Coke oven top cooling method and system, electronic equipment and storage medium

Abstract

The invention provides a coke oven top cooling method and system, electronic equipment and a storage medium. The method comprises the following steps: determining the gas displacement for reducing the furnace top temperature of the coke oven to the target temperature based on the pressure in the coke oven, the difference between the temperature distribution and the target temperature and the components of the raw gas; selecting one or more target ascension pipes from the ascension pipes of the coke oven based on the concentration distribution of the raw gas, the gas displacement and the positions of the ascension pipe holes; and controlling each target ascending pipe to be opened so as to reduce the furnace top temperature of the coke oven to the target temperature. According to the method, the furnace top temperature is accurately reduced to the target temperature, meanwhile, the discharge amount and the combustion process of the raw gas can be accurately controlled, heat resources in the raw gas are utilized to the maximum extent, energy waste is reduced, emission of unburnt gas is reduced, and the influence on the environment is reduced.

Description

Technical Field

[0001] The present invention relates to the field of coke oven control, and particularly to a method and system for cooling the coke oven top, an electronic device, and a storage medium. Background Art

[0002] In the iron and steel metallurgy industry, the coke oven, as one of the core equipment, is crucial for the production process. The top temperature of the coke oven refers to the temperature of the space above the oven during the coking process. This temperature is one of the important parameters for measuring the thermal state inside the coke oven and directly affects the thermal efficiency, product quality, and equipment life during the coking process. When the coke oven is operating, the high temperature inside the oven dissipates heat to the outside through radiation and convection. If the top temperature of the coke oven is too high, more heat will be lost to the environment through these means instead of being effectively utilized in the coking process.

[0003] Currently, the technology for cooling the top of the coke oven usually relies on experienced operators to manually adjust the working state of the riser pipes. This method is not only inefficient but also difficult to ensure consistency and accuracy. Summary of the Invention

[0004] Embodiments of the present invention provide a method and system for cooling the coke oven top, an electronic device, and a storage medium to solve the problem of improving the effect of cooling the coke oven top.

[0005] In a first aspect, embodiments of the present invention provide a method for cooling the coke oven top, including: Determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure, temperature distribution inside the coke oven and the target temperature, and the composition of the raw coke oven gas; Selecting one or more target riser pipes among the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe; Controlling the opening of each target riser pipe to reduce the top temperature of the coke oven to the target temperature.

[0006] In a possible implementation manner, determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure, temperature distribution inside the coke oven and the target temperature, and the composition of the raw coke oven gas includes: Calculating the heat discharge of the coke oven through a heat balance equation based on the difference between the temperature distribution inside the coke oven and the target temperature, and the composition of the raw coke oven gas; Constructing an ideal gas state equation based on the pressure inside the coke oven and converting the heat discharge into the exhaust gas volume of the coke oven through the ideal gas state equation.

[0007] In a possible implementation, before selecting one or more target riser pipes from the riser pipes of the coke oven based on the concentration distribution of raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe, it further includes: Obtain multiple sets of historical exhaust gas data of the coke oven; wherein, each set of historical exhaust gas data includes the number of opened riser pipes, the composition of raw coke oven gas, the flow rate of raw coke oven gas, the temperature change, and the pressure change; Based on the composition of raw coke oven gas, the flow rate of raw coke oven gas, the temperature change, and the pressure change in each set of historical exhaust gas data, determine the exhaust gas volume corresponding to this set of historical exhaust gas data; Perform discrete data curve fitting on the exhaust gas volume and the number of opened riser pipes of each set of historical exhaust gas data to obtain the number of opened riser pipes corresponding to multiple exhaust gas volume ranges; Correspondingly, based on the concentration distribution of raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe, selecting one or more target riser pipes from the riser pipes of the coke oven includes: Based on the number of opened riser pipes corresponding to multiple exhaust gas volume ranges, determine the number of opened riser pipes n corresponding to the exhaust gas volume; Select n riser pipes as target riser pipes.

[0008] In a possible implementation, the area inside the coke oven is divided into multiple grids, and each grid contains a hole of a riser pipe; the concentration distribution of raw coke oven gas is the concentration of raw coke oven gas in each grid, and the temperature distribution is the temperature in each grid; selecting n riser pipes as target riser pipes includes: Select n grids in the order of the highest concentration of raw coke oven gas in each grid, the highest temperature in each grid, there is a heat extractor in the riser pipe, and the least number of times the riser pipe is used, and use the corresponding riser pipes as target riser pipes.

