A semi-dry deacidification control method, device and terminal equipment

Abstract

The application discloses a semi-dry deacidification control method and device and a terminal equipment, and belongs to the field of deacidification process equipment control. The semi-dry deacidification control method comprises the following steps: reading acid gas data measured by a flue gas component analyzer and a flue gas temperature value measured by a flue gas temperature sensor; the acid gas data comprises concentration values of a plurality of acid gases; each acid gas corresponds to a preset target concentration value; a first acid gas with the maximum difference value between the concentration value and the corresponding preset target concentration value is determined from the plurality of acid gases, and a deacidifying agent slurry supply adjusting device is regulated according to the concentration value of the first acid gas; when the flue gas temperature value does not belong to a preset temperature value range, the deacidifying agent configuration adjusting device is regulated according to the difference value of the flue gas temperature value deviating from the preset temperature value range. Therefore, by implementing the application, the problem that the semi-dry deacidification process cannot simultaneously realize synchronous control of flue gas pollutant emission concentration and flue gas temperature and unstable automatic control can be solved.

Description

Technical Field

[0001] This application relates to the field of deacidification process equipment control, and in particular to a semi-dry deacidification control method, apparatus and terminal equipment. Background Technology

[0002] Waste-to-energy incineration is an effective waste treatment method that not only reduces waste volume but also enables resource reuse through heat recovery. However, the flue gas produced by waste incineration contains a large amount of acidic gases, such as sulfur dioxide and hydrogen chloride, which require further treatment.

[0003] Existing technologies for removing acidic gases include dry deacidification, semi-dry deacidification, wet deacidification, and combinations of these three processes. Dry deacidification has low efficiency, while wet deacidification is costly. Therefore, most existing technologies employ semi-dry deacidification or a combination of dry and semi-dry processes. However, combining multiple processes increases system complexity, thus raising the difficulty of automation control. With advancements in deacidifying agent manufacturing processes, high deacidification efficiency can be achieved using only semi-dry deacidification. When controlling the amount of deacidifying agent, existing technologies typically determine the dosage based on the total amount of acidic gas and the reaction principles between different acidic gases and deacidifying agents. However, in actual deacidification scenarios, the composition of flue gas from waste incineration varies significantly across different regions and time periods, and reaction efficiency is unpredictable. This leads to substantial control deviations, and the interaction between the amount of deacidifying agent and the temperature of the emitted flue gas further increases the difficulty of automation control, making stable automated control difficult to achieve.

[0004] Therefore, how to achieve synchronous control of flue gas pollutant emission concentration and flue gas temperature in the semi-dry desulfurization process and improve the stability of automated control is a technical problem that needs to be solved. Summary of the Invention

[0005] This application provides a semi-dry desulfurization control method, apparatus, and terminal equipment, which can solve the problems in the prior art of being unable to achieve synchronous control of flue gas pollutant emission concentration and flue gas temperature in the semi-dry desulfurization process, as well as the low stability of automated control.

[0006] One embodiment of this application provides a semi-dry deacidification control method, wherein the semi-dry deacidification system includes: a deacidifying agent preparation and adjustment device, a deacidifying agent slurry supply and adjustment device, a flue gas temperature sensor, and a flue gas component analyzer; the semi-dry deacidification control method includes:

[0007] The system reads the acid gas data measured by the flue gas composition analyzer and the flue gas temperature value measured by the flue gas temperature sensor; the acid gas data includes the concentration values ​​of several acid gases; each acid gas corresponds to a preset target concentration value;

[0008] The first acid gas with the largest difference between its concentration value and the corresponding preset target concentration value is determined from the plurality of acid gases, and the deacidifying agent slurry supply regulating device is adjusted according to the concentration value of the first acid gas.

[0009] When the flue gas temperature value is not within the preset temperature range, the deacidifying agent preparation and adjustment equipment is adjusted according to the difference between the flue gas temperature value and the preset temperature range.

[0010] Compared to other technologies, the above embodiments have the following advantages: Since the amount of deacidifying agent added is influenced by the temperature of the emitted flue gas, both the deacidifying agent configuration and adjustment equipment and the deacidifying agent slurry supply adjustment equipment need to have rapid adjustment response capabilities to achieve a high level of automation control. However, in existing technologies, the total deacidifying agent consumption is calculated by measuring the concentration of each acidic gas, which not only fails to guarantee precise control but also increases computational complexity, ultimately leading to a lower level of automation control. This application first sets a corresponding preset target concentration for each acidic gas. This preset target concentration can identify the acidic gas with the most severe emission exceedance in the flue gas. Since the deacidification process absorbs different acidic gases simultaneously, the concentration only affects the absorption rate of the acidic gas. Therefore, as long as the exceedance of the first acidic gas is controlled, the exceedance of other acidic gases will naturally be controlled simultaneously. This also ensures that the deacidifying agent is not over-added during the deacidification process, improving the control stability of the deacidification process. Since the deacidifying agent supply regulating equipment only tracks the concentration of the first acidic gas and the deacidifying agent preparation regulating equipment only tracks the temperature, even though the adjustment operations between the deacidifying agent preparation concentration and the deacidifying agent dosage affect each other, the computational complexity can still be guaranteed. By improving the response speed of each regulating device, the automation control level of the semi-dry deacidification system can be guaranteed, and the emission concentration of flue gas pollutants and the flue gas temperature in the semi-dry deacidification process can be controlled synchronously.

[0011] Further, determining the first acidic gas from the plurality of acidic gases whose concentration value differs most from the corresponding preset target concentration value includes:

[0012] The acidic gas whose concentration value exceeds the corresponding preset target concentration value is identified as the second acidic gas, and it is determined whether the second acidic gas exists in each of the acidic gases.

[0013] If it does not exist, the acidic gas with the smallest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas;

[0014] If it exists, the second acidic gas with the largest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas.

