Optimization method and device of flue gas circulation system, electronic equipment and storage medium

Abstract

The invention discloses an optimization method and device of a flue gas circulation system, electronic equipment and a storage medium, a flue gas recirculation system is started under the working condition of low-load operation of a boiler, flue gas is collected from an outlet flue of an induced draft fan and prevented from flowing back by means of a flue gas isolation module, and meanwhile, after the collected flue gas is pressurized by a flue gas recirculation fan module, the flue gas is discharged from the flue gas recirculation fan module. The flue gas is distributed to the inlet air duct of the primary fan through the flue gas distribution module to realize flue gas recirculation, so that the flue gas circulation state can be adjusted according to the combustion characteristics under low load, the problem of flue gas backflow when the system is shut down is effectively solved, the flue gas circulation path is optimized, and the energy consumption is reduced. The technical effects of improving the denitration efficiency under the low-load working condition, improving the utilization rate of the reducing agent and guaranteeing the operation safety and economical efficiency of the boiler are achieved.

Description

Technical Field

[0001] This disclosure relates to the field of boiler system retrofitting technology, and in particular to an optimization method and apparatus for a flue gas recirculation system, electronic equipment and storage medium. Background Technology

[0002] Boilers, as core equipment in thermal power generation and industrial heating systems, are widely used in energy, chemical, metallurgical and other fields. With increasingly stringent environmental regulations, the control of nitrogen oxide (NOx) emissions during boiler combustion has become a key focus of the industry.

[0003] Currently, the boiler denitrification control method directly adopts a fixed spray gun arrangement and a single flue gas recirculation path. When the boiler is running at low load, the decrease in combustion temperature will affect the denitrification efficiency. This denitrification control method may lead to a narrowing of the denitrification reaction window, low utilization rate of reducing agent, and backflow when the flue gas recirculation system is shut down, thereby affecting the safety and economy of boiler operation. Summary of the Invention

[0004] This disclosure provides a method, apparatus, electronic device, and storage medium for optimizing a flue gas recirculation system. Its main purpose is to address the problems of a narrowed denitrification reaction window, low reductant utilization, and flue gas backflow affecting boiler operation safety and economy when the flue gas recirculation system is shut down, caused by a decrease in combustion temperature during low-load boiler operation.

[0005] According to a first aspect of this disclosure, an optimization method for a flue gas recirculation system is provided, comprising:

[0006] In response to the boiler's low-load operation, the flue gas recirculation system is activated to collect flue gas from the induced draft fan outlet flue and prevent flue gas backflow through the flue gas isolation module.

[0007] The collected flue gas is pressurized by the flue gas recirculation fan module and then distributed to the primary fan inlet duct by the flue gas distribution module to achieve flue gas recirculation.

[0008] Optionally, the method further includes:

[0009] At least one spray gun is arranged in the inlet flue of the boiler separator. The arrangement of the spray gun is determined by numerical simulation based on the flue gas flow rate and NOx concentration data collected by the flue gas parameter monitoring module, so as to improve the mixing efficiency of the reducing agent and the flue gas.

[0010] The reducing agent injection rate of the spray gun is dynamically adjusted based on monitoring data and boiler load; wherein, the monitoring data is the NOx concentration data.

[0011] Optionally, the step of activating the flue gas recirculation system in response to the boiler's low-load operating condition, collecting flue gas from the induced draft fan outlet flue, and preventing flue gas backflow through the flue gas isolation module further includes:

[0012] When the boiler load changes, adjust the opening of the regulating valve of the flue gas recirculation fan and the control parameters of the spray gun.

[0013] Optionally, the step of pressurizing the collected flue gas through the flue gas recirculation fan module and then distributing it to the primary fan inlet duct via the flue gas distribution module to achieve flue gas recirculation includes:

[0014] The pressurized flue gas is distributed to at least two branches and sent into the inlet duct of the primary air fan.