[0009] In a possible implementation, before determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the difference between the pressure and temperature distribution inside the coke oven and the target temperature, and the composition of raw coke oven gas, it further includes: Obtain the temperature and the concentration of raw coke oven gas at multiple positions inside the coke oven; Input the temperature and the concentration of raw coke oven gas at multiple positions, and the operating conditions of the coke oven into the CFD model of the coke oven to obtain the temperature distribution and the concentration distribution of raw coke oven gas inside the coke oven.

[0010] In a possible implementation, after controlling the opening of each target riser pipe, it further includes: Wait for a preset interval, and again determine the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the difference between the pressure and temperature distribution inside the coke oven and the target temperature, and the composition of raw coke oven gas.

[0011] In a possible implementation, before waiting for a preset interval and determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the difference between the pressure and temperature distribution in the coke oven and the target temperature, as well as the composition of the raw coke oven gas, the method further includes: Obtaining multiple sets of historical exhaust gas data of the coke oven; each set of historical exhaust gas data includes the number of riser pipes opened and the opening duration of the riser pipes; Performing linear fitting on the number of riser pipes opened and the opening duration of the riser pipes in each set of historical exhaust gas data to obtain the opening duration of the riser pipes corresponding to multiple numbers of riser pipes opened; Correspondingly, the preset interval is the opening duration of the riser pipes corresponding to the number of target riser pipes.

[0012] In a second aspect, an embodiment of the present invention provides a coke oven top temperature reduction system, including: A calculation module, configured to determine the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the difference between the pressure and temperature distribution in the coke oven and the target temperature, as well as the composition of the raw coke oven gas; A selection module, configured to select one or more target riser pipes from the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the riser pipe holes; A control module, configured to control the opening of each target riser pipe to reduce the top temperature of the coke oven to the target temperature.

[0013] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method according to the first aspect or any possible implementation manner of the first aspect are implemented.

[0014] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the method according to the first aspect or any possible implementation manner of the first aspect are implemented.

[0015] The embodiment of the present invention provides a coke oven top temperature reduction method, system, electronic device, and storage medium. Considering the composition and concentration distribution of the raw coke oven gas in the coke oven, when the volatile matter of the coal in the coke oven is higher than expected, resulting in more raw coke oven gas, it is possible to reasonably arrange the opened riser pipes to ensure the effective discharge of the raw coke oven gas. While accurately reducing the top temperature to the target temperature, it is also possible to accurately control the discharge volume and combustion process of the raw coke oven gas, maximize the utilization of the heat resources therein, reduce energy waste, and reduce the emission of unburned gases, thereby reducing the impact on the environment. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the attached drawings required for use in the embodiments or the description of the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0017] Figure 1 is the implementation flowchart of the coke oven top cooling method provided by the embodiment of the present invention; Figure 2 is the structural schematic diagram of the coke oven top cooling system provided by the embodiment of the present invention; Figure 3 is the schematic diagram of the electronic device provided by the embodiment of the present invention. Detailed implementation manners

[0018] In the following description, specific details such as specific system structures and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. However, those skilled in the art should clearly understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present invention.

[0019] To make the purpose, technical solutions, and advantages of the present invention clearer, the following will be described through specific embodiments in conjunction with the attached drawings.

[0020] Refer to Figure 1 , which shows the implementation flowchart of the coke oven top cooling method provided by the embodiment of the present invention, and is described in detail as follows: Step 101, based on the differences between the pressure, temperature distribution in the coke oven and the target temperature, as well as the composition of the raw coke oven gas, determine the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature.

[0021] In this embodiment, determining the exhaust gas volume according to the temperature field in the furnace and the target temperature (or the furnace internal pressure and the target pressure) and accordingly deciding the number of riser pipes to be opened is a process involving multiple considerations. This process usually needs to be realized by combining real-time monitoring data, physical models, and automatic control strategies.

[0022] Specifically, temperature sensors, pressure sensors, and gas composition analyzers can be deployed at key positions of the coke oven (such as the inlets of each riser pipe, the outlet of the collecting pipe, etc.) for real-time collection of data such as temperature, pressure, and the composition of the raw coke oven gas.

[0023] Then, based on known physical principles, a mathematical model describing heat transfer and gas flow in the furnace is established. This includes considering the effects of factors such as coal type characteristics, coal charging amount, heating regime, etc. on the temperature field and gas pressure.

[0024] If sufficient historical data is available, a machine learning model can also be trained to predict the temperature field and gas pressure changes over a period of time in the future, providing a basis for dynamic adjustment.

[0025] First, based on the difference between the current temperature field and the target temperature, the excess heat to be discharged is estimated. Assuming that a certain amount of heat is carried away by per unit volume of raw gas, the required discharge amount of raw gas can be calculated based on the total amount of heat to be removed.

