Ash circulation control method and device based on flue dust purification

Abstract

The application provides a flue dust purification-based ash circulation control method and device, and relates to the technical field of industrial flue gas pollutant treatment. The method comprises the following steps: acquiring a first attribute parameter of a reaction agent in ash circulation and a second attribute parameter of flue dust; determining a first volume threshold and a second volume threshold based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold; continuously monitoring the storage volume of ash in a current target ash bin; in response to the storage volume of ash being less than the first volume threshold, controlling the addition of the reaction agent into the ash circulation; or in response to the storage volume of ash being greater than the second volume threshold, controlling the discharge of the storage ash in the target ash bin. The application can ensure high desulfurization and denitrification efficiency, improve the utilization rate of the reaction agent, and avoid waste of resources.

Description

Technical Field

[0001] This application relates to the field of industrial flue gas pollutant treatment technology, and in particular to an ash circulation control method and apparatus based on flue gas dust purification. Background Technology

[0002] Among related technologies, high-ratio ash-calcium circulation is a semi-dry flue gas purification technology with advantages such as synergistic treatment of multiple pollutants, high removal efficiency, simple system, low water consumption, low operating costs, long service life, and convenient maintenance. The ash circulation system is a key unit of this technology, directly affecting the sulfur and nitrogen oxide removal efficiency and the economic viability of the ash-calcium reactant. The high-ratio ash-calcium circulation flue gas purification system feeds high-ratio powdered materials (including fresh fly ash and added calcium-based removal agents) into the reactor, utilizing an active calcium reactant at a rate tens or even hundreds of times higher than the theoretical reaction rate to remove sulfur and nitrogen oxide pollutants. This increases the contact probability between gas and solid reactants, thereby improving the removal efficiency of flue gas pollutants.

[0003] Therefore, ensuring high desulfurization and denitrification efficiency while improving the utilization rate of reactants and avoiding resource waste has become an important research direction. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art. Therefore, one objective of this application is to propose an ash recycling control method based on flue gas purification.

[0005] The second objective of this application is to propose an ash circulation control device based on smoke and dust purification.

[0006] The third objective of this application is to propose an electronic device.

[0007] The fourth objective of this application is to provide a non-transitory computer-readable storage medium.

[0008] The fifth objective of this application is to provide a computer program product.

[0009] To achieve the above objectives, the first aspect of this application proposes a method for ash circulation control based on flue gas purification, comprising:

[0010] Obtain the first property parameters of the reactants and the second property parameters of the flue gas in the ash cycle;

[0011] The first volume threshold and the second volume threshold are determined based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold;

[0012] Continuously monitor the ash storage volume in the current target ash silo, and when the ash storage volume is less than the first volume threshold, control the addition of reactant to the ash circulation; or

[0013] In response to the ash storage volume exceeding the second volume threshold, the system controls the discharge of ash from the target ash hopper.

[0014] The embodiments of this application can control the concentration of reactive elements in the circulating ash under equilibrium conditions, ensuring high desulfurization and denitrification efficiency while improving the utilization rate of the reactants and avoiding waste of resources.

[0015] To achieve the above objectives, a second aspect of this application provides an ash circulation control device based on smoke and dust purification, comprising:

[0016] The acquisition module is used to acquire the first property parameters of the reactants and the second property parameters of the flue gas in the ash cycle.

[0017] The determination module is used to determine a first volume threshold and a second volume threshold based on a first attribute parameter and a second attribute parameter, wherein the second volume threshold is greater than the first volume threshold;

[0018] The control module is used to continuously monitor the ash storage volume in the current target ash hopper. In response to the ash storage volume being less than the first volume threshold, it controls the addition of reactant to the ash circulation; or in response to the ash storage volume being greater than the second volume threshold, it controls the discharge of ash from the target ash hopper.