[0015] Compared with the technology, the above embodiments have the following beneficial effects: When all acidic gases do not exceed the corresponding preset target concentration value, the difference is negative. At this time, the smaller the absolute difference, the closer the acidic gas is to exceeding the standard. Therefore, the acidic gas with the smallest absolute difference needs to be regarded as the first acidic gas. When the concentration value of an acidic gas exceeds the preset target concentration value, the difference is positive. The larger the absolute difference, the more serious the second acidic gas exceeds the standard. Therefore, the second acidic gas with the largest absolute difference is regarded as the first acidic gas, ensuring that the correct acidic gas can always be tracked when adjusting the deacidifying agent slurry adjustment equipment.

[0016] Furthermore, the deacidifying agent slurry supply regulating device is used to regulate the input amount of the deacidifying agent diluent; the deacidifying agent preparation regulating device is used to regulate the concentration of the deacidifying agent diluent; the deacidifying agent diluent is obtained by diluting the deacidifying agent stock solution, which includes: impurity-free lime slurry with particle diameter smaller than a preset size or a soluble chemical solution for deacidification.

[0017] Compared with the technology, the above embodiments have the following beneficial effects: The traditional semi-dry deacidification process uses powdered lime to mix with industrial water, which requires an additional lime powder tank and a lime powder and industrial water mixing device. This application uses an impurity-free emulsion or solution-like deacidifying agent to replace the conventional powdered lime, thereby improving the deacidification efficiency, simplifying the semi-dry deacidification process equipment, and reducing the amount of hazardous waste generated.

[0018] Furthermore, the deacidifying agent slurry supply regulating device includes any one of the following devices: a deacidifying agent diluent slurry supply pump and a deacidifying agent diluent flow regulating valve.

[0019] Compared with the technology, the above embodiments have the following beneficial effects: with the dual guarantee of the deacidifying agent diluent supply pump and the deacidifying agent diluent flow regulating valve, when one regulation mode fails to control, it can be immediately switched to another regulation mode for control and regulation, ensuring the stable operation of the deacidification system.

[0020] Furthermore, when adjusting the deacidifying agent supply regulating device according to the concentration value of the first acidic gas, the following steps are included:

[0021] Based on the concentration of the first acidic gas, adjust the frequency of the deacidifying agent diluent supply pump or adjust the opening of the deacidifying agent diluent flow regulating valve.

[0022] Compared with the technology, the above embodiments have the following beneficial effects: the deacidifying agent diluent needs to pass through the deacidifying agent diluent supply pump and the deacidifying agent diluent flow regulating valve in sequence before entering the deacidification tower. Both of these devices can be used in a controllable manner. The specific device used as the core device for regulating the flow of the deacidifying agent diluent can be selected according to actual needs, thereby improving the flexibility of deacidification control.

[0023] Furthermore, the deacidifying agent preparation and adjustment equipment includes any one of the following: a deacidifying agent stock solution supply equipment and an industrial water flow regulating valve.

[0024] Compared with the technology, the above embodiments have the following beneficial effects: Since the concentration of the deacidifying agent stock solution is too high, it needs to be diluted with industrial water to form a deacidifying agent dilution solution before it can be used for subsequent deacidification. Therefore, the amount of deacidifying agent added can be adjusted by adjusting either the flow rate of the deacidifying agent stock solution or the flow rate of industrial water. The specific adjustment method can be reasonably selected according to the actual deacidification process, which improves the flexibility of deacidification control.

[0025] Furthermore, the semi-dry deacidification system also includes: a deacidification agent dilution tank, a deacidification tower, and flue gas to be deacidified;

[0026] The deacidifying agent dilution tank is used to mix the deacidifying agent stock solution and industrial water to obtain a deacidifying agent dilution solution.

[0027] The deacidifying agent stock solution enters the deacidifying agent dilution tank through the deacidifying agent stock solution supply equipment;

[0028] The industrial water enters the deacidifying agent dilution tank through the industrial water flow regulating valve;

[0029] The deacidifying agent dilution solution is fed from the deacidifying agent dilution tank to the deacidification tower through the deacidifying agent slurry supply regulating device;

[0030] The flue gas to be deacidified reacts with the deacidifying agent dilution in the deacidification tower, and then passes sequentially through the flue gas temperature sensor and the flue gas composition analyzer.

[0031] Compared to other technologies, the above embodiments have the following advantages: Compared to the traditional semi-dry deacidification process that uses powdered lime and industrial water mixed in a fixed ratio, this application dilutes the deacidifying agent stock solution in a deacidifying agent dilution tank, improving the flexibility of adjusting the concentration of the deacidifying agent entering the deacidification tower. Simultaneously, the adjustment of the industrial water flow can also accommodate subsequent flue gas temperature adjustments. By installing a flue gas temperature sensor and a flue gas composition analyzer at the final flue gas outlet, the deacidifying agent preparation and supply equipment can be adjusted based on real-time temperature and acid gas concentration values, improving the flexibility and response speed of automatic control.

[0032] Furthermore, when adjusting the deacidifying agent preparation and regulating equipment according to the flue gas temperature value, the following steps are included:

[0033] The opening degree of the industrial water flow regulating valve is adjusted according to the flue gas temperature value.

[0034] Compared with the technology, the above embodiments have the following beneficial effects: by adjusting the flow rate of the industrial water flow regulating valve, the concentration of the deacidifying agent stock solution can be directly controlled. Compared with adjusting the flow rate of the deacidifying agent stock solution, the industrial water flow rate has a more direct impact on the subsequent flue gas temperature value and the control efficiency is higher. In the face of scenarios with large temperature fluctuations, the flue gas temperature value can be stabilized more quickly.

[0035] Another embodiment of this application provides a semi-dry deacidification control device, which is applied to a semi-dry deacidification system. The semi-dry deacidification system includes: a deacidifying agent preparation and adjustment device, a deacidifying agent slurry supply and adjustment device, a flue gas temperature sensor, and a flue gas composition analyzer. The semi-dry deacidification control device includes: a data reading module, a first control module, and a second control module.

[0036] The data reading module is used to read the acid gas data measured by the flue gas composition analyzer and the flue gas temperature value measured by the flue gas temperature sensor; the acid gas data includes the concentration values ​​of several acid gases; each acid gas corresponds to a preset target concentration value;

[0037] The first control module is used to determine the first acid gas with the largest difference between its concentration value and the corresponding preset target concentration value from the plurality of acid gases, and to regulate the deacidifying agent slurry supply adjustment device according to the concentration value of the first acid gas.

