Method, device, equipment and medium for preventing explosion of dry dust removal system of converter

Abstract

The application discloses a method, device, equipment and medium for preventing deflagration of a converter dry dedusting system, and belongs to the technical field of metallurgy. The method comprises the following steps: if an oxygen opening signal of an oxygen lance of a converter is received, the oxygen blowing amount of the oxygen lance is acquired; according to the oxygen blowing amount, the purging parameters of nitrogen are determined, the purging parameters comprising a purging flow, a purging pressure and a purging time; and the nitrogen purging system is controlled to purge nitrogen into a target flue gas pipeline in the dry dedusting system according to the purging parameters; wherein the length of the flue gas pipeline between the gas outlet of the nitrogen purging system and the furnace mouth of the converter is greater than a preset length threshold. According to the oxygen blowing amount of the oxygen lance of the converter, the purging parameters of nitrogen are determined, nitrogen is purged into the target flue gas pipeline of the dry dedusting system according to the purging parameters, O2, H2 and CO and other gases in the flue gas entering the electrostatic precipitator are effectively diluted by nitrogen, the mixing ratio of explosive gases is reduced, and the risk of deflagration is reduced.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and in particular to a method, apparatus, equipment and medium for preventing deflagration in a converter dry dust removal system. Background Technology

[0002] The large amount of high-temperature flue gas generated during the converter smelting process is cooled and dusted by a dry dust removal system and then recycled. This dry dust removal system includes an electrostatic precipitator (ESP). The ESP works by releasing high-voltage positive and negative electrons within an electric field, causing the dust particles in the flue gas to remain trapped within the electric field, thus achieving dust removal and purification. However, when the mixing ratio of components such as O2, H2, and CO in the flue gas reaches a deflagration level, a deflagration accident can occur when the flue gas encounters an electric spark.

[0003] In existing technologies, the contents of O2, H2 and CO in flue gas are monitored. When the O2 content is greater than 4% and the combustibility ratio of CO and H2 is close to the explosion threshold, the converter is immediately controlled to stop blowing.

[0004] However, this control method requires stopping the converter from blowing, which affects the stability of the converter's operation. Summary of the Invention

[0005] In view of the above problems, this application is made to provide a method, apparatus, equipment and medium for preventing deflagration in a converter dry dust removal system. The nitrogen purging parameters can be determined based on the oxygen blowing rate of the converter oxygen lance. By purging nitrogen into the flue gas duct of the dry dust removal system using these parameters, the nitrogen effectively dilutes gases such as O2, H2 and CO in the flue gas, reducing the mixing ratio of explosive gases, lowering the risk of deflagration, and improving the safety of the dry dust removal system and the stability of converter operation.

[0006] In a first aspect, this application provides a method for preventing deflagration in a converter dry dust removal system, the method comprising: If an oxygen lance start signal is received from the converter oxygen lance, the oxygen blowing rate of the oxygen lance is obtained. Based on the oxygen blowing volume, the nitrogen purging parameters are determined, including the purging flow rate, purging pressure, and purging time. The nitrogen purging system is controlled to purge nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters. Wherein, the length of the flue gas duct between the outlet of the nitrogen purging system and the furnace opening of the converter is greater than a preset length threshold, and the target flue gas duct is the flue gas duct between the furnace opening of the converter and the electrostatic precipitator.

[0007] Optionally, determining the nitrogen purging parameters based on the oxygen blowing rate includes: The carbon monoxide and hydrogen content in the flue gas at the furnace opening were obtained; The nitrogen purging flow rate is determined based on the oxygen blowing rate, the carbon monoxide content, and the hydrogen content. The oxygen blowing rate, carbon monoxide content, and hydrogen content are all positively correlated with the purging flow rate.