[0019] To achieve the above objectives, a third aspect of this application provides an electronic device comprising:

[0020] At least one processor; and

[0021] A memory that is communicatively connected to at least one processor; wherein,

[0022] The memory stores instructions that can be executed by at least one processor, which enables the at least one processor to perform the ash circulation control method based on smoke and dust purification provided in the first aspect embodiment of this application.

[0023] To achieve the above objectives, a fourth aspect of this application provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to cause a computer to execute the ash circulation control method based on smoke and dust purification provided in the first aspect of this application.

[0024] To achieve the above objectives, a fifth aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the ash circulation control method based on smoke and dust purification provided in the first aspect of this application. Attached Figure Description

[0025] Figure 1This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application;

[0026] Figure 2 This is a schematic diagram of an embodiment of the ash circulation control system based on smoke and dust purification according to this application;

[0027] Figure 3 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application;

[0028] Figure 4 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application;

[0029] Figure 5 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application;

[0030] Figure 6 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application;

[0031] Figure 7 This is a structural block diagram of an ash circulation control device based on smoke and dust purification according to an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0034] The following describes the ash circulation control method and apparatus based on smoke and dust purification according to embodiments of this application, with reference to the accompanying drawings.

[0035] Figure 1 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application, as follows: Figure 1 As shown, the method includes the following steps:

[0036] S101, obtain the first property parameters of the reactant and the second property parameters of the flue gas in the ash cycle.

[0037] Figure 2 This is a schematic diagram of an embodiment of the ash circulation control system based on smoke and dust purification according to this application, as shown below. Figure 2As shown in the embodiments of this application, taking calcium-based descaling agent as the reactant, active calcium as the reactant element, and ash as calcium ash as an example, in the ash cycle, after the desulfurization and denitrification reactions, the high-dust-content flue gas passes through a dust collector to collect the calcium ash (including fresh fly ash, unreacted calcium-based descaling agent, and desulfurization and denitrification products) and temporarily stores it in an ash silo. The calcium ash in the silo is then sequentially humidified through the bottom ash discharge valve and fluidized bed chute into the humidification mixer before being fed back into the reactor to begin the next cycle. New ash is continuously generated during boiler operation. When the ash level in the ash silo exceeds a certain level, the ash discharge pump is activated to discharge the excess calcium ash.

[0038] Based on prior knowledge, the sulfur and nitrogen removal efficiency of the reactor in a high-ratio ash-calcium circulating flue gas system is mainly affected by factors such as the content of active calcium in solid particles (the concentration of active calcium in the circulating ash), reaction temperature, and humidity. In actual operation, to ensure the removal efficiency meets the standards, the concentration of active calcium in the circulating ash needs to be controlled above a certain limit. As the desulfurization and denitrification reactions proceed, the added removal agent is continuously consumed, and fresh fly ash carried by the upstream flue gas is also continuously entering the ash silo, causing the active calcium content in the circulating ash to gradually decrease. To ensure the removal effect, it is necessary to replenish an appropriate amount of removal agent regularly. After the ash volume reaches a certain level, excess ash needs to be discharged, and some unreacted active calcium is also discharged along with it.

[0039] Therefore, in this embodiment of the application, in order to take into account the desulfurization and denitrification effects of the ash cycle, the first attribute parameters of the reactant and the second attribute parameters of the flue dust can be obtained to facilitate subsequent calculation and control of the timing of adding reactant and discharging flue dust from the ash silo in the ash cycle. The first attribute parameters include the deactivation time of the reactant element, the theoretical consumption of the reactant, and the concentration limit of the reactant element; the second attribute parameters include the flue dust mass flow rate and the flue dust density.

[0040] S102, determine the first volume threshold and the second volume threshold based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold.