[0038] The second control module is used to adjust the deacidifying agent preparation and adjustment device according to the difference between the flue gas temperature value and the preset temperature value range when the flue gas temperature value is not within the preset temperature value range.

[0039] Another embodiment of this application also provides a terminal device, including: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, it implements the steps of the semi-dry deacidification control method of this application. Attached Figure Description

[0040] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments 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 from these drawings without creative effort.

[0041] Figure 1 This is a schematic flowchart of a semi-dry deacidification control method provided in some embodiments of this application;

[0042] Figure 2 This is a process flow diagram of an existing deacidification system provided in some embodiments of this application;

[0043] Figure 3 This is a process flow diagram of a semi-dry deacidification system provided in some embodiments of this application;

[0044] Figure 4 This is a schematic diagram of a semi-dry deacidification control device provided in some embodiments of this application.

[0045] Explanation of reference numerals in the attached drawings: 1-Lime powder silo; 2-Lime metering device; 3-Lime slurry preparation box; 4-Industrial water valve; 5-Agitator; 6-Slurry discharge valve; 7-Lime slurry storage tank; 8-Lime slurry supply pump; 9-Lime flow regulating valve; 10-Deacidification tower; 11-Atomizer; 12-Quick lime powder silo; 13-Powder delivery fan; 14-Bag filter; 15-Wet deacidification tower; 16-Circulating pump; 17-Deacidifying agent stock solution tank; 18-Deacidifying agent stock solution slurry supply pump; 19-Deacidifying agent stock solution flow regulating valve; 20-Industrial water flow regulating valve; 21-Deacidifying agent dilution tank; 22-Deacidifying agent dilution solution slurry supply pump; 23-Deacidifying agent dilution solution flow regulating valve; 24-1-Industrial water flow meter; 24-2-Stock solution flow meter; 24-3-Slurry supply flow meter; 25-Flue gas temperature sensor; 26-Flue gas composition analyzer. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0048] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0049] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0053] Existing technologies for removing acidic gases include dry deacidification, semi-dry deacidification, wet deacidification, and combinations of these three processes. Dry deacidification has low efficiency, while wet deacidification is costly. Therefore, most existing technologies employ semi-dry deacidification or a combination of dry and semi-dry processes. However, combining multiple processes increases system complexity, thus raising the difficulty of automation control. With advancements in deacidifying agent manufacturing processes, high deacidification efficiency can be achieved using only semi-dry deacidification. When controlling the amount of deacidifying agent, existing technologies typically determine the dosage based on the total amount of acidic gas and the reaction principles between different acidic gases and deacidifying agents. However, in actual deacidification scenarios, the composition of flue gas from waste incineration varies significantly across different regions and time periods, and reaction efficiency is unpredictable. This leads to substantial control deviations, and the interaction between the amount of deacidifying agent and the temperature of the emitted flue gas further increases the difficulty of automation control, making stable automated control difficult to achieve.

[0054] refer to Figure 2 The process flow diagram of the existing deacidification system shown is as follows: after the lime powder in the lime powder silo 1 is metered by the lime metering device 2, it is mixed with industrial water in the lime slurry tank 3 at a fixed ratio. The industrial water is input into the lime slurry tank 3 through the industrial water valve 4. The industrial water valve 4 is an on / off electric valve or a pneumatic valve. After being stirred evenly by the agitator 5, it flows by gravity into the lime slurry storage tank 7 through the slurry discharge valve 6. During flue gas deacidification, the lime slurry in the lime slurry storage tank 7 is pumped into the atomizer 11 through the lime slurry supply pump 8 and the lime flow regulating valve 9 in sequence. It reacts with the acidic gas in the flue gas flowing through the deacidification tower 10. The reaction products and excess lime are dried into solid particles by the flue gas and settle into the bottom ash collection bin, or are carried by the flue gas to the subsequent bag filter dust collector 14 for collection. The lime flow regulating valve 9 is used to adjust the slurry supply. When semi-dry desulfurization cannot meet the emission standards for flue gas, or when issues such as blockage of the lime slurry supply pipeline or atomizer malfunction occur, the dry desulfurization system is put into operation. The quicklime in the quicklime powder silo 12 is transported by the powder-feeding fan 13 to the flue gas duct before the bag filter 14, where it reacts with acidic substances in the flue gas and is then captured by the bag filter. When semi-dry and dry desulfurization still cannot meet the emission standards for flue gas, a wet desulfurization tower 15 is added at the end of the system to further complete the flue gas desulfurization treatment.

[0055] pass Figure 2It can be seen that the existing combined semi-dry and dry deacidification process system is complex and the equipment is cumbersome. The lime slurry preparation process requires manual configuration of a fixed ratio, which requires high labor costs. At the same time, the powdered lime is prepared based on limestone calcination and air classification, and its purity, fineness and other qualities cannot be guaranteed. Moreover, the slurry supply pipes or atomizers are very easy to clog during the slurry preparation and supply process, resulting in increased equipment wear rate. Adding a wet deacidification system requires a large investment, and the system energy consumption and operating costs increase significantly.

[0056] Furthermore, in terms of operation and control, the requirements for acid removal are becoming increasingly stringent due to the continuous reduction of flue gas emission limits. Figure 2 The existing combination of semi-dry and dry desulfurization methods is clearly insufficient in its ability to simultaneously remove sulfur dioxide and hydrogen chloride. Especially when the acid gas content in the flue gas exceeds the design value, it can only be controlled by adjusting the slurry supply flow rate, and cannot achieve flexible adjustment of slurry concentration. The control method is singular, and it can only control the reduction of flue gas temperature by increasing the slurry flow rate, which cannot meet the control requirements for increasing temperature, thereby increasing the risk of corrosion of subsequent equipment. If the slurry concentration is increased, it is more likely to clog the slurry supply pipeline and damage the atomizer. If additional automated lime slurry preparation equipment is added, the automation difficulty of the entire process control is increased. Therefore, the existing desulfurization process cannot achieve stable automated control.