[0026] Similarly, if gas pressure is considered, the volume of gas to be discharged needs to be calculated based on the difference between the current gas pressure and the target gas pressure, in combination with the gas state equation (such as the ideal gas law).

[0027] Step 102: Based on the concentration distribution of raw gas, the exhaust gas volume, and the positions of each riser pipe hole, select one or more target riser pipes in each riser of the coke oven.

[0028] In this embodiment, after determining the total exhaust gas volume requirement, it is necessary to reasonably distribute the exhaust gas volume to each riser pipe, so as to preferentially remove and reuse the unburned gas in combination with the concentration distribution of raw gas. This step needs to consider the designed displacement of each riser pipe, its current working state, and the actual requirements of the area where it is located. For example, for areas with higher temperature or larger gas pressure, the riser pipes in these areas should be preferentially opened to accelerate the discharge of heat and gas. At the same time, the balanced use of equipment should also be considered to avoid some riser pipes being in a high-load operation state for a long time.

[0029] Step 103: Control the opening of each target riser pipe to reduce the top temperature of the coke oven to the target temperature.

[0030] In this embodiment, during the actual operation process, there may be certain differences between the state of the coke oven and the predicted or calculated parameters. During the control process, the effects of the above control strategies can also be regularly evaluated, including but not limited to indicators such as the stability of the top temperature of the coke oven and the effective utilization rate of raw gas. Then, a proportional-integral-derivative (PID) controller is used to automatically adjust the working state of the riser pipe according to the deviation between the actual temperature reduction effect and the expected target value, such as the opening degree of the valve of each opened riser pipe, to achieve precise, fast, and stable temperature and gas pressure regulation.

[0031] Through the above steps, the exhaust gas volume can be effectively determined according to the temperature field in the furnace and the target temperature (or gas pressure), and accordingly the number of riser pipes to be opened can be determined, so as to more precisely manage the operating conditions of the coke oven, improve the energy utilization efficiency, and reduce environmental pollution.

[0032] In the embodiments of the present invention, the composition and concentration distribution of raw gas in the coke oven are considered. When the volatile matter of the coal in the coke oven is higher than expected, resulting in more raw gas being generated, the riser pipes to be opened can be reasonably arranged to ensure the effective discharge of the raw gas. While accurately reducing the top temperature of the coke oven to the target temperature, the discharge amount of the raw gas and the combustion process can also be accurately controlled, maximizing the utilization of the heat resources therein, reducing energy waste, and reducing the emission of unburned gases, thereby reducing the impact on the environment.

[0033] In a possible implementation manner, based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, as well as the composition of the raw gas, the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature is determined, including: Based on the difference between the temperature distribution in the coke oven and the target temperature, as well as the composition of the raw gas, the heat discharge amount of the coke oven is calculated through the heat balance equation; Based on the pressure in the coke oven, the ideal gas state equation is constructed, and the heat discharge amount is converted into the exhaust gas volume of the coke oven through the ideal gas state equation.

[0034] In this embodiment, a certain amount of heat needs to be removed by discharging the raw gas to achieve the purpose of temperature reduction. The following formula can be used to estimate the required amount of raw gas to be discharged: (1) Heat balance equation

[0035] Wherein, is the heat to be removed (kJ), is the mass flow rate of the raw gas (kg / s), is the specific heat capacity of the raw gas (kJ / (kg·K)), and the specific value depends on the specific composition of the raw gas (the specific composition of the raw gas will affect its specific heat capacity and molar mass, so the average value based on the specific composition should be used in actual calculations), is the difference between the temperature distribution in the coke oven and the target temperature (K). According to the difference between the temperature field and the target temperature (such as the average temperature in the furnace or the average temperature in the top area of the furnace minus the target temperature), the total heat to be removed can be calculated using the heat balance equation, converted into the mass flow rate of the raw gas, and then into the volume flow rate.

[0036] (2) Ideal gas state equation

[0037] Wherein, is the absolute pressure (Pa), is the volume (m³ / s), is the amount of substance (mol), is the universal gas constant (8.314 J / (mol·K)), is the absolute temperature (K).

[0038] When it is necessary to consider the change of the gas pressure in the furnace and keep the temperature constant, the amount of raw coke oven gas to be discharged can be estimated according to the ideal gas law.

[0039] This calculation process of heat discharge / ventilation volume not only considers the heat carried away by the discharged raw coke oven gas, but also combines the unburned heat of the raw coke oven gas itself, avoiding a large amount of heat release from the combustion of the raw coke oven gas after ventilation, resulting in a still high temperature at the top of the furnace, and realizing effective control of the internal environment of the coke oven.