[0041] In this embodiment, after the reactants in the reactor fully react with the flue gas, the concentration of sulfur and nitrogen pollutants at the outlet will increase, while the concentration of near-deactivated reactant elements will decrease, and the volume of flue gas in the ash bin will also increase. Therefore, in this embodiment, a first volume threshold and a second volume threshold can be determined based on the deactivation time of reactant elements, the theoretical consumption of reactants and the concentration limit of reactant elements, the mass flow rate of flue gas, and the density of flue gas. This ensures that the reactor operates within the ash circulation range at the first volume threshold (achieving ultra-low emission levels, i.e., SO2 < 35 mg / Nm³). 3 NO x <50mg / Nm 3 Smoke and dust <10mg / Nm 3When the concentration of sulfur and nitrate pollutants at the reactor outlet in the ash circulation reaches a preset limit under the second volume threshold, or when the concentration of inactivated reaction elements reaches a preset limit.

[0042] S103 continuously monitors the ash storage volume in the current target ash hopper, and controls the addition of a quantitative amount of reactant to the ash circulation when the ash storage volume is less than the first volume threshold.

[0043] In this embodiment, the ash storage volume in the current target ash hopper is continuously monitored. In response to the ash storage volume being less than the first volume threshold, the reactor in the ash circulation reaches the standard operation, and the reactant is added to the humidifying mixer of the ash circulation, so that the ash circulation continues to operate.

[0044] S104, in response to the ash storage volume being greater than the second volume threshold, controls the discharge of ash from the target ash hopper.

[0045] In this embodiment of the application, the ash storage volume in the current target ash silo is continuously monitored. In response to the ash storage volume being greater than the second volume threshold, it is determined that the concentration of sulfur and nitrate pollutants at the reactor outlet in the ash cycle has reached a preset limit, or the concentration of reactive elements close to the inactivation threshold has reached a preset limit. The ash in the target ash silo is then discharged, and the ash cycle continues to operate.

[0046] It should be noted that, in the embodiments of this application, an external calcium-based removal agent can be used to remove SO2 and NO from the reactor inlet. x The calcium-sulfur (nitrate) molar ratio n (Ca / S(N)) and the effective utilization rate of the absorbent are used as the evaluation criteria for the economic efficiency of absorbent use. By adopting the above operating strategy and control logic, the actual calcium-sulfur molar ratio can be ≤1.2:1, the calcium-nitrogen molar ratio ≤0.6:1, and the effective utilization rate of the absorbent >83%. While ensuring high desulfurization and denitrification efficiency (desulfurization efficiency >92%, denitrification efficiency >85%), the goal of economical operation of the absorbent is achieved, resulting in an actual absorbent utilization rate of over 83%.

[0047] In this embodiment, a first volume threshold and a second volume threshold are determined based on a first attribute parameter and a second attribute parameter, wherein the second volume threshold is greater than the first volume threshold. The ash volume in the current target ash silo is continuously monitored. In response to the ash volume being less than the first threshold, reactant is added to the ash circulation; in response to the ash volume being greater than the second threshold, ash is discharged from the target ash silo. This embodiment can control the concentration of reactive elements in the circulating ash under equilibrium conditions, ensuring high desulfurization and denitrification efficiency while improving reactant utilization and avoiding resource waste.

[0048] Figure 3 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application, as follows: Figure 3 As shown, the method includes the following steps:

[0049] S301, obtain the first property parameters of the reactant and the second property parameters of the flue gas in the ash cycle.

[0050] For details regarding step S301, please refer to the relevant descriptions in the above embodiments; they will not be repeated here.

[0051] It should be noted that the first attribute parameters include the deactivation time of the reactant, the theoretical consumption of the reactant, and the concentration limit of the reactant; the second attribute parameters include the mass flow rate of the flue dust and the density of the flue dust.

[0052] S302, the first volume threshold is obtained based on the deactivation time of the reactant, the theoretical consumption of the reactant, the concentration limit of the reactant, the mass flow rate of the flue gas, and the density of the flue gas.

[0053] The first volume threshold is obtained using the following formula:

[0054]

[0055] Among them, V L G1 represents the first volume threshold, t represents the deactivation time of the reactant element, r represents the concentration limit of the reactant element (in percentage), ρ1 represents the soot density, G1 represents the soot mass flow rate (in kg / h), and G2 represents the theoretical consumption of the reactant (in kg / h).