[0008] Optionally, determining the nitrogen purging flow rate based on the oxygen blowing rate, the carbon monoxide content, and the hydrogen content includes: Determine the initial flow rates corresponding to the oxygen blowing rate, the carbon monoxide content, and the hydrogen content; Obtain the temperature of the flue gas inside the electrostatic precipitator in the dry dust removal system; Determine the correction factor for the purging flow rate corresponding to the temperature; The product of the correction factor and the initial flow rate is taken as the purging flow rate of the nitrogen gas.

[0009] Optionally, determining the nitrogen purging parameters based on the oxygen blowing rate includes: Obtain the tonnage of the converter; The purging time of nitrogen is determined based on the oxygen blowing volume and the tonnage. The oxygen blowing volume and the tonnage are both positively correlated with the purging time.

[0010] Optionally, the length threshold is determined based on the furnace temperature of the converter, and the length threshold is positively correlated with the furnace temperature.

[0011] Optionally, the nitrogen purging system includes a nitrogen source, a purging device, and a main gas source pipe. The purging device includes a nozzle, a gas source branch pipe, and a gas source ring pipe. The number of gas source branch pipes and nozzles is at least three. One end of each gas source branch pipe is connected to the gas source ring pipe, and the other end of each gas source branch pipe is connected to a nozzle and faces the center of the gas source ring pipe. The connection points of all gas source branch pipes and the gas source ring pipe are evenly distributed in the circumferential direction of the gas source ring pipe. One end of the main gas source pipe is connected to the nitrogen source, and the other end of the main gas source pipe is connected to the gas source ring pipe. In the dry dust removal system, an air inlet is provided on the flue gas duct, and the air source branch pipe is inserted into the flue gas duct through the air inlet.

[0012] Optionally, the outlet of the nozzle is oriented in the same direction as the flue gas flow direction in the flue gas duct.

[0013] Secondly, this application provides a device for preventing deflagration in a converter dry dust removal system, the device comprising: The acquisition module is used to acquire the oxygen blowing volume of the oxygen lance if it receives an oxygen-starting signal from the converter oxygen lance. The determining module is used to determine the nitrogen purging parameters based on the oxygen blowing volume, wherein the purging parameters include purging flow rate, purging pressure and purging time; The control module is used to control the nitrogen purging system to purge nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters. Wherein, the length of the flue gas duct between the outlet of the nitrogen purging system and the furnace opening of the converter is greater than a preset length threshold, and the target flue gas duct is the flue gas duct between the furnace opening of the converter and the electrostatic precipitator.

[0014] Thirdly, this application provides an electronic device, including: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method as described in the first aspect.

[0015] Fourthly, this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the method described in the first aspect.

[0016] The technical solutions provided in this application embodiment have at least the following technical effects or advantages: This application provides a method, apparatus, equipment, and medium for preventing deflagration in a converter dry dust removal system. Upon receiving an oxygen lance activation signal, the oxygen lance's blowing rate is acquired, meaning the oxygen lance's blowing rate is acquired at the start of converter smelting. Based on the blowing rate, nitrogen purging parameters are determined to match the unreacted oxygen. These parameters include purging flow rate, purging pressure, and purging time. The nitrogen purging system is controlled to blow nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters. The nitrogen dilutes the explosive gases in the flue gas, reducing the explosive gas mixing ratio below the deflagration ratio. Furthermore, the length of the flue gas duct between the outlet of the nitrogen purging system and the converter's furnace opening is greater than a preset length threshold. This method determines the nitrogen purging parameters based on the oxygen blowing rate of the converter oxygen lance. By purging nitrogen into the target flue gas duct of the dry dust removal system using these parameters, the nitrogen effectively dilutes gases such as O2, H2, and CO in the flue gas entering the electrostatic precipitator, reducing the risk of deflagration and improving the safety of the dry dust removal system and the stability of converter operation.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a flowchart illustrating a method for preventing deflagration in a converter dry dust removal system, as provided in an embodiment of this application. Figure 2 This is a front view of a nitrogen purging system structure provided in an embodiment of this application; Figure 3 This is a top view of a nitrogen purging system structure provided in an embodiment of this application; Figure 4 This is a structural block diagram of a device for preventing deflagration in a converter dry dust removal system, provided in an embodiment of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. Unless otherwise specified, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0020] Figure 1 This is a flowchart illustrating a method for preventing deflagration in a converter dry dust removal system, as provided in an embodiment of this application. Figure 1 As shown, the method includes: Step S110: If an oxygen lance start signal is received from the converter oxygen lance, the oxygen blowing rate of the oxygen lance is obtained.