[0015] Optionally, the branch is equipped with a baffle door, and the step of distributing the pressurized flue gas to at least two branches and sending them into the inlet duct of the primary air fan includes:

[0016] Based on the aforementioned baffle gate, the flue gas distribution path and distribution flow rate are determined.

[0017] According to a second aspect of this disclosure, an optimization device for a flue gas recirculation system is provided, comprising:

[0018] The response unit is used to respond to the low-load operation of the boiler by starting the flue gas recirculation system, collecting flue gas from the flue gas outlet of the induced draft fan, and preventing flue gas backflow through the flue gas isolation module.

[0019] The distribution unit is used to pressurize the collected flue gas through the flue gas recirculation fan module and then distribute it to the inlet duct of the primary fan through the flue gas distribution module to achieve flue gas recirculation.

[0020] Optionally, the device further includes:

[0021] The arrangement unit is used to arrange at least one spray gun in the inlet flue of the boiler separator. The arrangement position of the spray gun is determined by numerical simulation calculation based on the flue gas flow rate and NOx concentration data collected by the flue gas parameter monitoring module, so as to improve the mixing efficiency of the reducing agent and the flue gas.

[0022] The regulating unit is used to dynamically adjust the reducing agent injection amount of the spray gun according to the monitoring data and boiler load; wherein, the monitoring data is the NOx concentration data.

[0023] Optionally, the response unit is further configured to:

[0024] When the boiler load changes, adjust the opening of the regulating valve of the flue gas recirculation fan and the control parameters of the spray gun.

[0025] Optionally, the allocation unit is further configured to:

[0026] The pressurized flue gas is distributed to at least two branches and sent into the inlet duct of the primary air fan.

[0027] Optionally, the branch is equipped with a baffle gate, and the distribution unit is further used for:

[0028] Based on the aforementioned baffle gate, the flue gas distribution path and distribution flow rate are determined.

[0029] According to a third aspect of this disclosure, an electronic device is provided, comprising:

[0030] At least one processor; and

[0031] A memory communicatively connected to the at least one processor; wherein,

[0032] 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 described in the first aspect above.

[0033] According to a fourth aspect of this disclosure, a non-transitory computer-readable storage medium is provided storing computer instructions, wherein the computer instructions are configured to cause the computer to perform the method described in the first aspect above.

[0034] According to a fifth aspect of this disclosure, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the method described in the first aspect above.

[0035] The optimization method, apparatus, electronic equipment, and storage medium for the flue gas recirculation system disclosed herein mainly include: in response to the low-load operation of the boiler, starting the flue gas recirculation system, collecting flue gas from the induced draft fan outlet flue, and preventing flue gas backflow through the flue gas isolation module; pressurizing the collected flue gas through the flue gas recirculation fan module, and then distributing it to the primary air fan inlet duct through the flue gas distribution module to achieve flue gas recirculation. Compared with related technologies, the embodiments of this application start the flue gas recirculation system under low-load boiler operation conditions. Flue gas is collected from the induced draft fan outlet flue and backflow is prevented with the help of the flue gas isolation module. At the same time, the collected flue gas is pressurized by the flue gas recirculation fan module and distributed to the primary air fan inlet duct through the flue gas distribution module to achieve flue gas recirculation. This method can adjust the flue gas circulation state according to the combustion characteristics under low load and effectively solve the problem of flue gas backflow when the system is shut down. It optimizes the flue gas circulation path. Therefore, it can solve the technical problems of narrowing the denitrification reaction window, low reductant utilization rate and flue gas backflow affecting the boiler operation safety and economy when the flue gas recirculation system is shut down due to the decrease in combustion temperature during low-load boiler operation. It achieves the technical effects of improving denitrification efficiency under low-load conditions, increasing reductant utilization rate and ensuring boiler operation safety and economy.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0037] The accompanying drawings are provided to better understand this solution and do not constitute a limitation of this disclosure. Wherein:

[0038] Figure 1 This is a schematic flowchart illustrating an optimization method for a flue gas recirculation system provided in an embodiment of this disclosure.