[0057] Please refer to Figure 1 To address the problems of interaction between the amount of deacidifying agent added and the temperature of the emitted flue gas in the semi-dry deacidification process, and the low stability of automated control in existing technologies, this application provides a semi-dry deacidification control method. This semi-dry deacidification control method is applied to… Figure 3 The semi-dry deacidification system shown includes: a deacidifying agent preparation and adjustment device, a deacidifying agent slurry supply and adjustment device, a flue gas temperature sensor 25, and a flue gas composition analyzer 26. Furthermore, the semi-dry deacidification system also includes: a stirrer 5, a deacidification tower 10, an atomizer 11, a bag filter 14, a deacidifying agent stock solution tank 17, a deacidifying agent dilution tank 21, an industrial water flow meter 24-1, a stock solution flow meter 24-2, and a slurry supply flow meter 24-3. In addition, Figure 3 The quicklime powder silo 12 and the distribution fan 13 can be added as needed according to the actual deacidification requirements.

[0058] Furthermore, in some embodiments of this application, the deacidifying agent slurry supply regulating device is used to regulate the input amount of the deacidifying agent diluent; the deacidifying agent preparation regulating device is used to regulate the concentration of the deacidifying agent diluent; the deacidifying agent diluent is obtained by diluting the deacidifying agent stock solution, the deacidifying agent stock solution comprising: impurity-free lime slurry with particle diameter smaller than a preset size or a soluble chemical solution for deacidification. The lime slurry is calcium hydroxide Ca(OH)2 slurry; the soluble chemical solution comprises: sodium hydroxide NaOH and magnesium hydroxide Mg(OH)2.

[0059] Preferably, in some embodiments of this application, the preset size is not limited, and it is understood that the smaller the preset size, the better the deacidification effect.

[0060] Furthermore, in some embodiments of this application, reference is made to... Figure 3 The deacidifying agent slurry supply regulating equipment includes any one of the following: a deacidifying agent diluent slurry supply pump 22 and a deacidifying agent diluent flow regulating valve 23. The deacidifying agent preparation regulating equipment includes any one of the following: a deacidifying agent concentrate slurry supply equipment and an industrial water flow regulating valve 20. The deacidifying agent concentrate slurry supply equipment includes any one of the following: a deacidifying agent concentrate slurry supply pump 18 and a deacidifying agent concentrate flow regulating valve 19.

[0061] Furthermore, in some embodiments of this application, the deacidification process of the semi-dry deacidification system includes:

[0062] The deacidifying agent dilution tank 21 is used to mix the deacidifying agent stock solution and industrial water to obtain a deacidifying agent dilution solution;

[0063] The deacidifying agent stock solution enters the deacidifying agent dilution tank 21 through the deacidifying agent stock solution supply equipment (i.e., deacidifying agent stock solution supply pump 18 and / or deacidifying agent stock solution flow regulating valve 19);

[0064] The industrial water enters the deacidifying agent dilution tank 21 through the industrial water flow regulating valve 20;

[0065] The deacidifying agent diluent is fed from the deacidifying agent dilution tank to the deacidification tower 10 through the deacidifying agent slurry supply regulating equipment (i.e., deacidifying agent diluent slurry supply pump 22 and / or deacidifying agent diluent flow regulating valve 23);

[0066] The flue gas to be deacidified reacts with the deacidifying agent dilution in the deacidification tower 10, and then passes sequentially through the flue gas temperature sensor 25 and the flue gas composition analyzer 26. The flue gas to be deacidified refers to... Figure 3 Flue gas A in the middle, Figure 3 Flue gas B refers to the flue gas after it has been deacidified by the deacidification tower 10, while flue gas C refers to the flue gas emitted from the chimney.

[0067] To explain more clearly Figure 3 The deacidification process of the semi-dry deacidification system shown below will be discussed in conjunction with the following steps. Figure 3 The equipment shown provides a detailed description of the deacidification process: The deacidifying agent stock solution is pre-stored in the deacidifying agent stock solution tank 17. It is then fed into the deacidifying agent dilution tank 21 via the deacidifying agent stock solution supply pump 18 and the deacidifying agent stock solution flow regulating valve 19. Simultaneously, industrial water is fed into the deacidifying agent dilution tank 21 via the industrial water flow regulating valve 20. The deacidifying agent stock solution and industrial water are mixed evenly in the deacidifying agent dilution tank 21 by the agitator 5, and then sequentially fed into the atomizer 11 via the deacidifying agent dilution liquid supply pump 22 and the deacidifying agent dilution liquid flow regulating valve 23. The atomizer 11 atomizes the deacidifying agent dilution liquid and sprays it into the deacidification tower 10 to remove acidic gases from the flue gas. A flue gas temperature sensor 25 is installed at the inlet of the bag filter 14, and a flue gas composition analyzer 26 is installed at the outlet of the bag filter 14.

[0068] Preferably, in some embodiments of this application, various flow regulating valves that require adjustment of opening degree or pumps that require adjustment of frequency can be controlled by PID (Proportional Integral Derivative) control when they need to be adjusted according to the acid gas concentration value or the flue gas temperature value.

[0069] Furthermore, such as Figure 1 As shown, the semi-dry deacidification control method includes S101 to S103, specifically as follows:

[0070] S101: Read the acid gas data measured by the flue gas composition analyzer 26 and the flue gas temperature value measured by the flue gas temperature sensor 25; the acid gas data includes the concentration values ​​of several acid gases; each acid gas corresponds to a preset target concentration value.

[0071] Furthermore, through Figure 3 It can be seen that the flue gas temperature sensor 25 is used to monitor the flue gas temperature at the inlet of the bag filter 14. Since residual acidic gases in the flue gas will accelerate corrosion or cause the bag filter 14 to become clogged when entering subsequent equipment at excessively low temperatures, and will damage the anti-corrosion layer when entering subsequent equipment at excessively high temperatures, it is necessary to monitor the temperature of the flue gas entering the bag filter 14 to prevent excessive deviation from the design temperature range and thus prevent equipment damage. The flue gas composition analyzer 26 is installed at the chimney outlet to monitor the concentration of acidic gases in the flue gas after the final acid removal process, preventing excessive acidic gas emissions.