[0021] In this embodiment, the converter dry dust removal system is responsible for handling the flue gas generated during the converter smelting process. The large amount of high-temperature flue gas generated during the converter smelting process reaches a temperature of 1500℃-1600℃ at the converter mouth. After being cooled to 800℃-1000℃ through a vaporization cooling flue, it enters an evaporative cooler, which further cools the flue gas to approximately 300℃. Then, it enters an electrostatic precipitator for fine dust removal. Under the suction force of an axial flow fan, the qualified gas from the silencer and switching station is cooled to 72℃ by a gas cooler before being sent to the gas holder. Unqualified gas is ignited and released through the chimney.

[0022] When the converter starts blowing, the oxygen lance is lowered and an oxygen-start signal is triggered, causing the lance to begin supplying oxygen into the converter. At this time, a large amount of pure oxygen is injected into the surface of the molten iron in the converter pool, reacting with the carbon in the molten iron to produce carbon monoxide, which is then released into the flue gas. In the early stages of smelting, the reaction between oxygen and molten iron in the converter is incomplete. When carbon monoxide in the flue gas mixes with unreacted oxygen and other gases, an explosive gas is formed. If the flue gas reaches the deflagration ratio when it is drawn into the flue gas duct by the dust removal fan and enters the electrostatic precipitator, a deflagration accident may occur when it encounters a spark in the electric field. Therefore, when the converter starts blowing, if an oxygen-start signal is received, it indicates that the converter has entered the initial stage of blowing. The amount of oxygen blown by the oxygen lance in the initial stage of blowing is then recorded, and the amount of oxygen blown indirectly reflects the amount of oxygen that has not completely reacted with carbon.

[0023] Step S120: Determine the nitrogen purging parameters based on the oxygen blowing rate.

[0024] The purging parameters include purging flow rate, purging pressure, and purging time.

[0025] In the embodiments of this application, the reaction between oxygen and molten iron is incomplete in the early stage of smelting. The more oxygen is blown, the more oxygen will not react completely with carbon. Therefore, the amount of oxygen blown can indirectly reflect the amount of oxygen that has not reacted completely with carbon. Thus, the purging parameters of nitrogen can be determined based on the amount of oxygen that has not reacted completely with carbon. However, the amount of oxygen that has not reacted completely with carbon in the converter is difficult to measure. Therefore, the amount of oxygen blown indirectly reflects the amount of oxygen that has not reacted completely with carbon. Thus, the purging parameters of nitrogen can be determined based on the amount of oxygen blown, so that the purging parameters match the amount of oxygen that has not reacted completely with carbon.

[0026] Step S130: Control the nitrogen purging system to purge nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters.

[0027] In this embodiment, upon receiving the oxygen lance activation signal from the converter, the purging valve is opened, the nitrogen purging system is quickly started, and nitrogen is purged into the target flue gas duct of the dry dust removal system according to the purging parameters. This allows for the management of explosive gases generated during the initial blowing stage when the oxygen and molten iron in the furnace do not react completely. The explosive gases flowing into the target flue gas duct are diluted with nitrogen, and the purging parameters are determined based on the oxygen blowing rate, ensuring that the proportion of explosive gases is diluted below the explosion threshold. This prevents the flue gas entering the electrostatic precipitator from exploding when it encounters an electric spark, significantly shortening the explosion window, reducing the risk of deflagration, ensuring the stability of converter operation, and improving the safety of the dry dust removal system.