[0056] In this embodiment, the reactant is a calcium-based desiccant, the reactant element is active calcium, and the soot is ash calcium, which is used as an example for illustration. In the ash cycle, the deactivation time of the reactant element is the deactivation time of the active calcium, the concentration limit of the reactant element is the concentration limit of the active calcium in the circulating ash when the ash is discharged, and the theoretical consumption of the reactant is the theoretical consumption of the calcium-based desiccant.

[0057] S303, the second volume threshold is obtained based on the first volume threshold, the soot mass flow rate, the deactivation time of the reactive elements, and the soot density.

[0058] In some implementations, the soot volumetric flow rate is obtained by multiplying the soot mass flow rate and the soot density. The soot increment volume is obtained by multiplying the soot volumetric flow rate and the deactivation time of the reactant element. A second volume threshold is obtained by summing the soot increment volume and a first volume threshold.

[0059] Alternatively, the second volume threshold can be obtained using the following formula:

[0060] V M =t*(G1 / ρ1)+V L

[0061] Among them, V MThe second volume threshold is defined in this embodiment of the application. The second volume threshold is less than the total volume of the gray silo, and the first volume threshold is less than the second volume threshold.

[0062] Optionally, in the embodiments of this application, there is V L =b*V M , where b is a coefficient, which can be between 0.1 and 0.7.

[0063] S304 continuously monitors the ash storage volume in the current target ash hopper, and controls the addition of reactant to the ash circulation when the ash storage volume is less than the first volume threshold.

[0064] S305, in response to the ash storage volume being greater than the second volume threshold, controls the discharge of ash from the target ash hopper.

[0065] For details regarding steps S304 to S305, please refer to the relevant descriptions in the above embodiments; they will not be repeated here.

[0066] In this embodiment, a first volume threshold is obtained based on the deactivation time of the reactant, the theoretical consumption of the reactant, the concentration limit of the reactant, the mass flow rate of the flue gas, and the density of the flue gas. A second volume threshold is then obtained based on the first volume threshold, the mass flow rate of the flue gas, the deactivation time of the reactant, and the density of the flue gas. This embodiment can control the concentration of reactant in the circulating ash under equilibrium conditions, ensuring high desulfurization and denitrification efficiency while improving the utilization rate of the reactant and avoiding resource waste.

[0067] Figure 4 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application, as follows: Figure 4 As shown, the method includes the following steps:

[0068] S401, obtain the first property parameters of the reactant and the second property parameters of the flue gas in the ash cycle.

[0069] S402, determine a first volume threshold and a second volume threshold based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold.

[0070] For details regarding steps S401 to S402, please refer to the description in the above embodiments, which will not be repeated here.

[0071] It should be noted that the reactant property parameters also include the reactant concentration and the reactant density.

[0072] S403 continuously monitors the ash storage volume in the current target ash bin, and in response to the ash storage volume being less than the first volume threshold, obtains the target quality based on the reactant addition concentration, reactant density, and the first volume threshold.

[0073] Alternatively, the target quality can be obtained using the following formula:

[0074] M=d*V L *ρ2

[0075] Where d represents the concentration of the added reactant, ρ2 represents the density of the reactant, and M represents the target mass.

[0076] Optionally, when the reactant is a calcium-based descaling agent, the concentration of the reactant can be 0.05-0.5.

[0077] S404, add the target mass of reactant to the ash cycle.

[0078] In some implementations, a target mass of reactant is added to the humidifying mixer of the ash circulation system, and the ash circulation continues to operate.