[0039] Figure 2 A schematic diagram of the structure of an optimization device for a flue gas recirculation system provided in an embodiment of this disclosure;

[0040] Figure 3 A schematic diagram of the structure of an optimization device for a flue gas recirculation system provided in an embodiment of this disclosure;

[0041] Figure 4 A schematic block diagram of an example electronic device provided for embodiments of this disclosure. Detailed Implementation

[0042] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0043] The following description, with reference to the accompanying drawings, outlines an optimization method, apparatus, electronic device, and storage medium for a flue gas recirculation system according to embodiments of the present disclosure.

[0044] Figure 1 This is a schematic flowchart illustrating an optimization method for a flue gas recirculation system provided in an embodiment of this disclosure.

[0045] like Figure 1 As shown, the method includes the following steps:

[0046] Step 101: In response to the boiler's low-load operation, start the flue gas recirculation system, collect flue gas from the induced draft fan outlet flue, and prevent flue gas backflow through the flue gas isolation module.

[0047] The flue gas recirculation system operates in response to low-load boiler operation. The flue gas at the induced draft fan outlet flue has already undergone the action of the induced draft fan and possesses certain flow characteristics; collecting flue gas from here can better meet the needs of flue gas recirculation.

[0048] To prevent backflow of flue gas during system operation and ensure its smooth operation, a flue gas isolation module is installed during flue gas collection. This module prevents reverse flow of the collected flue gas when the flue gas recirculation system is running, ensuring that the collected flue gas flows smoothly along a preset path. This provides a stable source of flue gas for subsequent treatment and recycling, guaranteeing reliable start-up and stability of the entire flue gas recirculation system under low-load operating conditions.

[0049] Step 102: The collected flue gas is pressurized by the flue gas recirculation fan module and then distributed to the primary fan inlet duct by the flue gas distribution module to achieve flue gas recirculation.

[0050] When the boiler is operating at low load, after the flue gas recirculation system starts up and successfully collects flue gas from the induced draft fan outlet flue, the next step is to pressurize the collected flue gas appropriately through the flue gas recirculation fan module. The flue gas recirculation fan module is a low-pressure head, low-flow flue gas recirculation fan arranged in the subsequent path of the flue gas recirculation flue. Its function is to provide sufficient power for the collected flue gas so that it can flow smoothly in the subsequent flue.

[0051] After being pressurized by the flue gas recirculation fan module, the flue gas enters the flue gas distribution module. Specifically, the flue gas distribution module consists of two branches branching off from the flue gas recirculation fan outlet duct. These two branches connect to the inlet ducts of two primary air fans, and each branch is equipped with dampers. These dampers can adjust the amount of flue gas entering the corresponding primary air fan inlet duct according to actual needs, thereby achieving reasonable distribution of the flue gas. In this way, the pressurized and distributed flue gas can smoothly enter the primary air fan inlet duct and participate in the subsequent flue gas recirculation process. That is, after being pressurized by the primary air fan and heated by the air preheater, it enters the primary air chamber, then flows as fluidizing air through the air distributor and air cap into the furnace, finally completing the flue gas recirculation process. This process can effectively utilize part of the flue gas, optimize the boiler's operating conditions under low load, and create favorable conditions for subsequent related treatments (such as denitrification).