[0072] Furthermore, in some embodiments of this application, the preset target concentration value corresponding to the acidic gas is the emission limit concentration of each acidic gas, and the preset target concentration values ​​are different for different types of acidic gases. The acidic gases include, but are not limited to: sulfur dioxide (SO2), hydrochloric acid (HCl), and hydrogen fluoride (HF).

[0073] S102: Determine the first acid gas with the largest difference between its concentration value and the preset target concentration value from the plurality of acid gases, and adjust the deacidifying agent supply regulating device according to the concentration value of the first acid gas.

[0074] Furthermore, in some embodiments of this application, determining the first acidic gas from the plurality of acidic gases whose concentration value has the largest difference from the corresponding preset target concentration value includes:

[0075] The acidic gas whose concentration value exceeds the corresponding preset target concentration value is identified as the second acidic gas, and it is determined whether the second acidic gas exists in each of the acidic gases.

[0076] If it does not exist, the acidic gas with the smallest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas;

[0077] If it exists, the second acidic gas with the largest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas.

[0078] When all acidic gases do not exceed their corresponding preset target concentration values, the difference is negative. In this case, the smaller the absolute difference, the closer the acidic gas is to exceeding the standard. Therefore, the acidic gas with the smallest absolute difference should be taken as the first acidic gas. When the concentration of an acidic gas exceeds the preset target concentration value, the difference is positive. The larger the absolute difference, the more serious the second acidic gas exceeds the standard. Therefore, the second acidic gas with the largest absolute difference should be taken as the first acidic gas to ensure that the correct acidic gas can always be tracked when adjusting the deacidifying agent supply adjustment equipment.

[0079] Furthermore, in some embodiments of this application, when adjusting the deacidifying agent preparation and regulating device according to the flue gas temperature value, the following is included:

[0080] The opening degree of the industrial water flow regulating valve 20 is adjusted according to the flue gas temperature value.

[0081] Preferably, in some embodiments of this application, when adjusting the deacidifying agent preparation and regulating equipment according to the flue gas temperature value, the method further includes: adjusting the frequency of the deacidifying agent raw material supply pump 18 or adjusting the opening degree of the deacidifying agent raw material flow regulating valve 19 according to the flue gas temperature value. Specifically, the flue gas temperature value specifically refers to... Figure 3 Temperature value of flue gas B.

[0082] Preferably, in some embodiments of this application, when the deacidifying agent raw material supply pump 18 is adjusted according to the flue gas temperature value, the deacidifying agent raw material supply pump 18 adopts frequency conversion control. Other valves, such as the deacidifying agent raw material flow regulating valve 19 and the industrial water flow regulating valve 20, can be any valve, including but not limited to adjustable opening electric valves, on / off electric valves, and pneumatic valves.

[0083] Preferably, in some embodiments of this application, the flow rate of the deacidifying agent stock solution in the subsequent slurry supply pipeline can be adjusted by setting a return pipe in the outlet pipeline of the deacidifying agent stock solution slurry pump 18 according to the flue gas temperature value, thereby controlling the amount of deacidifying agent added in the subsequent deacidification tower 10.

[0084] Preferably, in some embodiments of this application, when the flow rate regulating valve 19 of the deacidifying agent stock solution is adjusted according to the flue gas temperature value, the deacidifying agent stock solution flow rate regulating valve 19 is an adjustable-opening electric valve. Other valves, such as the deacidifying agent stock solution supply pump 18, can adopt any control method, including but not limited to power frequency control and frequency conversion control; and the industrial water flow regulating valve 20 can adopt any control method, including but not limited to an adjustable-opening electric valve, an on / off electric valve, and a pneumatic valve.

[0085] The concentration of the deacidifying agent concentrate can be directly controlled by adjusting the frequency of the deacidifying agent feed pump or the industrial water flow regulating valve. Compared to adjusting the flow rate of the deacidifying agent diluent, this method is more suitable for scenarios with more severe acid gas exceedances and larger temperature fluctuations. In these scenarios, only a small adjustment to the concentration of the deacidifying agent diluent is needed to increase the amount of deacidifying agent added to the deacidification tower, reducing the impact of the deacidifying agent diluent on the flue gas temperature inside the tower. At the same time, the industrial water flow rate has a more direct impact on the subsequent flue gas temperature and is more efficient in controlling it. In scenarios with large temperature fluctuations, the flue gas temperature can be stabilized more quickly. In addition, the dual guarantee of the deacidifying agent feed pump and the deacidifying agent flow regulating valve allows for immediate switching to the other regulation method if one regulation method fails, ensuring the stable operation of the deacidification system.

[0086] Furthermore, in some embodiments of this application, when adjusting the deacidifying agent slurry supply regulating device according to the concentration value of the first acidic gas, the following is included:

[0087] Based on the concentration of the first acidic gas, adjust the frequency of the deacidifying agent dilution slurry pump 22 or adjust the opening of the deacidifying agent dilution flow regulating valve 23.

[0088] Adjusting the amount of deacidifying agent added via a deacidifying agent dilution supply pump or a deacidifying agent dilution flow regulating valve is more suitable for scenarios where both temperature and acid gas concentration are excessively high. By increasing the amount of deacidifying agent added, the amount of deacidifying agent in the deacidification tower is increased, as is the amount of industrial water added. This reduces both the acid gas concentration and the flue gas temperature, enabling rapid response of automatic control. Furthermore, the dual protection provided by the deacidifying agent dilution supply pump and the deacidifying agent dilution flow regulating valve allows for immediate switching to the other regulation method if one fails, ensuring stable operation of the deacidification system.

[0089] Preferably, in some embodiments of this application, when the deacidifying agent diluent supply pump 22 is adjusted according to the concentration value of the first acidic gas, the deacidifying agent diluent supply pump 22 is controlled by frequency conversion. Other valves, such as the deacidifying agent diluent flow regulating valve 23, can be any valve, including but not limited to adjustable opening electric valves, on / off electric valves, and pneumatic valves.