[0040] In a possible implementation, before selecting one or more target riser pipes in each riser pipe of the coke oven based on the concentration distribution of the raw coke oven gas, the ventilation volume, and the positions of the holes of each riser pipe, it further includes: Obtaining multiple groups of historical ventilation data of the coke oven; wherein, each group of historical ventilation data includes the number of opened riser pipes, the composition of the raw coke oven gas, the flow rate of the raw coke oven gas, the temperature change, and the pressure change; Based on the composition of the raw coke oven gas, the flow rate of the raw coke oven gas, the temperature change, and the pressure change in each group of historical ventilation data, determining the ventilation volume corresponding to this group of historical ventilation data; Performing discrete data curve fitting on the ventilation volumes and the number of opened riser pipes of each group of historical ventilation data to obtain the number of opened riser pipes corresponding to multiple ventilation volume ranges; Correspondingly, selecting one or more target riser pipes in each riser pipe of the coke oven based on the concentration distribution of the raw coke oven gas, the ventilation volume, and the positions of the holes of each riser pipe, includes: Based on the number of opened riser pipes corresponding to multiple ventilation volume ranges, determining the number of opened riser pipes n corresponding to the ventilation volume; Selecting n riser pipes as the target riser pipes.

[0041] In this embodiment, experiments can be carried out and historical ventilation data can be recorded to determine the influence of the number of opened riser pipes on the ventilation volume, and accordingly, the number of opened riser pipes corresponding to multiple levels of ventilation volume can be set.

[0042] During the experiment, the independent variable (the number of opened riser pipes) and the dependent variable (the ventilation volume) in the experiment should be clarified. Other factors that may affect the results (such as coal type, coal charging amount, heating system, etc.) should be kept as constant as possible or recorded for subsequent analysis. The experiment is divided into several groups according to the number of riser pipes. For example, if there are 10 riser pipes in the coke oven, different combinations from opening 1 riser pipe to opening all riser pipes can be designed. Each group of experiments is repeated at least three times to reduce random errors. In each experiment, except for the number of opened riser pipes, other conditions should be kept as constant as possible, such as the working load and heating intensity of the coke oven.

[0043] Under each experimental condition, sensors are used to monitor and record in real time parameters such as the flow rate, temperature, and pressure of raw coke oven gas. Special attention should be paid to recording the actual discharge amount of raw coke oven gas under the open state of each riser pipe.

[0044] For each set of experimental conditions, calculate the average value and standard deviation of the discharge amount of raw coke oven gas, and evaluate the difference in the exhaust gas volume under different numbers of open riser pipes. According to the results of discrete data curve fitting, determine several key exhaust gas volume levels. These levels should cover all cases from the minimum to the maximum exhaust gas demand, and there should be sufficient intervals between each level to ensure operational flexibility. Match the exhaust gas volume range and the corresponding number of open riser pipes for each exhaust gas volume level.

[0045] Generally, as the exhaust gas volume demand increases, more riser pipes need to be opened to meet the requirements. When the number of open riser pipes increases, the gas channels inside the coke oven become more, and the resistance decreases, thus allowing more raw coke oven gas to be discharged smoothly. This conforms to the basic principle of fluid mechanics, that is, under the same pressure difference, the larger the flow area, the larger the flow rate.

[0046] In a possible implementation, the area inside the coke oven is divided into multiple grids, and each grid contains a riser pipe hole; the concentration distribution of raw coke oven gas is the concentration of raw coke oven gas in each grid, and the temperature distribution is the temperature in each grid; select n riser pipes as the target riser pipes, including: Select n grids according to the priority order of the highest concentration of raw coke oven gas in each grid, the highest temperature in each grid, the presence of a heat extractor in the riser pipe, and the least number of times the riser pipe is used, and use the corresponding riser pipes as the target riser pipes.

[0047] In this embodiment, to achieve precise distribution of raw coke oven gas inside the coke oven, the inside of the coke oven can be divided into multiple grid areas according to the position of the riser pipe inlet. Each grid should be as evenly distributed as possible to ensure effective coverage of the entire roof space.

[0048] For all grid areas, perform priority sorting according to the degree of deviation of the concentration and temperature of raw coke oven gas from the target values. Prioritize the areas with high concentration and high temperature of raw coke oven gas, because these areas most need to be adjusted by increasing the operation of riser pipes.

[0049] Specifically, sort all grids according to the following priority order: 1. The highest concentration of raw coke oven gas: First, select the grid with the highest concentration of raw coke oven gas.

[0050] 2. Highest temperature: If the concentration of raw coke oven gas in multiple grids is the same, select the grid with the highest temperature. By preferentially selecting the grids with the highest concentration and highest temperature of raw coke oven gas, the areas that need to be focused on can be located more effectively, ensuring that the raw coke oven gas in these areas can be discharged in a timely manner and avoiding problems such as local overheating or incomplete combustion.