[0052] The optimization method for the flue gas recirculation system provided in this disclosure mainly includes the following technical solutions: in response to the low-load operation of the boiler, the flue gas recirculation system is started, flue gas is collected from the flue gas outlet of the induced draft fan, and the flue gas backflow is prevented through the flue gas isolation module; the collected flue gas is pressurized through the flue gas recirculation fan module and then distributed to the inlet duct of the primary air fan through the flue gas distribution module to realize flue gas recirculation. Compared with related technologies, the embodiments of this application start the flue gas recirculation system under low-load boiler operation conditions. Flue gas is collected from the induced draft fan outlet flue and backflow is prevented with the help of the flue gas isolation module. At the same time, the collected flue gas is pressurized by the flue gas recirculation fan module and distributed to the primary air fan inlet duct through the flue gas distribution module to achieve flue gas recirculation. This method can adjust the flue gas circulation state according to the combustion characteristics under low load and effectively solve the problem of flue gas backflow when the system is shut down. It optimizes the flue gas circulation path. Therefore, it can solve the technical problems of narrowing the denitrification reaction window, low reductant utilization rate and flue gas backflow affecting the boiler operation safety and economy when the flue gas recirculation system is shut down due to the decrease in combustion temperature during low-load boiler operation. It achieves the technical effects of improving denitrification efficiency under low-load conditions, increasing reductant utilization rate and ensuring boiler operation safety and economy.

[0053] In some embodiments, the method further includes:

[0054] At least one spray gun is arranged in the inlet flue of the boiler separator. The arrangement of the spray gun is determined by numerical simulation based on the flue gas flow rate and NOx concentration data collected by the flue gas parameter monitoring module, so as to improve the mixing efficiency of the reducing agent and the flue gas.

[0055] The reducing agent injection rate of the spray gun is dynamically adjusted based on monitoring data and boiler load; wherein, the monitoring data is the NOx concentration data.

[0056] During boiler operation, to further improve denitrification efficiency, especially to ensure effective NOx emission control under low-load operating conditions, at least one spray gun needs to be appropriately arranged in the boiler separator inlet flue. The boiler separator is a crucial component in the boiler system for separating solid particles from flue gas, and the flue gas flow state and NOx concentration distribution within its inlet flue directly affect the efficiency of the denitrification reaction. The main function of the spray gun is to inject a reducing agent into the flue to chemically react with NOx in the flue gas, thereby reducing NOx emissions.

[0057] The flue gas parameter monitoring module collects real-time data on flue gas flow rate and NOx concentration in the separator inlet flue. Flue gas flow rate reflects the velocity and volume of the flue gas within the flue, while NOx concentration data shows the NOx content at different locations. By performing detailed numerical simulations on this collected data, the flow trajectory, mixing conditions, and NOx distribution patterns of the flue gas in the separator inlet flue can be simulated. Based on these simulation results, the specific placement of the spray guns can be determined, ensuring that the reducing agent sprayed from the guns can maximize contact and thorough mixing with the NOx in the flue gas. This significantly improves the mixing efficiency between the reducing agent and the flue gas, ensuring the complete denitrification reaction and reducing unnecessary consumption of the reducing agent, thus achieving rational resource utilization.

[0058] After the spray guns are installed, the amount of reducing agent injected by the spray guns needs to be dynamically adjusted according to the monitoring data and boiler load. The monitoring data mainly refers to the NOx concentration data.

[0059] Changes in boiler load directly affect the amount of flue gas generated, its velocity, and the amount of NOx produced. The NOx concentration in the flue gas duct also changes when the boiler is under different load conditions. Real-time monitoring of NOx concentration data allows for timely understanding of the current NOx content in the flue gas. Based on boiler load information, the amount of reducing agent injected into the spray guns is dynamically adjusted. When the NOx concentration is high, the amount of reducing agent injected is appropriately increased to ensure sufficient reducing agent reacts with the NOx; when the NOx concentration is low, the amount of reducing agent injected is reduced accordingly to avoid wasting reducing agent. This dynamic adjustment method can ensure that NOx emissions are controlled within the target range (e.g., below 50 mg / Nm3 under low-load combustion) while achieving precise reducing agent delivery, further improving the economy and efficiency of the denitrification system.

[0060] In some embodiments, the step of activating the flue gas recirculation system in response to a low-load boiler operation condition, collecting flue gas from the induced draft fan outlet flue, and preventing flue gas backflow through a flue gas isolation module further includes:

[0061] When the boiler load changes, adjust the opening of the regulating valve of the flue gas recirculation fan and the control parameters of the spray gun.