[0079] In this embodiment, the ash storage volume in the current target ash silo is continuously monitored. When the ash storage volume is less than a first volume threshold, a target mass is obtained based on the reactant concentration, reactant density, and the first volume threshold. The target mass of reactant is then added to the ash circulation system. This embodiment can control the concentration of reactive elements in the circulating ash under equilibrium conditions, ensuring high desulfurization and denitrification efficiency while improving reactant utilization and avoiding resource waste.

[0080] Figure 5 This is a flowchart of an embodiment of the ash circulation control method based on smoke and dust purification according to this application, as follows: Figure 5 As shown, the method includes the following steps:

[0081] S501, obtain the first property parameters of the reactant and the second property parameters of the flue gas in the ash cycle.

[0082] S502, determine a first volume threshold and a second volume threshold based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold.

[0083] S503 continuously monitors the ash storage volume in the current target ash hopper, and controls the addition of a quantitative amount of reactant to the ash circulation when the ash storage volume is less than the first volume threshold.

[0084] S504, in response to the ash storage volume being greater than the second volume threshold, controls the discharge of ash from the target ash hopper.

[0085] For details regarding steps S501 to S504, please refer to the above embodiments; they will not be repeated here.

[0086] S505, obtain the third volume threshold based on the product of the total volume of the target gray warehouse and the preset target gray warehouse volume coefficient.

[0087] In this embodiment of the application, the third volume threshold can be obtained using the following formula:

[0088] V H =a*V

[0089] Among them, V H V represents the third volume threshold, V represents the total volume of the target gray silo, and a represents the gray silo volume coefficient. The third volume threshold is greater than the second volume threshold and less than the total volume of the target gray silo.

[0090] Optionally, the target gray silo volume factor can be set to 0.7-0.95.

[0091] S506, in response to the ash storage volume exceeding the third volume threshold, stops the ash circulation and generates an alarm message.

[0092] If the ash storage volume exceeds a third volume threshold, indicating an operational abnormality in the current ash cycle, the ash cycle can be stopped and an alarm message generated. Optionally, the alarm message can be a light indicator or an audible alert; this application does not impose any limitations on this.

[0093] It should be noted that, in the embodiments of this application, the first volume threshold is the low material level of the ash silo, and the ash storage corresponding to its volume is the minimum limit to ensure that the system's ash-calcium circulation can start normally. The second volume threshold is the middle material level of the ash silo, that is, the process material level, and the system's ash-calcium circulation can operate normally within the ash storage corresponding to its volume. The third volume threshold is the high material level of the ash silo, and the ash storage corresponding to its volume is the safe upper limit of the material level.

[0094] In some implementations, the target ash bin is one of multiple candidate ash bins. When the ash stored in the target ash bin is discharged, in order to improve work efficiency, the target ash bin can be updated to the next candidate ash bin. The flue dust from the dust collector is connected to the updated target ash bin, and the above steps are continued until the ash storage volume is greater than the second volume threshold.

[0095] With only one ash silo, the concentration of active calcium in the circulating ash fluctuates between the middle and near-minimum values ​​due to time constraints for ash discharge and absorbent addition. Therefore, under the premise that other conditions remain unchanged, the presence of multiple ash silos in the ash circulation system can correspondingly improve the desulfurization and denitrification efficiency due to the increased concentration of active calcium in the absorbent.

[0096] like Figure 6As shown, taking two ash silos as an example, the operation process is as follows: Ash silos A and B operate alternately. When the ash in ash silo A reaches the second volume threshold, valves B1 and B2 are automatically opened by the program, and then valves A1 and A2 are automatically closed. Ash silo B starts working, and ash silo A begins discharging ash and adding reactants. When the material in ash silo B reaches the middle level, the next cycle begins. There can also be multiple ash silos; the operating mode is the same as the two-ash-silo operation scheme.

[0097] By adopting the optimized ash recycling system, the actual calcium-sulfur molar ratio can be ≤1.1:1, the calcium-nitrogen molar ratio can be ≤0.55:1, and the effective utilization rate of the absorbent can be >90%.