[0051] 3. There is a heat extractor in the riser pipe: Under the condition that the first two conditions are the same, preferentially select the riser pipe equipped with a heat extractor. Preferentially selecting the riser pipe equipped with a heat extractor can maximize the recovery of heat while discharging the raw coke oven gas, improving energy utilization efficiency.

[0052] 4. The riser pipe with the fewest usage times: Finally, under the condition that all other conditions are the same, select the riser pipe with the fewest usage times. By considering the usage times of the riser pipes and preferentially selecting the riser pipe with the fewest usage times, it helps to balance the workload of each riser pipe and avoid premature aging of some riser pipes due to long-term high-load operation, extending the overall service life of the equipment.

[0053] Select the riser pipes corresponding to the first n grids from the sorted list of priorities as the target riser pipes in sequence.

[0054] It is also possible to allocate the workload of the riser pipes proportionally according to the deviation degree of the concentration and temperature of the raw coke oven gas in each grid area. For example, if the concentration of the raw coke oven gas in a certain area is twice that of another area, the opening time of the riser pipe corresponding to this area should also be twice that of the other area.

[0055] On the premise of meeting the total exhaust gas volume requirement, dynamic adjustment can be made according to the actual operation situation. For example, when it is found that the temperature in a certain area drops rapidly, the working time of the riser pipe in this area can be appropriately reduced, and the working time of the riser pipe in other areas that need more adjustment can be increased instead.

[0056] Through the above steps, the method of grid management can be effectively utilized, combined with the information of the concentration and temperature of the raw coke oven gas, to intelligently select the appropriate riser pipes to work, ensuring that the required exhaust gas volume requirement is met, and at the same time maintaining the ideal top temperature and pressure conditions of the furnace.

[0057] In a possible implementation manner, before determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the difference between the pressure, temperature distribution in the coke oven and the target temperature, and the composition of the raw coke oven gas, it further includes: Obtain the temperature and the concentration of the raw coke oven gas at multiple positions in the coke oven; Input the temperature and the concentration of the raw coke oven gas at multiple positions, as well as the operating conditions of the coke oven, into the CFD model of the coke oven to obtain the temperature distribution and the concentration distribution of the raw coke oven gas in the coke oven.

[0058] In this embodiment, tools such as computational fluid dynamics (CFD) can be used to simulate the heat flow field inside the coke oven and predict the composition of raw coke oven gas and its three-dimensional distribution at the oven top. The specific implementation steps are as follows: 1. Pretreatment Geometric modeling: According to the actual structural dimensions of the coke oven, a three-dimensional model is established in CAD software. This step requires accurately reproducing all key components of the coke oven, such as the carbonization chamber, combustion chamber, riser pipe, etc.

[0059] Mesh generation: The geometric model is divided into a large number of small cells (meshes) to facilitate numerical solution. The quality of the mesh directly affects the accuracy of the simulation results and the computational efficiency. For complex regions (such as near the riser pipe inlet), finer meshes can be used to improve the accuracy.

[0060] Define boundary conditions: Setting appropriate boundary conditions is an important step to ensure the accuracy of the simulation. Common boundary conditions include: Inlet boundary conditions: Specify the velocity, temperature, and composition of the air or gas entering the coke oven.

[0061] Outlet boundary conditions: Set the pressure or flow rate at the outlet.

[0062] Wall conditions: Define the temperature, thermal conductivity, etc. of the carbonization chamber wall.

[0063] 2. Solution settings Select a physical model: Select a suitable physical model based on the specific nature of the problem. For coke oven simulation, the following aspects usually need to be considered: Turbulence model: Since the gas flow inside the coke oven is usually in a turbulent state, an appropriate turbulence model (such as the k-ε model, large eddy simulation (LES), etc.) needs to be selected to describe the turbulence effect.

[0064] Chemical reaction model: If a combustion process is involved, a corresponding chemical reaction kinetics model needs to be introduced to describe the chemical reaction between the fuel and oxygen and its products.

[0065] Radiation heat transfer model: Considering the importance of radiation heat transfer in a high-temperature environment, a suitable radiation model (such as the P-1 model, discrete coordinate method, etc.) needs to be selected.

[0066] Set solver options: Select suitable numerical methods and solver options, such as pressure-velocity coupling schemes (SIMPLE, PISO, etc.), time step size, etc.

[0067] 3. Run the simulation Initialize the computational domain: Assign initial values to all variables in the computational domain. These initial values can be empirical values or the results of a previous simulation.

[0068] Perform iterative solution: Start the CFD solver for iterative calculations until the convergence criterion is reached (i.e., the residual is below the preset threshold). During the whole process, monitor the change trends of key variables to ensure the stability of the calculation.