[0090] Preferably, in some embodiments of this application, when the flow rate regulating valve 23 of the deacidifying agent diluent is adjusted according to the concentration value of the first acidic gas, the flow rate regulating valve 23 of the deacidifying agent diluent is an adjustable electric valve. Other components, such as the deacidifying agent diluent supply pump 22, can adopt any control method, including but not limited to power frequency control and variable frequency control.

[0091] S103: When the flue gas temperature value is not within the preset temperature range, adjust the deacidifying agent preparation and adjustment equipment according to the difference between the flue gas temperature value and the preset temperature range.

[0092] Furthermore, in some embodiments of this application, adjusting the opening degree of the industrial water flow regulating valve 20 based on the difference between the flue gas temperature value and the preset temperature range includes:

[0093] When the flue gas temperature exceeds the maximum value of the preset temperature range, the concentration of the deacidifying agent diluent in the deacidifying agent dilution tank 21 is reduced, that is, the opening of the industrial water flow regulating valve 20 is increased.

[0094] When the flue gas temperature is less than the minimum value of the preset temperature range, the concentration of the deacidifying agent dilution liquid in the deacidifying agent dilution tank 21 is increased, that is, the opening of the industrial water flow regulating valve 20 is reduced.

[0095] Preferably, in some embodiments of this application, when the flue gas temperature value is not within a preset temperature range, the difference between the flue gas temperature value and the preset temperature range can be used to adjust any one of the following devices: the deacidifying agent stock solution supply pump 18, the deacidifying agent diluent supply pump 22, the deacidifying agent stock solution flow regulating valve 19, or the deacidifying agent diluent flow regulating valve 23. For example, when the flue gas temperature value is greater than the maximum value of the preset temperature range, the concentration of the deacidifying agent diluent can be reduced, the opening of the deacidifying agent diluent flow regulating valve 23 can be increased, or the deacidifying agent diluent supply pump 23 can be increased. The frequency of the deacidifying agent diluent in the deacidification tower 10 is increased to increase the input amount of the deacidifying agent diluent and reduce the flue gas temperature. If the temperature is less than the minimum value of the preset temperature range, the reverse operation is performed. For example, when the flue gas temperature is greater than the maximum value of the preset temperature range, the opening of the industrial water flow regulating valve 20 can be increased, or the frequency of the deacidifying agent raw material slurry pump 18 can be decreased, or the opening of the deacidifying agent raw material flow regulating valve 19 can be reduced, so that the concentration of the deacidifying agent diluent entering the deacidification tower 10 is reduced, thereby causing the opening of the deacidifying agent diluent flow regulating valve 23 or the frequency of the deacidifying agent diluent slurry pump 22 to increase.

[0096] In summary, the semi-dry deacidification control method provided in this application has the following advantages compared to the prior art: Since the amount of deacidifying agent added is influenced by the temperature of the emitted flue gas, both the deacidifying agent configuration and adjustment equipment and the deacidifying agent slurry supply adjustment equipment need to have rapid adjustment response capabilities to achieve a high level of automation control. However, the prior art calculates the total deacidifying agent consumption by measuring the concentration of each acidic gas, which not only fails to guarantee precise control but also increases computational complexity, ultimately leading to a lower level of automation control. This application first sets a corresponding preset target concentration for each acidic gas. This preset target concentration can identify the acidic gas with the most severe emission exceedance in the flue gas. Since the deacidification process absorbs different acidic gases simultaneously, the concentration only affects the absorption rate of the acidic gas. Therefore, as long as the exceedance of the first acidic gas is controlled, the exceedance of other acidic gases will naturally be controlled simultaneously. This also ensures that the deacidifying agent is not over-added during the deacidification process, improving the control stability of the deacidification process. Because the adjustment of the deacidifying agent slurry supply equipment only tracks the concentration of the first acidic gas, and the adjustment of the deacidifying agent preparation equipment only tracks the temperature, even though the adjustment operations between the deacidifying agent preparation concentration and the deacidifying agent dosage affect each other, the computational complexity can still be maintained at a low level. By improving the response speed of each adjustment device, the automation control level of the semi-dry deacidification system is guaranteed, while simultaneously achieving synchronous control of flue gas pollutant emission concentration and flue gas temperature during the semi-dry deacidification process. Furthermore, using a highly efficient deacidifying agent can significantly simplify the number of process equipment in the original semi-dry deacidification system, broaden the concentration range of the deacidifying agent dilution solution, improve deacidification efficiency and automation control level, reduce hazardous waste generation, and reduce equipment wear and maintenance workload. Moreover, the above control method can coordinate the adjustment of deacidification efficiency and flue gas temperature, and achieves automatic control, avoiding the shortcomings of the original process method that could not achieve both simultaneously, reducing manual workload, and solving the problem of inaccurate manual control.

[0097] like Figure 4 As shown, based on the above-mentioned method embodiments, this application provides a semi-dry deacidification control device, which is applied to a semi-dry deacidification system. The semi-dry deacidification system includes: a deacidifying agent preparation and adjustment device, a deacidifying agent slurry supply and adjustment device, a flue gas temperature sensor 25, and a flue gas composition analyzer 26. The semi-dry deacidification control device includes: a data reading module 201, a first control module 202, and a second control module 203.

[0098] Further, in some embodiments of this application, the data reading module 201 is used to read the acidic gas data measured by the flue gas composition analyzer 26 and the flue gas temperature value measured by the flue gas temperature sensor 25; the acidic gas data includes the concentration values ​​of a plurality of acidic gases; each acidic gas corresponds to a preset target concentration value; the first control module 202 is used to determine the first acidic gas with the largest difference between its concentration value and the corresponding preset target concentration value from the plurality of acidic gases, and to regulate the deacidifying agent slurry supply adjustment device according to the concentration value of the first acidic gas; the second control module 203 is used to regulate the deacidifying agent preparation adjustment device according to the difference between the flue gas temperature value and the preset temperature value range when the flue gas temperature value is not within the preset temperature value range.