[0062] The regulating damper of the flue gas recirculation fan is located at the fan inlet, and its opening directly affects the amount of flue gas drawn from the induced draft fan outlet flue. When the boiler load changes, the combustion conditions, flue gas generation, and flow characteristics within the furnace will also change. By adjusting the opening of the regulating damper, the amount of flue gas entering the flue gas recirculation system can be precisely controlled to match the boiler's operating requirements under the current load. For example, when the load decreases, it may be necessary to adjust the regulating damper opening appropriately to change the flue gas recirculation volume, thereby optimizing the fluidization state and temperature field distribution within the furnace and creating a stable environment for subsequent denitrification reactions. Conversely, when the load increases, the damper can be adjusted in the opposite direction according to the actual situation to ensure that the flue gas recirculation system functions effectively without adversely affecting the normal combustion of the boiler.

[0063] As a key component in the SNCR denitrification system for injecting reducing agents, the spray gun's control parameters, including the injection pressure and angle of the reducing agent, directly affect the mixing effect and reaction efficiency between the reducing agent and NOx in the flue gas. When the boiler load changes, the flow rate, velocity, and NOx concentration of the flue gas in the separator inlet duct all change. Therefore, the control parameters of the spray gun need to be dynamically adjusted based on these changes. For example, when a load change leads to an increase in flue gas flow, it may be necessary to adjust the spray pressure of the spray gun to increase the injection range and penetration of the reducing agent, ensuring that the reducing agent can be fully mixed with the rapidly flowing flue gas. If the NOx concentration increases due to load fluctuations, parameters such as the injection angle can be optimized to allow the reducing agent to more accurately cover high-concentration areas, improving the targeting and effectiveness of the denitrification reaction. This ensures that NOx emissions are controlled within the target range under different load conditions, while effectively reducing the consumption of reducing agents.

[0064] In some embodiments, the step of pressurizing the collected flue gas through a flue gas recirculation fan module and then distributing it to the primary fan inlet duct via a flue gas distribution module to achieve flue gas recirculation includes:

[0065] The pressurized flue gas is distributed to at least two branches and sent into the inlet duct of the primary air fan.

[0066] After the collected flue gas is appropriately pressurized by the flue gas recirculation fan module, in order to achieve reasonable distribution and efficient recycling of the flue gas, a flue gas distribution module is needed to guide the pressurized flue gas into at least two branches. These branches then send the flue gas into the corresponding primary air fan inlet duct. Specifically, the flue gas distribution module is a branch structure branching off from the flue gas recirculation fan outlet duct. Each branch is responsible for delivering a portion of the pressurized flue gas to a specific primary air fan inlet duct.

[0067] Each branch line connects to the inlet duct of a primary air fan. This design ensures that flue gas enters each primary air fan evenly and stably, avoiding uneven flue gas distribution caused by a single branch line. This guarantees a balanced load on subsequent primary air fans during pressurization, reducing equipment operating pressure. Simultaneously, each branch line is equipped with dampers. These dampers can flexibly adjust the flue gas flow rate in the corresponding branch line according to actual operating needs, further optimizing the distribution ratio of flue gas among the branches. This ensures that the amount of flue gas supplied to the inlet duct of each primary air fan matches the fan's operating parameters and the boiler's current operating conditions.

[0068] When the pressurized flue gas enters the primary air fan inlet duct through these branches, it mixes with the air drawn in by the primary air fan. The mixture is then pressurized again by the primary air fan and enters the air preheater for heating. The heated mixture then enters the primary air chamber and finally, as fluidizing air, passes through the air distributor and air cap into the furnace to participate in the fluidization and combustion processes, thus completing the entire flue gas recirculation process. This multi-branch distribution method effectively improves the stability and reliability of flue gas recirculation, ensuring that the recirculated flue gas participates evenly in the boiler's combustion system. This provides strong support for optimizing boiler operation under low load conditions and lays a good foundation for subsequent denitrification and other co-treatment processes.