[0069] To make the CFD simulation as close to the actual situation as possible, multiple types of input parameters need to be provided: Geometric parameters: Information such as the specific dimensions (length, width, height), shape characteristics, and connection methods of each part of the coke oven.

[0070] Material properties: Physical properties such as thermal conductivity, specific heat capacity, and density of different materials (such as refractory bricks and metal structural parts).

[0071] Operating conditions: Coal type characteristics: Key indicators affecting combustion performance such as volatile content, ash ratio, and fixed carbon content.

[0072] Coal charging amount: The total amount of coal charge loaded into the carbonization chamber each time.

[0073] Heating regime: Process parameters such as the set standard flue temperature and heating cycle.

[0074] Gas supply: The gas flow rate, composition, and its temperature entering the combustion chamber.

[0075] Air supply: The air flow rate and its temperature entering the combustion chamber.

[0076] Environmental conditions: Factors such as the external atmospheric pressure and ambient temperature that may affect the simulation results.

[0077] Through the above steps and parameter settings, a relatively accurate physical process model of the coke oven interior can be constructed, which helps to deeply understand the temperature field and the distribution of raw coke oven gas concentration, and accordingly formulate effective control strategies. This method not only improves the understanding depth of the production process but also provides a scientific basis for energy conservation and emission reduction.

[0078] In a possible implementation, after controlling the opening of each target riser pipe, it further includes: Wait for a preset interval, and then determine again the exhaust gas volume used to reduce the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, as well as the composition of the raw coke oven gas.

[0079] In this embodiment, after opening the target riser pipe, a preset time interval (such as 5 minutes or adjusted according to specific circumstances) is set. This interval is to allow the system sufficient time to respond to the changes brought about by the opening operation.

[0080] During this period, raw coke oven gas starts to be discharged, and the temperature and pressure distributions also change. At this time, secondary monitoring and calculation are carried out again, and the subsequent riser control strategy can be adjusted according to the latest temperature, pressure and raw coke oven gas composition data. When the temperature approaches the target value, the working cycle of the riser is shortened to avoid other problems caused by excessive cooling.

[0081] In this embodiment, by reasonably arranging the working cycle of the riser, the effective discharge of raw coke oven gas can be ensured, which helps the system converge to the target temperature faster and maintain temperature stability during the subsequent generation process.

[0082] In a possible implementation, before waiting for a preset interval and determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature again based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, as well as the composition of the raw coke oven gas, it further includes: Obtain multiple sets of historical exhaust gas data of the coke oven; wherein, each set of historical exhaust gas data includes the number of risers opened and the opening duration of the risers; Perform linear fitting on the number of risers opened and the opening duration of the risers in each set of historical exhaust gas data to obtain the opening duration of the risers corresponding to multiple numbers of risers opened; Correspondingly, the preset interval is the opening duration of the risers corresponding to the number of target risers.

[0083] In this embodiment, the opening duration of the riser is the duration required to reach the target temperature under different numbers of risers opened. By analyzing the historical exhaust gas data, using the linear fitting method to predict the opening duration corresponding to different numbers of risers opened, and setting the preset interval time accordingly, the preset interval can be made closer to the actual situation, reducing the number of adjustments to the riser control strategy, and avoiding excessive cooling caused by too long opening duration of the riser.

[0084] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0085] The following is a system embodiment of the present invention. For the details not described in detail, reference can be made to the corresponding method embodiments above.

[0086] Figure 2 The structural schematic diagram of the coke oven top temperature reduction system provided by the embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown and are described in detail as follows: As Figure 2 shown, the coke oven top temperature reduction system 2 includes: A calculation module 21, configured to determine the exhaust gas volume for reducing the top temperature of the coke oven to a target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, and the composition of the raw coke oven gas. A selection module 22, configured to select one or more target riser pipes from the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe. A control module 23, configured to control the opening of each target riser pipe to reduce the top temperature of the coke oven to the target temperature.

[0087] In a possible implementation, the calculation module 21 is specifically configured to: Calculate the heat discharge of the coke oven through a heat balance equation based on the difference between the temperature distribution in the coke oven and the target temperature, and the composition of the raw coke oven gas. Construct an ideal gas state equation based on the pressure in the coke oven, and convert the heat discharge into the exhaust gas volume of the coke oven through the ideal gas state equation.