[0028] Moreover, purging will stop once the purging time is reached. At this point, the converter has moved from the initial purging stage to the middle purging stage. The oxygen and molten iron in the furnace will react more completely, and there will be very little unreacted oxygen. Therefore, purging is only performed in the initial smelting stage, and purging can be stopped after the initial stage.

[0029] The length of the flue gas duct between the outlet of the nitrogen purging system and the furnace opening of the converter is a preset threshold. The flue gas duct where the outlet of the nitrogen purging system is located is the target flue gas duct, and the flue gas in the target flue gas duct finally flows to the electrostatic precipitator. That is, the target flue gas duct is the flue gas duct between the furnace opening of the converter and the electrostatic precipitator.

[0030] Optionally, the length threshold is determined based on the converter temperature, and the length threshold is positively correlated with the furnace temperature.

[0031] In this embodiment, the converter has a high temperature, resulting in a high temperature of the discharged flue gas. This high temperature flue gas affects the dilution effect of nitrogen on explosive gases. Therefore, nitrogen is typically purged into a flue gas duct at a certain distance from the converter opening to enhance the dilution effect. For example, in the dry dust removal system of the converter, the length of the flue gas duct between the evaporative cooler and the furnace opening is approximately 15-35 meters or 20-30 meters. This length is generally greater than a length threshold. Therefore, the nitrogen purging system can be installed at the flue gas duct at the outlet of the evaporative cooler, with the outlet flue gas duct of the evaporative cooler serving as the target flue gas duct, into which nitrogen is purged.

[0032] Simultaneously, flow detection and pressure detection devices can be installed at the outlet of the nitrogen purging system. The flow detection device detects the real-time purging flow rate of nitrogen, and the pressure detection device detects the real-time purging pressure of nitrogen. The detected real-time purging flow rate and pressure are remotely transmitted to the computer of the primary control system. This computer is used to adjust the purging flow rate and pressure of the nitrogen purging system using a PID (Proportional Integral Derivative) control method when the first difference between the detected real-time purging flow rate and the determined purging flow rate is greater than a first difference threshold, or the second difference between the detected real-time purging pressure and the determined purging pressure is greater than a second difference threshold. This ensures that the first difference is less than or equal to the first difference threshold and the second difference is less than or equal to the second difference threshold, thus achieving remote signal transmission and automatic and manual control by the computer.

[0033] Optionally, step S120 includes: The first step is to obtain the carbon monoxide and hydrogen content in the flue gas at the furnace opening.

[0034] In this embodiment of the application, a carbon monoxide sensor and a hydrogen sensor can be arranged at the furnace opening. The carbon monoxide sensor detects the carbon monoxide content in the flue gas at the furnace opening, and the hydrogen sensor detects the hydrogen content in the flue gas at the furnace opening.

[0035] The second step is to determine the nitrogen purging flow rate based on the oxygen blowing rate, carbon monoxide content, and hydrogen content.

[0036] Among them, the oxygen blowing rate, carbon monoxide content, and hydrogen content are all positively correlated with the purging flow rate.

[0037] In the embodiments of this application, the carbon monoxide and hydrogen content in the flue gas, as well as the amount of oxygen purging, directly affect the mixing ratio of explosive gases in the flue gas. Therefore, the amount of nitrogen that can dilute the mixing ratio to below the deflagration ratio is affected by the carbon monoxide content, hydrogen content, and amount of oxygen purging in the flue gas. In other words, the higher the amount of oxygen purging, carbon monoxide content, and hydrogen content, the more nitrogen is required, and the higher the purging flow rate needs to be set, in order to ensure that the mixing ratio of explosive gases is diluted below the deflagration ratio.

[0038] Optional, the second step includes: Determine the initial flow rates corresponding to the oxygen blowing rate, carbon monoxide content, and hydrogen content; obtain the temperature of the flue gas in the electrostatic precipitator of the dry dust removal system; determine the first correction factor for the purging flow rate corresponding to the temperature; and use the product of the first correction factor and the initial flow rate as the nitrogen purging flow rate.