[0069] In some embodiments, the branch is equipped with a baffle door, and the step of distributing the pressurized flue gas to at least two branches and sending them into the inlet duct of the primary air fan includes:

[0070] Based on the aforementioned baffle gate, the flue gas distribution path and distribution flow rate are determined.

[0071] A damper is an adjustable valve device that can precisely control the flow of flue gas within a branch by changing its opening degree.

[0072] The opening and closing of the damper directly determines whether flue gas can enter the primary air fan inlet duct through the corresponding branch. When the damper on a branch is open, the pressurized flue gas can flow smoothly along that branch and eventually enter the primary air fan inlet duct connected to that branch. If the damper is closed, the flue gas cannot pass through that branch, thus achieving selective control of the flue gas flow path. This ensures that the flue gas can enter the target primary air fan inlet duct according to the preset path, avoiding leakage or cross-flow of flue gas on unexpected paths and ensuring the accuracy of flue gas distribution.

[0073] The opening degree of the damper is positively correlated with the flue gas flow rate in the branch. When it is necessary to increase the flue gas flow rate in a branch, the opening degree of the damper on that branch can be increased to reduce the flow resistance of the flue gas in that branch, allowing more pressurized flue gas to pass through that branch. Conversely, if it is necessary to reduce the flue gas flow rate in a branch, the opening degree of the damper should be decreased to increase the flow resistance, thereby reducing the flue gas flow rate in that branch. By adjusting the opening degree of the dampers on each branch separately, the flue gas distribution ratio of each branch can be flexibly adjusted according to factors such as the operating requirements of the two primary air fans, the current load conditions of the boiler, and the fluidization state in the furnace. This ensures that the amount of flue gas supplied to the inlet duct of each primary air fan is within a reasonable range, which not only meets the requirements of subsequent pressurization of the primary air fan and heating of the air preheater, but also ensures a stable supply of fluidizing air in the furnace. This achieves efficient and stable operation of flue gas recirculation, providing strong support for optimizing the overall operation of the boiler.

[0074] Corresponding to the above-described method for optimizing a flue gas recirculation system, this invention also proposes an optimization device for a flue gas recirculation system. Since the device embodiments of this invention correspond to the method embodiments described above, details not disclosed in the device embodiments can be referred to in the method embodiments described above, and will not be repeated here.

[0075] Figure 2 This is a schematic diagram of the structure of an optimization device for a flue gas recirculation system provided in an embodiment of this disclosure, as shown below. Figure 2 As shown, it includes:

[0076] Response unit 21 is used to respond to the low load operation of the boiler, start the flue gas recirculation system, collect flue gas from the induced draft fan outlet flue, and prevent flue gas backflow through the flue gas isolation module;

[0077] The distribution unit 22 is used to pressurize the collected flue gas through the flue gas recirculation fan module and then distribute it to the inlet duct of the primary fan through the flue gas distribution module to achieve flue gas recirculation.

[0078] The optimization device for the flue gas recirculation system provided in this disclosure mainly includes the following technical solutions: in response to the low-load operation of the boiler, the flue gas recirculation system is started, flue gas is collected from the flue gas outlet of the induced draft fan, and the flue gas backflow is prevented through the flue gas isolation module; the collected flue gas is pressurized through the flue gas recirculation fan module and then distributed to the inlet duct of the primary air fan through the flue gas distribution module to realize flue gas recirculation. Compared with related technologies, the embodiments of this application start the flue gas recirculation system under low-load boiler operation conditions. Flue gas is collected from the induced draft fan outlet flue and backflow is prevented with the help of the flue gas isolation module. At the same time, the collected flue gas is pressurized by the flue gas recirculation fan module and distributed to the primary air fan inlet duct through the flue gas distribution module to achieve flue gas recirculation. This method can adjust the flue gas circulation state according to the combustion characteristics under low load and effectively solve the problem of flue gas backflow when the system is shut down. It optimizes the flue gas circulation path. Therefore, it can solve the technical problems of narrowing the denitrification reaction window, low reductant utilization rate and flue gas backflow affecting the boiler operation safety and economy when the flue gas recirculation system is shut down due to the decrease in combustion temperature during low-load boiler operation. It achieves the technical effects of improving denitrification efficiency under low-load conditions, increasing reductant utilization rate and ensuring boiler operation safety and economy.