[0098] The embodiments of this application can control the concentration of reactive elements in the circulating ash under equilibrium conditions, ensuring high desulfurization and denitrification efficiency while improving the utilization rate of the reactants and avoiding waste of resources.

[0099] Figure 7 This is a structural diagram of an ash circulation control device based on smoke and dust purification according to an embodiment of the present disclosure, as shown below. Figure 7 As shown, the ash circulation control device 700 based on smoke and dust purification includes:

[0100] The acquisition module 710 is used to acquire the first property parameters of the reactants and the second property parameters of the flue gas in the ash cycle.

[0101] The determining module 720 is used to determine a first volume threshold and a second volume threshold based on a first attribute parameter and a second attribute parameter, wherein the second volume threshold is greater than the first volume threshold;

[0102] The control module 730 is used to continuously monitor the ash storage volume in the current target ash hopper, and in response to the ash storage volume being less than a first volume threshold, control the addition of reactant to the ash circulation; or in response to the ash storage volume being greater than a second volume threshold, control the discharge of ash from the target ash hopper.

[0103] In some implementations, the first attribute parameters include the deactivation time of the reactant, the theoretical consumption of the reactant, and the concentration limit of the reactant; the second attribute parameters include the mass flow rate of the flue gas and the density of the flue gas. The determining module 720 is also used for:

[0104] The first volume threshold is obtained based on the deactivation time of the reactant, the theoretical consumption of the reactant, the concentration limit of the reactant, the mass flow rate of the flue ash, and the density of the flue ash.

[0105] The second volume threshold is obtained based on the first volume threshold, the soot mass flow rate, the deactivation time of the reactive elements, and the soot density.

[0106] In some implementations, the determining module 720 is further configured to obtain the first volume threshold using the following formula:

[0107]

[0108] Among them, V L G1 represents the first volume threshold, t represents the deactivation time of the reactant element, r represents the concentration limit of the reactant element, ρ1 represents the soot density, G1 represents the soot mass flow rate, and G2 represents the theoretical consumption of the reactant.

[0109] In some implementations, the determining module 720 is further configured to:

[0110] The volumetric flow rate of the ash is obtained by multiplying the ash mass flow rate and the ash density.

[0111] The incremental volume of flue gas is obtained by multiplying the volumetric flow rate of flue gas and the deactivation time of the reactant elements.

[0112] The second volume threshold is obtained by summing the incremental volume of soot and the first volume threshold.

[0113] In some embodiments, the reactant property parameters also include reactant concentration and reactant density, and the control module 730 is further used for:

[0114] The target mass is obtained based on the reactant concentration, reactant density, and first volume threshold.

[0115] Add the target mass of reactant to the ash cycle.

[0116] In some implementations, when the total capacity of the target gray silo is greater than the second volume threshold, the control module 730 is further configured to:

[0117] The third volume threshold is obtained by multiplying the total volume of the target gray silo by the preset target gray silo volume coefficient.

[0118] The system continuously monitors the ash storage volume in the target ash bin. When the ash storage volume exceeds the third volume threshold, the ash circulation is stopped and an alarm message is generated.

[0119] In some implementations, the target gray silo is a gray silo among multiple candidate gray silos, and the control module 730 is further configured to:

[0120] Update the target ash bin to the next candidate ash bin, and connect the soot from the dust collector to the updated target ash bin until the ash storage volume is greater than the second volume threshold.

[0121] The embodiments of this application can control the concentration of reactive elements in the circulating ash under equilibrium conditions, ensuring high desulfurization and denitrification efficiency while improving the utilization rate of the reactants and avoiding waste of resources.

[0122] Based on the same concept, embodiments of this application also provide an electronic device.

[0123] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 8 As shown, the electronic device 800 includes a memory 801, a processor 802, and a computer program product stored in the memory 801 and capable of running on the processor 802. When the processor executes the computer program, it implements the aforementioned ash circulation control method based on smoke and dust purification.