[0088] In a possible implementation, the selection module 22 is further configured to: Before selecting one or more target riser pipes from the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe, obtain multiple sets of historical exhaust gas data of the coke oven; wherein each set of historical exhaust gas data includes the number of opened riser pipes, the composition of the raw coke oven gas, the raw coke oven gas flow rate, the temperature change, and the pressure change. Determine the exhaust gas volume corresponding to each set of historical exhaust gas data based on the composition of the raw coke oven gas, the raw coke oven gas flow rate, the temperature change, and the pressure change in each set of historical exhaust gas data. Perform discrete data curve fitting on the exhaust gas volumes and the number of opened riser pipes of each set of historical exhaust gas data to obtain the number of opened riser pipes corresponding to multiple exhaust gas volume ranges. Correspondingly, selecting one or more target riser pipes from the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe includes: Determine the number of opened riser pipes n corresponding to the exhaust gas volume based on the number of opened riser pipes corresponding to multiple exhaust gas volume ranges. Select n riser pipes as target riser pipes.

[0089] In a possible implementation, the area in the coke oven is divided into multiple grids, and each grid contains a hole of a riser pipe; the concentration distribution of the raw coke oven gas is the concentration of the raw coke oven gas in each grid, and the temperature distribution is the temperature in each grid; the selection module 22 is specifically configured to: Select n grids in the order of the highest concentration of the raw coke oven gas in each grid, the highest temperature in each grid, the presence of a heat extractor in the riser pipe, and the least number of times the riser pipe is used, and use the corresponding riser pipes as target riser pipes.

[0090] In a possible implementation, the computing module 21 is further configured to: Before determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, and the composition of the raw coke oven gas, obtain the temperatures at multiple positions in the coke oven and the concentration of the raw coke oven gas; Input the temperatures and the concentration of the raw coke oven gas at multiple positions, as well as the operating conditions of the coke oven, into the CFD model of the coke oven to obtain the temperature distribution and the concentration distribution of the raw coke oven gas in the coke oven.

[0091] In a possible implementation, the control module 23 is further configured to: After controlling the opening of each target riser pipe, wait for a preset interval, and then determine again the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, and the composition of the raw coke oven gas.

[0092] In a possible implementation, the control module 23 is further configured to: Before waiting for a preset interval and then determining again the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, and the composition of the raw coke oven gas, obtain multiple sets of historical exhaust gas data of the coke oven; wherein each set of historical exhaust gas data includes the number of opened riser pipes and the opening duration of the riser pipes; Perform linear fitting on the number of opened riser pipes and the opening duration of the riser pipes in each set of historical exhaust gas data to obtain the opening duration of the riser pipes corresponding to multiple numbers of opened riser pipes; Correspondingly, the preset interval is the opening duration of the riser pipes corresponding to the number of target riser pipes.

[0093] The embodiment of the present invention takes into account the composition and concentration distribution of the raw coke oven gas in the coke oven. When the volatile matter of the coal in the coke oven is higher than expected, resulting in more raw coke oven gas being generated, it can reasonably arrange the opened riser pipes to ensure the effective discharge of the raw coke oven gas. While accurately reducing the top temperature of the coke oven to the target temperature, it can also accurately control the discharge volume of the raw coke oven gas and the combustion process, maximize the utilization of the heat resources therein, reduce energy waste, and reduce the emission of unburned gases, thereby reducing the impact on the environment.

[0094] Figure 3 It is a schematic diagram of the electronic device provided by the embodiment of the present invention. As Figure 3 shown, the electronic device 3 of this embodiment includes: a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the processor 30. When the processor 30 executes the computer program 32, it implements the steps in the above-mentioned embodiments of the method for cooling the top of the coke oven, for example Figure 1Steps 101 to 103 shown. Alternatively, when the processor 30 executes the computer program 32, the functions of each module / unit in the above system embodiments are implemented. For example Figure 2 the functions of the shown modules / units 21 to 23.

[0095] Exemplarily, the computer program 32 can be divided into one or more modules / units. The one or more modules / units are stored in the memory 31 and executed by the processor 30 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program 32 in the electronic device 3. For example, the computer program 32 can be divided into Figure 2 the shown modules / units 21 to 23.

[0096] The electronic device 3 can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The electronic device 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art can understand that Figure 3 merely examples of the electronic device 3, which do not constitute a limitation to the electronic device 3. It may include more or fewer components than shown, or combine certain components, or different components. For example, the electronic device may further include input / output devices, network access devices, a bus, etc.

[0097] The so-called processor 30 may be a central processing unit (CPU), or may also 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, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0098] The memory 31 may be an internal storage unit of the electronic device 3, such as a hard disk or memory of the electronic device 3. The memory 31 may also be an external storage device of the electronic device 3, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device 3. Further, the memory 31 may also include both the internal storage unit of the electronic device 3 and the external storage device. The memory 31 is used to store the computer program and other programs and data required by the electronic device. The memory 31 may also be used to temporarily store the data that has been output or will be output.

[0099] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated herein.