[0079] Furthermore, in one possible implementation of the embodiments of this disclosure, such as Figure 3 As shown, the device further includes:

[0080] Arrangement unit 23 is used to arrange at least one spray gun in the inlet flue of the boiler separator. The arrangement position of the spray gun is determined by numerical simulation calculation based on the flue gas flow rate and NOx concentration data collected by the flue gas parameter monitoring module, so as to improve the mixing efficiency of the reducing agent and the flue gas.

[0081] The regulating unit 24 is used to dynamically adjust the reducing agent injection amount of the spray gun according to the monitoring data and boiler load; wherein, the monitoring data is the NOx concentration data.

[0082] Furthermore, in one possible implementation of this disclosure, the response unit 21 is further configured to:

[0083] When the boiler load changes, adjust the opening of the regulating valve of the flue gas recirculation fan and the control parameters of the spray gun.

[0084] Furthermore, in one possible implementation of this disclosure, the allocation unit 22 is further configured to:

[0085] The pressurized flue gas is distributed to at least two branches and sent into the inlet duct of the primary air fan.

[0086] Furthermore, in one possible implementation of this embodiment, the branch is provided with a baffle gate, and the distribution unit 22 is further configured to:

[0087] Based on the aforementioned baffle gate, the flue gas distribution path and distribution flow rate are determined.

[0088] It should be noted that the foregoing explanation of the method embodiments also applies to the apparatus of the embodiments of this disclosure, and the principle is the same. Therefore, the embodiments of this disclosure are not limited thereto.

[0089] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0090] Figure 4 A schematic block diagram of an example electronic device 300 that can be used to implement embodiments of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0091] like Figure 4 As shown, device 300 includes a computing unit 301, which can perform various appropriate actions and processes based on a computer program stored in ROM (Read-Only Memory) 302 or a computer program loaded from storage unit 308 into RAM (Random Access Memory) 303. RAM 303 can also store various programs and data required for the operation of device 300. The computing unit 301, ROM 302, and RAM 303 are interconnected via bus 304. I / O (Input / Output) interface 305 is also connected to bus 304.

[0092] Multiple components in device 300 are connected to I / O interface 305, including: input unit 306, such as keyboard, mouse, etc.; output unit 307, such as various types of monitors, speakers, etc.; storage unit 308, such as disk, optical disk, etc.; and communication unit 309, such as network card, modem, wireless transceiver, etc. Communication unit 309 allows device 300 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0093] The computing unit 301 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 301 include, but are not limited to, CPUs (Central Processing Units), GPUs (Graphics Processing Units), various special-purpose AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, DSPs (Digital Signal Processors), and any suitable processor, controller, microcontroller, etc. The computing unit 301 performs the various methods and processes described above, such as optimization methods for flue gas recirculation systems. For example, in some embodiments, the optimization methods for flue gas recirculation systems can be implemented as computer software programs tangibly contained in a machine-readable medium, such as storage unit 308. In some embodiments, part or all of the computer program can be loaded and / or installed on device 300 via ROM 302 and / or communication unit 309. When the computer program is loaded into RAM 303 and executed by the computing unit 301, one or more steps of the methods described above can be performed. Alternatively, in other embodiments, the computing unit 301 may be configured to perform the aforementioned optimization method for the flue gas recirculation system by any other suitable means (e.g., by means of firmware).

[0094] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application-Specific Standard Products), SOCs (System-on-Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0095] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0096] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, RAM, ROM, EPROM (Electrically Programmable Read-Only Memory) or flash memory, optical fiber, CD-ROM (Compact Disc Read-Only Memory), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0097] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0098] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication (e.g., communication networks) of any form or medium. Examples of communication networks include LANs (Local Area Networks), WANs (Wide Area Networks), the Internet, and blockchain networks.