[0124] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0125] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0126] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0127] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0128] Based on the same concept, embodiments of this application also provide a computer-readable storage medium storing computer instructions thereon, wherein the computer instructions are used to cause a computer to execute the ash circulation control method based on smoke and dust purification in the above embodiments.

[0129] Based on the same concept, this application also provides a computer program product, including a computer program that, when executed by a processor, provides the ash circulation control method based on smoke and dust purification described in the above embodiments.

[0130] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. This application can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0131] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0132] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0133] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A method for ash circulation control based on flue dust purification, characterized by, include: Obtain the first property parameters of the reactants and the second property parameters of the flue gas in the ash cycle; A first volume threshold and a second volume threshold are determined based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold. The first volume threshold is obtained using the following formula: wherein, represents the first volume threshold, t represents the reaction element deactivation time, represents the reaction element concentration limit, represents the soot density, represents the soot mass flow, represents the reaction agent theoretical consumption; Continuously monitor the ash storage volume in the current target ash silo, and in response to the ash storage volume being less than the first volume threshold, control the addition of the reactant to the ash circulation; or In response to the ash storage volume being greater than the second volume threshold, the ash stored in the target ash hopper is controlled to be discharged. The first attribute parameter includes the deactivation time of the reactant element, the theoretical consumption of the reactant, and the concentration limit of the reactant element; the second attribute parameter includes the mass flow rate of the flue gas and the density of the flue gas; and the determination of the first volume threshold and the second volume threshold based on the first attribute parameter and the second attribute parameter includes: A first volume threshold is obtained based on the deactivation time of the reactant, the theoretical consumption of the reactant, the concentration limit of the reactant, the mass flow rate of the flue ash, and the density of the flue ash. The volumetric flow rate of the flue dust is obtained by multiplying the mass flow rate of the flue dust and the density of the flue dust. The incremental volume of flue gas is obtained by multiplying the volumetric flow rate of the flue gas and the deactivation time of the reactive element. The second volume threshold is obtained by summing the incremental volume of the ash and the first volume threshold.

2. The method according to claim 1, characterized in that, The reactant property parameters also include reactant concentration and reactant density, and the control of adding the reactant to the ash cycle includes: The target mass is obtained based on the reactant concentration, the reactant density, and the first volume threshold. The target mass of the reactant is added to the ash cycle.

3. The method according to claim 1, characterized in that, The total capacity of the target gray silo is greater than the second volume threshold. After determining the first volume threshold and the second volume threshold based on the first attribute parameter and the second attribute parameter, the method further includes: The third volume threshold is obtained by multiplying the total volume of the target gray silo by the preset target gray silo volume coefficient. The system continuously monitors the ash storage volume in the current target ash hopper. In response to the ash storage volume exceeding the third volume threshold, the ash circulation is stopped and an alarm message is generated.

4. The method according to claim 1, characterized in that, The target gray silo is a gray silo among multiple candidate gray silos. After the control discharges the stored gray silo from the target gray silo, it also includes: The target ash bin is updated as the next candidate ash bin, and the soot from the dust collector is connected to the updated target ash bin until the ash storage volume is greater than the second volume threshold.

5. An ash circulation control device based on flue gas purification, employing the ash circulation control method based on flue gas purification as described in any one of claims 1-4, characterized in that, include: The acquisition module is used to acquire the first property parameters of the reactants and the second property parameters of the flue gas in the ash cycle. The determining module is used to determine a first volume threshold and a second volume threshold based on the first attribute parameter and the second attribute parameter, wherein the second volume threshold is greater than the first volume threshold; The control module is used to continuously monitor the ash storage volume in the current target ash hopper, and in response to the ash storage volume being less than the first volume threshold, control the addition of the reactant to the ash circulation; or in response to the ash storage volume being greater than the second volume threshold, control the discharge of the ash from the target ash hopper.

6. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-4.

7. A non-transitory computer-readable storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the steps of the method according to any one of claims 1-4.

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