and the passivation of limestone particles is automatically identified and eliminated, thereby ensuring the long-term stable and economical operation of the desulfurization system.

[0103] The units described in the embodiments of this disclosure can be implemented in software or in hardware. The name of a unit does not necessarily limit the unit itself; for example, the first acquisition unit can also be described as "a unit that acquires at least two Internet Protocol addresses".

[0104] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), complex programmable logic devices (CPLDs), and so on.

[0105] Figure 3 This is a block diagram of an electronic device according to an embodiment of this application.

[0106] The following is for reference. Figure 3 This document illustrates a structural diagram suitable for implementing the electronic device in the embodiments of this disclosure. The terminal device in the embodiments of this disclosure may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. This electronic device is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this disclosure.

[0107] The electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 301, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 302 or a program loaded from an input device 306 into a random access memory (RAM) 303. The RAM also stores various programs and data required for the operation of the electronic device. The processing unit, ROM, and RAM are interconnected via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0108] Typically, the following devices can be connected to the I / O interface: input devices including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 307 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 308 including, for example, magnetic tapes, hard disks, etc.; and communication devices 309. Communication device 309 allows the electronic device to communicate wirelessly or wiredly with other devices to exchange data. Although electronic devices with various devices are shown in the figures, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively.

[0109] This application also provides an embodiment of a computer-readable storage medium.

[0110] The aforementioned computer-readable storage medium is applied to an electronic device and carries one or more computer programs. When the electronic device executes one or more of these computer programs, it causes the electronic device to perform dual-parameter composite regulation. It uses the slurry pH value as feedback to execute a closed-loop regulation of limestone slurry supply, generating a basic valve opening command. Simultaneously, it generates an opening correction amount based on the deviation between the sulfur dioxide concentration at the clean flue gas outlet and a preset target concentration, and adds this correction to the basic command to obtain the target opening of the slurry supply regulating valve. It then performs passivation condition identification and handling, comprehensively extrapolating the trends of slurry pH and sulfur dioxide concentration changes based on multiple operating parameters. When the slurry pH remains above a preset threshold and shows no upward trend, while the sulfur dioxide concentration does not decrease with increasing slurry supply, it determines that limestone particle passivation has occurred and switches to a passivation linkage handling strategy—reducing the slurry supply regulating valve opening and increasing the output of the oxidation blower until the pH fluctuates and the sulfur dioxide concentration decreases, at which point it resumes dual-parameter composite regulation. Finally, it performs hard-limit protection, restricting the valve opening during both normal operation and passivation handling to a safe range corresponding to the preset upper and lower limits of pH. Through the aforementioned closed-loop adaptive control, the problems of human operation differences and response lag are avoided, and the passivation of limestone particles is automatically identified and eliminated, thereby ensuring the long-term stable and economical operation of the desulfurization system.

[0111] It should be noted that the computer-readable medium described above in this disclosure can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0112] In this disclosure, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0113] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0114] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0115] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0116] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

Claims

1. A method for controlling the slurry supply of a desulfurization absorption tower, applied to electronic equipment, wherein the desulfurization absorption tower is used to introduce limestone slurry to remove sulfur dioxide from flue gas, characterized in that, The slurry supply control method includes the following steps: Perform dual-parameter composite regulation: Obtain the pH value of the slurry in the desulfurization absorption tower and the sulfur dioxide concentration at the clean flue gas outlet; use the slurry pH value as feedback to perform closed-loop regulation of limestone slurry supply and generate a basic valve opening command; use the deviation between the sulfur dioxide concentration and the preset target concentration as input to generate an opening correction value; add the opening correction value to the basic valve opening command to obtain the target opening of the slurry supply regulating valve, and output the target opening to the slurry supply regulating valve to control the supply flow rate of limestone slurry; Passivation condition identification and handling: During the execution of the dual-parameter composite regulation, based on the real-time acquired multi-condition operating parameters, the pH change trend of the slurry corresponding to the current slurry supply and the sulfur dioxide concentration change trend are comprehensively deduced; when the slurry pH is continuously higher than the preset threshold and the pH change trend is non-increasing, and at the same time the sulfur dioxide concentration does not decrease with the increase of limestone slurry supply flow, it is determined that limestone particle passivation condition has occurred, and the slurry supply control strategy is switched from the dual-parameter composite regulation to the passivation linkage handling strategy. The passivation linkage handling strategy is: reducing the opening of the slurry supply regulating valve to reduce the limestone slurry supply flow, while increasing the output of the desulfurization absorption tower oxidation fan; continuously monitoring the multi-condition operating parameters until the slurry pH value is detected to fluctuate and the sulfur dioxide concentration begins to decrease, it is determined that the passivation condition has been resolved, and the dual-parameter composite regulation is resumed; Implement hard limit protection: The target opening degree and the opening degree of the slurry regulating valve when the passivation linkage treatment strategy is implemented are both limited to a preset safe range, and the upper and lower limits of the safe range correspond to the valve opening values ​​corresponding to the preset upper and lower limits of the slurry pH value.