[0039] In this embodiment, a first correspondence table between oxygen blowing volume, carbon monoxide content, hydrogen content, and initial flow rate can be pre-defined. The initial flow rate corresponding to these three values ​​can be found in the first correspondence table. When the temperature of the flue gas inside the electrostatic precipitator increases, the dilution effect deteriorates. To further improve the purging effect, a first correction coefficient for the purging flow rate can be determined based on the temperature of the flue gas inside the electrostatic precipitator in the dry dust removal system. The initial flow rate found in the first correspondence table is then corrected using this first correction coefficient. The product of the first correction coefficient and the initial flow rate can be used as the purging flow rate.

[0040] In this embodiment, the nitrogen purging pressure is determined based on the oxygen blowing rate. The oxygen blowing rate is positively correlated with the purging pressure. A first correction factor is positively correlated with the temperature of the flue gas inside the electrostatic precipitator.

[0041] Specifically, a second correspondence table between oxygen blowing volume and purging pressure can be pre-defined, and the purging pressure corresponding to the oxygen blowing volume can be found through this table. When the oxygen blowing volume is high, the oxygen in the flue gas will be relatively high, so the purging pressure can be appropriately increased to ensure the purging and dilution effects.

[0042] In addition, to ensure the stability of the flue gas flow after purging, the determined purging pressure must be within a set pressure range, and the maximum pressure difference within this range must be less than the set pressure difference threshold. This means that as the oxygen blowing volume changes, the purging pressure can only be adjusted within a small range. For example, for a 210-ton converter, the pressure range is 0.8 MPa to 0.9 MPa.

[0043] Step S120 further includes: Obtain the flue gas volume in the flue gas duct of the dry dust removal system; determine the nitrogen purging flow rate based on the oxygen blowing rate and the flue gas volume.

[0044] In this embodiment, the greater the volume of flue gas in the flue gas duct, the more nitrogen is required. Therefore, the volume of flue gas can be considered when determining the purging flow rate. For example, for a 210-ton converter, the volume of flue gas in the flue gas duct during the initial smelting stage is 24,000 m³. 3 / h, oxygen blowing rate is 32000m 3 / h, then the determined purging flow rate is 8000m³ / h. 3 / h.

[0045] Optionally, step S120 includes: Obtain the tonnage of the converter; determine the nitrogen purging time based on the oxygen blowing volume and tonnage.

[0046] Among them, both the oxygen blowing volume and the tonnage are positively correlated with the purging time.

[0047] In this embodiment, the larger the converter's tonnage, the more flue gas is generated, and the more flue gas flows to the electrostatic precipitator. The oxygen blowing rate also affects the content of explosive gases in the flue gas. Therefore, the nitrogen purging time can be determined based on both the oxygen blowing rate and the converter's tonnage. Specifically, the larger the oxygen blowing rate and the larger the tonnage, the longer the purging time can be set.

[0048] Among them, a third correspondence table of oxygen blowing volume, tonnage and purging time can be pre-defined. The purging time corresponding to oxygen blowing volume and tonnage can be found through the third correspondence table. This purging time can cover the duration of the initial smelting stage. Then, as the oxygen blowing volume and tonnage increase, it can be appropriately increased.

[0049] For example, the flue gas volume of a 210-ton converter in the initial stage of blowing is 24,000 m³. 3 / h corresponds to a purging flow rate of 8000m³ / h. 3 / h, purging time 40 seconds, nitrogen consumption ≈90 m³ / furnace.

[0050] Of course, the purging time obtained from the table can also be corrected based on the temperature of the flue gas inside the electrostatic precipitator, and the purging time can be used for purging. Specifically, a second correction coefficient is determined for the purging time corresponding to the flue gas temperature inside the electrostatic precipitator; the product of the second correction coefficient and the purging time obtained from the table is taken as the corrected purging time.