[0100] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0102] In the embodiments provided by the present invention, it should be understood that the disclosed device / terminal and method can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical, or other forms.

[0103] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0104] In addition, in each embodiment of the present invention, the functional units can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0105] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above method embodiments of the present invention, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above embodiments of each coke oven top cooling method can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0106] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for cooling the top of a coke oven, characterized in that, Including: Determine the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions and the target temperature inside the coke oven, as well as the composition of the raw coke oven gas; Select one or more target riser pipes among the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe; Control the opening of each target riser pipe to reduce the top temperature of the coke oven to the target temperature.

2. The coke oven top cooling method according to claim 1, characterized in that, The determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions and the target temperature inside the coke oven, as well as the composition of the raw coke oven gas, includes: Calculate the heat discharge of the coke oven through a heat balance equation based on the difference between the temperature distribution and the target temperature of the coke oven, as well as the composition of the raw coke oven gas; Construct an ideal gas state equation based on the pressure inside the coke oven, and convert the heat discharge into the exhaust gas volume of the coke oven through the ideal gas state equation.

3. The coke oven top cooling method according to claim 1, characterized in that, Before the selecting one or more target riser pipes among the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe, it further includes: Obtain multiple sets of historical exhaust gas data of the coke oven; wherein, each set of historical exhaust gas data includes the number of opened riser pipes, the composition of the raw coke oven gas, the flow rate of the raw coke oven gas, the temperature change, and the pressure change; Determine the exhaust gas volume corresponding to each set of historical exhaust gas data based on the composition of the raw coke oven gas, the flow rate of the raw coke oven gas, the temperature change, and the pressure change in each set of historical exhaust gas data; Perform discrete data curve fitting on the exhaust gas volumes and the numbers of opened riser pipes of each set of historical exhaust gas data to obtain the numbers of opened riser pipes corresponding to multiple exhaust gas volume ranges; Correspondingly, the selecting one or more target riser pipes among the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the holes of each riser pipe, includes: Determine the number of opened riser pipes n corresponding to the exhaust gas volume based on the numbers of opened riser pipes corresponding to multiple exhaust gas volume ranges; Select n riser pipes as the target riser pipes.

4. The coke oven top cooling method according to claim 3, characterized in that, The area inside the coke oven is divided into multiple grids, and each grid contains a hole of a riser pipe; the concentration distribution of the raw coke oven gas is the concentration of the raw coke oven gas in each grid, and the temperature distribution is the temperature in each grid; The selecting n riser pipes as the target riser pipes includes: Select n grids in the order of the highest concentration of the raw coke oven gas in each grid, the highest temperature in each grid, the presence of a heat extractor in the riser pipe, and the least number of uses of the riser pipe, and use the corresponding riser pipes as the target riser pipes.

5. The coke oven top cooling method according to claim 1, characterized in that, Before the determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions and the target temperature inside the coke oven, as well as the composition of the raw coke oven gas, it further includes: Obtain the temperatures and the concentrations of the raw coke oven gas at multiple positions inside the coke oven; Input the temperatures and the concentrations of the raw coke oven gas at the multiple positions, as well as the operating conditions of the coke oven, into the CFD model of the coke oven to obtain the temperature distribution and the concentration distribution of the raw coke oven gas inside the coke oven.

6. The coke oven top cooling method according to claim 1, characterized in that, After the controlling the opening of each target riser pipe, it further includes: Wait for a preset interval, and again determine the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, as well as the composition of the raw coke oven gas.

7. The coke oven top cooling method according to claim 6, characterized in that, Before waiting for the preset interval and again determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, as well as the composition of the raw coke oven gas, it further includes: Obtain multiple sets of historical exhaust gas data of the coke oven; wherein, each set of historical exhaust gas data includes the number of riser pipes opened and the opening duration of the riser pipes. Perform linear fitting on the number of riser pipes opened and the opening duration of the riser pipes in each set of historical exhaust gas data to obtain the opening duration of the riser pipes corresponding to multiple numbers of riser pipes opened. Correspondingly, the preset interval is the opening duration of the riser pipes corresponding to the number of target riser pipes.

8. A coke oven top cooling system, characterized in that, It includes: A calculation module for determining the exhaust gas volume for reducing the top temperature of the coke oven to the target temperature based on the differences between the pressure and temperature distributions in the coke oven and the target temperature, as well as the composition of the raw coke oven gas. A selection module for selecting one or more target riser pipes from the riser pipes of the coke oven based on the concentration distribution of the raw coke oven gas, the exhaust gas volume, and the positions of the riser pipe holes. A control module for controlling the opening of each target riser pipe to reduce the top temperature of the coke oven to the target temperature.

9. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7 above.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 7 above.

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