2. The slurry supply control method as described in claim 1, characterized in that, In the execution of the dual-parameter composite adjustment, the deviation between the sulfur dioxide concentration and the preset target concentration is used as input to generate the opening correction amount, including: The correction coefficient is obtained by dividing the difference between the measured value of sulfur dioxide concentration and the preset target concentration by the adjustment coefficient. The correction factor is added to the base valve opening command.

3. The slurry supply control method as described in claim 1, characterized in that, The multi-condition operating parameters include some or all of the following: unit load, flue gas volumetric flow rate, raw flue gas sulfur dioxide concentration, oxygen content, real-time desulfurization efficiency, limestone slurry density, and gas-liquid ratio.

4. The slurry supply control method as described in claim 1, characterized in that, In the process of identifying and handling passivation conditions, determining the presence of limestone particle passivation conditions includes: When the pH of the slurry remains above 5.5, and the pH trend does not increase over multiple consecutive sampling periods, and the sulfur dioxide concentration no longer decreases with the increase of limestone slurry supply, it is determined that limestone particle passivation has occurred.

5. The slurry supply control method as described in claim 1, characterized in that, In the passivation linkage treatment strategy, reducing the opening of the slurry supply regulating valve includes the following steps: Reduce the opening of the slurry supply regulating valve by 15% to 20%.

6. The slurry supply control method as described in claim 1, characterized in that, In the implementation of hard limit protection, the upper limit of the preset upper and lower limit range of the slurry pH value is 5.8 and the lower limit is 4.

8.

7. The slurry supply control method as described in claim 1, characterized in that, In the aforementioned dual-parameter composite regulation, the limestone slurry supply closed-loop regulation executed with the slurry pH value as the feedback quantity is a proportional-integral regulation.

8. A slurry supply control device for a desulfurization absorption tower, applied in electronic equipment, wherein the desulfurization absorption tower is used to introduce limestone slurry to remove sulfur dioxide from flue gas, characterized in that, The slurry supply control device includes: The composite regulation module is configured to perform dual-parameter composite regulation: acquiring the pH value of the slurry in the desulfurization absorption tower and the sulfur dioxide concentration at the clean flue gas outlet; using the slurry pH value as feedback to perform closed-loop regulation of limestone slurry supply and generate a basic valve opening command; using the deviation between the sulfur dioxide concentration and a preset target concentration as input to generate an opening correction value; superimposing the opening correction value onto the basic valve opening command to obtain the target opening of the slurry supply regulating valve, and outputting the target opening to the slurry supply regulating valve to control the supply flow rate of limestone slurry; The passivation identification and handling module is configured to perform passivation condition identification and handling: during the execution of the dual-parameter composite regulation, based on the real-time acquired multi-condition operating parameters, it comprehensively deduces the pH change trend of the slurry corresponding to the current slurry supply and the sulfur dioxide concentration change trend; when the slurry pH is continuously higher than the preset threshold and the slurry pH change trend is non-increasing, and at the same time the sulfur dioxide concentration does not decrease with the increase of limestone slurry supply flow, it is determined that limestone particle passivation condition has occurred, and the slurry supply control strategy is switched from the dual-parameter composite regulation to the passivation linkage handling strategy. The passivation linkage handling strategy is: reducing the opening of the slurry supply regulating valve to reduce the limestone slurry supply flow, while increasing the output of the desulfurization absorption tower oxidation fan; continuously monitoring the multi-condition operating parameters until the slurry pH value is detected to fluctuate and the sulfur dioxide concentration begins to decrease, it is determined that the passivation condition has been resolved, and the dual-parameter composite regulation is resumed. The amplitude limiting protection module is configured to perform hard amplitude limiting protection: limiting the target opening degree and the opening degree of the slurry regulating valve when the passivation linkage treatment strategy is executed to a preset safety range, and the upper and lower limits of the safety range correspond to the valve opening values ​​corresponding to the preset upper and lower limits of the slurry pH value.

9. An electronic device used in a desulfurization absorption tower, characterized in that, The electronic device includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs or instructions; The processor is used to execute the computer program or instructions to enable the electronic device to implement the slurry control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium for use in electronic devices, characterized in that, The storage medium carries one or more computer programs that can be executed by the electronic device, thereby enabling the electronic device to implement the slurry supply control method as described in any one of claims 1 to 7.

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