[0051] Figure 2 This is a front view of a nitrogen purging system structure provided in an embodiment of this application, such as... Figure 2 The nitrogen purging system includes a nitrogen source 1, a purging device 2, and a main gas supply pipe 3. Figure 3 This is a top view of a nitrogen purging system structure provided in an embodiment of this application, as shown below. Figure 3 As shown, the purging device 2 includes a nozzle 21, a gas source branch pipe 22, and a gas source ring pipe 23. The number of gas source branch pipes 22 and nozzles 21 is at least three. One end of each gas source branch pipe 22 is connected to the gas source ring pipe 23, and the other end of each gas source branch pipe 22 is connected to a nozzle 21 and faces the center of the gas source ring pipe 23. The connection points of all gas source branch pipes 22 and gas source ring pipe 23 are evenly distributed in the circumferential direction of the gas source ring pipe 23. One end of the gas source main pipe 3 is connected to the nitrogen source 1, and the other end of the gas source main pipe 3 is connected to the gas source ring pipe 23. In the dry dust removal system, an air inlet is provided on the flue gas duct 4, and the air source branch pipe 22 is inserted into the flue gas duct 4 through the air inlet.

[0052] In this embodiment, nitrogen flows from the main gas source 3 into the gas source ring pipe 23, and then through the gas source branch pipes 22, is injected into the flue gas duct 4 from the nozzle 21. Multiple gas source branch pipes 22 surround the flue gas duct and are evenly distributed, forming a "nitrogen hood" within the flue gas duct. This allows for more uniform mixing into the flue gas, preventing uneven local dilution, promoting plunger flow, resulting in low pressure loss, no ash accumulation, and no impact on subsequent dust removal. For example, three gas source branch pipes 22 are inserted vertically into the flue gas duct at a 120-degree angle.

[0053] Optionally, the nozzle outlet is oriented in the same direction as the flue gas flow within the flue gas duct.

[0054] In this embodiment, the direction of the nozzle outlet is designed to be consistent with the direction of flue gas flow in the flue gas duct, so that nitrogen flows better with the flue gas and the flue gas mixes better.

[0055] Based on the same concept, embodiments of the present invention also provide a device for preventing deflagration in a converter dry dust removal system. Figure 4 This is a structural block diagram of a device for preventing deflagration in a converter dry dust removal system, as provided in an embodiment of this application. Figure 4 As shown, the device 400 includes an acquisition module 401, a determination module 402, and a control module 403.

[0056] The acquisition module 401 is used to acquire the oxygen blowing volume of the oxygen lance if it receives an oxygen-starting signal from the converter oxygen lance. The determination module 402 is used to determine the purging parameters of nitrogen based on the oxygen blowing volume. The purging parameters include purging flow rate, purging pressure and purging time. Control module 403 is used to control the nitrogen purging system to purge nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters; Wherein, the distance between the outlet of the nitrogen purging system and the furnace opening of the converter is greater than a preset length threshold, and the target flue gas duct is the flue gas duct between the furnace opening of the converter and the electrostatic precipitator.

[0057] Optionally, the determining module 402 includes: The acquisition unit is used to acquire the carbon monoxide content and hydrogen content in the flue gas at the furnace opening. The determination unit is used to determine the nitrogen purging flow rate based on the oxygen blowing rate, carbon monoxide content, and hydrogen content. Among them, the oxygen blowing rate, carbon monoxide content, and hydrogen content are all positively correlated with the purging flow rate.

[0058] Optionally, the determining unit is also used for: Determine the initial flow rates corresponding to the oxygen blowing rate, carbon monoxide content, and hydrogen content; To obtain the temperature of the flue gas inside the electrostatic precipitator in a dry dust removal system; Determine the correction factor for the purging flow rate corresponding to the temperature; The product of the correction factor and the initial flow rate is used as the nitrogen purging flow rate.