[0099] Further, in some embodiments of this application, determining the first acidic gas with the largest difference between its concentration value and the corresponding preset target concentration value from the plurality of acidic gases includes: identifying the acidic gas with a concentration value exceeding the corresponding preset target concentration value as the second acidic gas, and determining whether the second acidic gas exists in each of the acidic gases; if not, identifying the acidic gas with the smallest absolute difference between its concentration value and the preset target concentration value as the first acidic gas; if it exists, identifying the second acidic gas with the largest absolute difference between its concentration value and the preset target concentration value as the first acidic gas.

[0100] Furthermore, in some embodiments of this application, the deacidifying agent slurry supply regulating device is used to regulate the input amount of the deacidifying agent diluent; the deacidifying agent preparation regulating device is used to regulate the concentration of the deacidifying agent diluent; the deacidifying agent diluent is obtained by diluting the deacidifying agent stock solution, which includes: impurity-free lime slurry with particle diameter smaller than a preset size or a soluble chemical solution for deacidification.

[0101] Furthermore, in some embodiments of this application, the deacidifying agent slurry supply regulating device includes any one of the following devices: a deacidifying agent diluent slurry supply pump and a deacidifying agent diluent flow regulating valve.

[0102] Furthermore, in some embodiments of this application, when adjusting the deacidifying agent slurry supply regulating device according to the concentration value of the first acidic gas, it includes: adjusting the frequency of the deacidifying agent diluent slurry supply pump or adjusting the opening degree of the deacidifying agent diluent flow regulating valve according to the concentration value of the first acidic gas.

[0103] Furthermore, in some embodiments of this application, the deacidifying agent preparation and adjustment equipment includes any one of the following devices: a deacidifying agent stock solution supply device and an industrial water flow regulating valve.

[0104] Furthermore, in some embodiments of this application, the semi-dry deacidification system further includes: a deacidifying agent dilution tank 21, a deacidification tower 10, and flue gas to be deacidified; wherein, the deacidifying agent dilution tank 21 is used to mix the deacidifying agent stock solution and industrial water to obtain a deacidifying agent dilution solution; the deacidifying agent stock solution enters the deacidifying agent dilution tank 21 through the deacidifying agent stock solution supply device; the industrial water enters the deacidifying agent dilution tank 21 through the industrial water flow regulating valve 20; the deacidifying agent dilution solution is input from the deacidifying agent dilution tank 21 to the deacidification tower 10 through the deacidifying agent supply regulating device; the flue gas to be deacidified reacts with the deacidifying agent dilution solution in the deacidification tower 10, and then passes sequentially through the flue gas temperature sensor 25 and the flue gas composition analyzer 26.

[0105] Furthermore, in some embodiments of this application, when adjusting the deacidifying agent preparation and regulating equipment according to the flue gas temperature value, it includes: adjusting the opening degree of the industrial water flow regulating valve according to the flue gas temperature value.

[0106] It is understood that the above-described apparatus embodiments correspond to the method embodiments of this application, and can implement the semi-dry deacidification control method provided by any of the above-described method embodiments of this application.

[0107] It should be noted that the device embodiments described above are merely illustrative, and some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided in this application, the connection relationships between modules indicate that they have communication connections, which can specifically be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0108] In summary, the semi-dry deacidification control device provided in this application has the following advantages compared to the prior art: Since the amount of deacidifying agent added is influenced by the temperature of the emitted flue gas, both the deacidifying agent configuration adjustment equipment and the deacidifying agent slurry supply adjustment equipment need to have rapid adjustment response capabilities to achieve a high level of automation control. However, the prior art calculates the total deacidifying agent consumption by measuring the concentration of each acidic gas, which not only fails to guarantee precise control but also increases computational complexity, ultimately leading to a lower level of automation control. This application first sets a corresponding preset target concentration for each acidic gas. This preset target concentration can identify the acidic gas with the most severe emission exceedance in the flue gas. Since the deacidification process absorbs different acidic gases simultaneously, the concentration only affects the absorption rate of the acidic gas. Therefore, as long as the exceedance of the first acidic gas is controlled, the exceedance of other acidic gases will naturally be controlled simultaneously. This also ensures that the deacidifying agent is not over-added during the deacidification process, improving the control stability of the deacidification process. Because the adjustment of the desulfurizing agent supply equipment only tracks the concentration of the first acidic gas, and the adjustment of the desulfurizing agent preparation equipment only tracks the flue gas temperature, even though the adjustment operations between the desulfurizing agent preparation concentration and the desulfurizing agent dosage affect each other, the computational complexity can still be maintained at a low level. By improving the response speed of each adjustment device, the automation control level of the semi-dry desulfurization system is guaranteed, and the emission concentration of flue gas pollutants and the flue gas temperature in the semi-dry desulfurization process are controlled synchronously. In addition, the use of efficient desulfurizing agents can significantly simplify the number of process equipment in the original semi-dry desulfurization system, broaden the preparation concentration range of the desulfurizing agent dilution solution, improve desulfurization efficiency and automation control level, reduce hazardous waste generation, reduce equipment wear and maintenance workload, and the above control method can take into account the coordinated adjustment of desulfurization efficiency and flue gas temperature, and realize automatic control, avoiding the shortcomings of the original process method that could not achieve both simultaneously, reducing manual workload, and solving the problem of inaccurate manual control.

[0109] Based on the above embodiments of the semi-dry deacidification control method, another embodiment of this application provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the semi-dry deacidification control method of any embodiment of this application.

[0110] For example, in this embodiment, the computer program can be divided into one or more modules, which are stored in the memory and executed by the processor to complete this application. The one or more module units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the terminal device.

[0111] The terminal device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0112] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the terminal device, connecting all parts of the terminal device via various interfaces and lines.

[0113] Based on the above-described method embodiments, another embodiment of this application provides a computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute the semi-dry deacidification control method described in any of the above-described method embodiments of this application.