[0099] Computer systems can include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. A server can be a cloud server, also known as a cloud computing server or cloud host, a hosting product within the cloud computing service system that addresses the management difficulties and weak business scalability inherent in traditional physical hosts and VPS (Virtual Private Server) services. Servers can also be servers for distributed systems or servers integrated with blockchain technology.

[0100] It's important to note that artificial intelligence (AI) is the study of enabling computers to simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, and planning). It encompasses both hardware and software technologies. AI hardware technologies generally include sensors, dedicated AI chips, cloud computing, distributed storage, and big data processing. AI software technologies primarily include computer vision, speech recognition, natural language processing, machine learning / deep learning, big data processing, and knowledge graph technologies.

[0101] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0102] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An optimization method for a flue gas recirculation system, characterized in that, include: In response to the boiler's low-load operation, the flue gas recirculation system is activated to collect flue gas from the induced draft fan outlet flue and prevent flue gas backflow through the flue gas isolation module. The collected flue gas is pressurized by the flue gas recirculation fan module and then distributed to the primary fan inlet duct by the flue gas distribution module to achieve flue gas recirculation.

2. The optimization method for the flue gas recirculation system according to claim 1, characterized in that, The method further includes: At least one spray gun is arranged in the inlet flue of the boiler separator. The arrangement of the spray gun is determined by numerical simulation based on the flue gas flow rate and NOx concentration data collected by the flue gas parameter monitoring module, so as to improve the mixing efficiency of the reducing agent and the flue gas. The reducing agent injection rate of the spray gun is dynamically adjusted based on monitoring data and boiler load; wherein, the monitoring data is the NOx concentration data.

3. The optimization method for the flue gas recirculation system according to claim 1, characterized in that, The method of activating the flue gas recirculation system in response to low-load boiler operation, collecting flue gas from the induced draft fan outlet flue, and preventing flue gas backflow through the flue gas isolation module also includes: When the boiler load changes, adjust the opening of the regulating valve of the flue gas recirculation fan and the control parameters of the spray gun.

4. The optimization method for the flue gas recirculation system according to claim 1, characterized in that, The process of pressurizing the collected flue gas through the flue gas recirculation fan module and then distributing it to the primary fan inlet duct via the flue gas distribution module to achieve flue gas recirculation includes: The pressurized flue gas is distributed to at least two branches and sent into the inlet duct of the primary air fan.

5. The optimization method for the flue gas recirculation system according to claim 4, characterized in that, The branch is equipped with a baffle door, and the process of distributing the pressurized flue gas to at least two branch lines and sending them into the inlet duct of the primary air fan includes: Based on the aforementioned baffle gate, the flue gas distribution path and distribution flow rate are determined.

6. An optimization device for a flue gas recirculation system, characterized in that, include: The response unit is used to respond to the low-load operation of the boiler by starting the flue gas recirculation system, collecting flue gas from the flue gas outlet of the induced draft fan, and preventing flue gas backflow through the flue gas isolation module. The distribution unit is used to pressurize the collected flue gas through the flue gas recirculation fan module and then distribute it to the inlet duct of the primary fan through the flue gas distribution module to achieve flue gas recirculation.

7. The optimization device for the flue gas recirculation system according to claim 6, characterized in that, The device further includes: The arrangement unit is used to arrange at least one spray gun in the inlet flue of the boiler separator. The arrangement position of the spray gun is determined by numerical simulation calculation based on the flue gas flow rate and NOx concentration data collected by the flue gas parameter monitoring module, so as to improve the mixing efficiency of the reducing agent and the flue gas. The regulating unit is used to dynamically adjust the reducing agent injection amount of the spray gun according to the monitoring data and boiler load; wherein, the monitoring data is the NOx concentration data.

8. An electronic device, characterized in that, include: 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 1-5.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to perform the method according to any one of claims 1-5.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method according to any one of claims 1-5.

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