[0059] Optionally, the determining module 402 is also used for: To obtain the tonnage of the converter; The nitrogen purging time is determined based on the amount and tonnage of oxygen purged. Among them, both the oxygen blowing volume and the tonnage are positively correlated with the purging time.

[0060] Optionally, the length threshold is determined based on the converter temperature, and the length threshold is positively correlated with the furnace temperature.

[0061] Optionally, the nitrogen purging system includes a nitrogen source, a purging device, and a main gas source pipe. The purging device includes a nozzle, a gas source branch pipe, and a gas source ring pipe. The number of gas source branch pipes and nozzles is at least three. One end of each gas source branch pipe is connected to the gas source ring pipe, and the other end of each gas source branch pipe is connected to a nozzle and faces the center of the gas source ring pipe. The connection points of all gas source branch pipes and gas source ring pipes are evenly distributed in the circumferential direction of the gas source ring pipe. One end of the main gas source pipe is connected to the nitrogen source, and the other end of the main gas source pipe is connected to the gas source ring pipe. In the dry dust removal system, an air inlet is provided on the flue gas duct, and the air source branch pipe is inserted into the flue gas duct through the air inlet.

[0062] Optionally, the nozzle outlet is oriented in the same direction as the flue gas flow within the flue gas duct.

[0063] It is understood that the device provided in the above embodiments is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0064] This invention also provides an electronic device that may include a processor and a memory, wherein the processor and the memory may be interconnected via a bus or other means.

[0065] The processor can be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application, or it can be 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, or other chips, or combinations of the above types of chips.

[0066] Memory may include mass storage for data or instructions. For example, and not limitingly, memory may include hard disk drives (HDDs), floppy disk drives, flash memory, optical disks, magneto-optical disks, magnetic tape, or Universal Serial Bus (USB) drives, or combinations of two or more of these. Where appropriate, memory may include removable or non-removable (or fixed) media. Where appropriate, memory may be internal or external to an electronic device. In a particular embodiment, memory may be non-volatile solid-state memory.

[0067] In one instance, the memory may be read-only memory (ROM). In one instance, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0068] The processor reads and executes computer program instructions stored in the memory to implement any of the methods for preventing deflagration in the converter dry dust removal system described in the above embodiments.

[0069] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus to communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. Where appropriate, the bus may include one or more buses.

[0070] Furthermore, in conjunction with the methods for preventing deflagration in the converter dry dust removal system described in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the methods for preventing deflagration in the converter dry dust removal system described in the above embodiments.

[0071] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0072] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages: This application provides a method, apparatus, equipment, and medium for preventing deflagration in a converter dry dust removal system. Upon receiving an oxygen lance activation signal, the oxygen lance's blowing rate is acquired, meaning the oxygen lance's blowing rate is acquired at the start of converter smelting. Based on the blowing rate, nitrogen purging parameters are determined to match the unreacted oxygen. These purging parameters include purging flow rate, purging pressure, and purging time. The nitrogen purging system is controlled to blow nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters. The target flue gas duct is the flue gas duct between the converter's furnace opening and the electrostatic precipitator. Nitrogen dilutes the explosive gases in the flue gas entering the electrostatic precipitator, reducing the mixing ratio of explosive gases below the deflagration ratio. This method determines the nitrogen purging parameters based on the oxygen blowing rate of the converter oxygen lance. By purging nitrogen into the target flue gas duct of the dry dust removal system using these parameters, the nitrogen effectively dilutes gases such as O2, H2, and CO in the flue gas entering the electrostatic precipitator, reducing the risk of deflagration and improving the safety of the dry dust removal system and the stability of converter operation.

[0073] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0074] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0075] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses 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. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the unit claims 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.