[0114] The modules / units integrated in the semi-dry deacidification control device / terminal equipment, if implemented as software functional units and sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

Claims

1. A semi-dry deacidification control method, characterized in that, The semi-dry deacidification control method is applied to a semi-dry deacidification system, wherein the semi-dry deacidification system includes: deacidifying agent preparation and adjustment equipment, deacidifying agent slurry supply and adjustment equipment, flue gas temperature sensor, and flue gas component analyzer; the semi-dry deacidification control method includes: The system reads the acid gas data measured by the flue gas composition analyzer and the flue gas temperature value measured by the flue gas temperature sensor; the acid gas data includes the concentration values ​​of several acid gases; each acid gas corresponds to a preset target concentration value; The first acid gas with the largest difference between its concentration value and the corresponding preset target concentration value is determined from the plurality of acid gases, and the deacidifying agent slurry supply regulating device is adjusted according to the concentration value of the first acid gas. When the flue gas temperature value is not within the preset temperature range, the deacidifying agent preparation and adjustment equipment is adjusted according to the difference between the flue gas temperature value and the preset temperature range. The determination of the first acidic gas from the plurality of acidic gases that has the largest difference between its concentration value and the corresponding preset target concentration value includes: The acidic gas whose concentration value exceeds the corresponding preset target concentration value is identified as the second acidic gas, and it is determined whether the second acidic gas exists in each of the acidic gases. If it does not exist, the acidic gas with the smallest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas; If it exists, the second acidic gas with the largest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas; The deacidifying agent slurry supply regulating device includes: a deacidifying agent diluent slurry supply pump and a deacidifying agent diluent flow regulating valve; When adjusting the deacidifying agent supply regulating equipment according to the concentration value of the first acidic gas, the following is included: Based on the concentration of the first acidic gas, adjust the frequency of the deacidifying agent dilution slurry pump or adjust the opening of the deacidifying agent dilution flow regulating valve; The deacidifying agent preparation and adjustment equipment includes: a deacidifying agent stock solution supply equipment and an industrial water flow regulating valve; The semi-dry deacidification system also includes: a deacidifying agent dilution tank and a deacidification tower; The deacidifying agent dilution tank is used to mix the deacidifying agent stock solution and industrial water to obtain a deacidifying agent dilution solution. The deacidifying agent stock solution enters the deacidifying agent dilution tank through the deacidifying agent stock solution supply equipment; The industrial water enters the deacidifying agent dilution tank through the industrial water flow regulating valve; The deacidifying agent dilution solution is fed from the deacidifying agent dilution tank to the deacidification tower through the deacidifying agent slurry supply regulating device; After the deacidified flue gas reacts with the deacidifying agent dilution in the deacidification tower, it passes sequentially through the flue gas temperature sensor and the flue gas composition analyzer.

2. The semi-dry deacidification control method as described in claim 1, characterized in that, The deacidifying agent slurry supply regulating device is used to regulate the input amount of the deacidifying agent diluent; the deacidifying agent preparation regulating device is used to regulate the concentration of the deacidifying agent diluent; the deacidifying agent diluent is obtained by diluting the deacidifying agent stock solution, which includes: impurity-free lime slurry with particle diameter smaller than a preset size or a soluble chemical solution for deacidification.

3. The semi-dry deacidification control method as described in claim 1, characterized in that, When adjusting the deacidifying agent preparation and regulating equipment according to the flue gas temperature value, the following is included: The opening degree of the industrial water flow regulating valve is adjusted according to the flue gas temperature value.

4. A semi-dry deacidification control device, characterized in that, The semi-dry deacidification control device is applied to a semi-dry deacidification system, wherein the semi-dry deacidification system includes: a deacidifying agent preparation and adjustment device, a deacidifying agent slurry supply and adjustment device, a flue gas temperature sensor, and a flue gas composition analyzer; the semi-dry deacidification control device includes: a data reading module, a first control module, and a second control module. The data reading module is used to read the acid gas data measured by the flue gas composition analyzer and the flue gas temperature value measured by the flue gas temperature sensor; the acid gas data includes the concentration values ​​of several acid gases; each acid gas corresponds to a preset target concentration value; The first control module is used to determine the first acid gas with the largest difference between its concentration value and the corresponding preset target concentration value from the plurality of acid gases, and to regulate the deacidifying agent slurry supply adjustment device according to the concentration value of the first acid gas. The second control module is used to adjust the deacidifying agent preparation and adjustment device according to the difference between the flue gas temperature value and the preset temperature value range when the flue gas temperature value is not within the preset temperature value range; The determination of the first acidic gas from the plurality of acidic gases that has the largest difference between its concentration value and the corresponding preset target concentration value includes: The acidic gas whose concentration value exceeds the corresponding preset target concentration value is identified as the second acidic gas, and it is determined whether the second acidic gas exists in each of the acidic gases. If it does not exist, the acidic gas with the smallest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas; If it exists, the second acidic gas with the largest absolute difference between the concentration value and the preset target concentration value shall be taken as the first acidic gas; The deacidifying agent slurry supply regulating device includes: a deacidifying agent diluent slurry supply pump and a deacidifying agent diluent flow regulating valve; When adjusting the deacidifying agent supply regulating equipment according to the concentration value of the first acidic gas, the following is included: Based on the concentration of the first acidic gas, adjust the frequency of the deacidifying agent dilution slurry pump or adjust the opening of the deacidifying agent dilution flow regulating valve; The deacidifying agent preparation and adjustment equipment includes: a deacidifying agent stock solution supply equipment and an industrial water flow regulating valve; The semi-dry deacidification system also includes: a deacidifying agent dilution tank and a deacidification tower; The deacidifying agent dilution tank is used to mix the deacidifying agent stock solution and industrial water to obtain a deacidifying agent dilution solution. The deacidifying agent stock solution enters the deacidifying agent dilution tank through the deacidifying agent stock solution supply equipment; The industrial water enters the deacidifying agent dilution tank through the industrial water flow regulating valve; The deacidifying agent dilution solution is fed from the deacidifying agent dilution tank to the deacidification tower through the deacidifying agent slurry supply regulating device; After the deacidified flue gas reacts with the deacidifying agent dilution in the deacidification tower, it passes sequentially through the flue gas temperature sensor and the flue gas composition analyzer.

5. A terminal device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement a semi-dry deacidification control method as described in any one of claims 1 to 3.

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