Claims

1. A method for preventing deflagration in a converter dry dust removal system, characterized in that, The method includes: If an oxygen lance start signal is received from the converter oxygen lance, the oxygen blowing rate of the oxygen lance is obtained. Based on the oxygen blowing volume, the nitrogen purging parameters are determined, including the purging flow rate, purging pressure, and purging time. The nitrogen purging system is controlled to purge nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters. Wherein, the length of the flue gas duct between the outlet of the nitrogen purging system and the furnace opening of the converter is greater than a preset length threshold, and the target flue gas duct is the flue gas duct between the furnace opening of the converter and the electrostatic precipitator.

2. The method for preventing deflagration in a converter dry dust removal system according to claim 1, characterized in that, The step of determining the nitrogen purging parameters based on the oxygen blowing rate includes: The carbon monoxide and hydrogen content in the flue gas at the furnace opening were obtained; The nitrogen purging flow rate is determined based on the oxygen blowing rate, the carbon monoxide content, and the hydrogen content. The oxygen blowing rate, carbon monoxide content, and hydrogen content are all positively correlated with the purging flow rate.

3. The method for preventing deflagration in a converter dry dust removal system according to claim 2, characterized in that, Determining the nitrogen purging flow rate based on the oxygen blowing rate, the carbon monoxide content, and the hydrogen content includes: Determine the initial flow rates corresponding to the oxygen blowing rate, the carbon monoxide content, and the hydrogen content; Obtain the temperature of the flue gas inside the electrostatic precipitator in the dry dust removal system; Determine the correction factor for the purging flow rate corresponding to the temperature; The product of the correction factor and the initial flow rate is taken as the purging flow rate of the nitrogen gas.

4. The method for preventing deflagration in a converter dry dust removal system according to claim 1, characterized in that, The step of determining the nitrogen purging parameters based on the oxygen blowing rate includes: Obtain the tonnage of the converter; The purging time of nitrogen is determined based on the oxygen blowing volume and the tonnage. The oxygen blowing volume and the tonnage are both positively correlated with the purging time.

5. The method for preventing deflagration in a converter dry dust removal system according to claim 1, characterized in that, The length threshold is determined based on the furnace temperature of the converter, and the length threshold is positively correlated with the furnace temperature.

6. The method for preventing deflagration in a converter dry dust removal system according to claim 1, characterized in that, The nitrogen purging system includes a nitrogen source, a purging device, and a main gas source pipe. The purging device includes a nozzle, a gas source branch pipe, and a gas source ring pipe. The number of gas source branch pipes and nozzles is at least three. One end of each gas source branch pipe is connected to the gas source ring pipe, and the other end of each gas source branch pipe is connected to a nozzle and faces the center of the gas source ring pipe. The connection points of all gas source branch pipes and the gas source ring pipe are evenly distributed in the circumferential direction of the gas source ring pipe. One end of the main gas source pipe is connected to the nitrogen source, and the other end of the main gas source pipe is connected to the gas source ring pipe. In the dry dust removal system, an air inlet is provided on the flue gas duct, and the air source branch pipe is inserted into the flue gas duct through the air inlet.

7. The method for preventing deflagration in a converter dry dust removal system according to claim 6, characterized in that, The nozzle outlet is oriented in the same direction as the flue gas flow direction within the flue gas duct.

8. A device for preventing deflagration in a converter dry dust removal system, characterized in that, The device includes: The acquisition module is used to acquire the oxygen blowing volume of the oxygen lance if it receives an oxygen-starting signal from the converter oxygen lance. The determining module is used to determine the nitrogen purging parameters based on the oxygen blowing volume, wherein the purging parameters include purging flow rate, purging pressure and purging time; The control module is used to control the nitrogen purging system to purge nitrogen into the target flue gas duct of the dry dust removal system according to the purging parameters. Wherein, the length of the flue gas duct between the outlet of the nitrogen purging system and the furnace opening of the converter is greater than a preset length threshold, and the target flue gas duct is the flue gas duct between the furnace opening of the converter and the electrostatic precipitator.

9. An electronic device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1-7.

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