Method, device and equipment for monitoring dynamic changes of material layer in blast furnace without bell distribution

Abstract

This invention provides a method, apparatus, and equipment for monitoring the dynamic changes of the blast furnace charge layer in a bell-less charging system. The method involves determining the charge movement trajectory parameters; based on these parameters, and according to the volume growth law of the charge surface and an optimization iterative method, determining the charge surface equation of the single-ring charge after combining with the old charge surface; based on the charge surface equation, iteratively calculating the charge surface shape after multi-ring charging to obtain a blast furnace charging model; updating the charge distribution tracking data based on the blast furnace charging model to reflect the latest state of the charge layer; storing the updated charge distribution tracking data in a pre-established database table; using the tracking data in the database table, solving the dynamic charge layer trajectory equation using an optimization algorithm, and obtaining the dynamic shape of the charge layer at different positions within the furnace based on the dynamic charge layer trajectory equation; and determining the dynamically changing charge surface shape and trajectory in the blast furnace based on the dynamic charge layer trajectory equation and the charge layer shape, thereby achieving accurate monitoring of the dynamic changes in the charge layer.

Description

Technical Field

[0001] The invention relates to the technical field of bell-free charging of blast furnaces, and in particular to a method, device and equipment for monitoring dynamic changes of a material layer in a bell-free charging of a blast furnace. Background Art

[0002] Bellless charging of blast furnaces is a common charging method in modern blast furnace production. As one of the important technologies in blast furnace production, the charging sequence, landing point position, material surface shape and radial ore-coke ratio distribution of bellless charging determine the distribution of gas flow and the position of the soft melting zone, and affect the smooth operation of the blast furnace. In actual production, the black box characteristics of blast furnaces result in the fact that the charging distribution relies on manual judgment and adjustment combined with other parameters, and is affected by the blast furnace time lag, which leads to high labor intensity of employees, untimely adjustment and reduced production efficiency.

[0003] Regarding the research on bell-free charge distribution in blast furnaces, the existing method is to calculate the distribution of charge in the furnace by establishing a mathematical model or other auxiliary devices. For example, Patent Publication No. CN112226557A numerically calculates the platform width ratio by calculating the position of the charge landing point, Patent Publication No. CN105695652A uses a profiler to provide the charge surface status of the blast furnace top, and Patent Publication No. CN104561407A uses a blast furnace cold charge distribution model experiment to simulate the actual charge distribution situation in blast furnace production.

[0004] However, for the actual charging system, huge smoke and dust are generated after the charge enters the furnace, which leads to inaccurate monitoring instruments; the outer pile angles formed by the charge at different inclination angles are also different. In addition, the position and shape of the batch material surface are also changing during the smelting process. The above existing solutions cannot effectively deal with the above problems. Summary of the invention

[0005] The present invention provides a method, device and equipment for monitoring dynamic changes of material layers in a blast furnace without bell distribution, so as to solve the technical problem that the shape of the material surface and the trajectory of the material layers of the blast furnace cannot be accurately monitored in real time in the prior art.

[0006] On the one hand, the present invention provides a method for monitoring dynamic changes of material layers in a blast furnace without bell distribution, comprising:

[0007] Collect parameter data sets related to blast furnace bell-free burden distribution;

[0008] Determining the parameters of the charge movement trajectory based on the parameter data set;

[0009] Based on the movement trajectory parameters of the charge, according to the volume growth law of the charge surface and the optimization iteration method, the charge surface equation after the single-ring charge and the old charge surface are combined is determined;

[0010] Based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated to obtain a blast furnace charging model; wherein the blast furnace charging model is used to describe the material surface shape of the blast furnace after multi-ring charging;

[0011] Based on the blast furnace burden distribution model, updating the tracking data of the burden layer to reflect the latest status of the burden layer in the furnace;

[0012] storing updated charge layer tracking data into a pre-established database table;

[0013] Based on the tracking data in the database table, an optimization algorithm is used to solve the dynamic material layer trajectory equation, and based on the dynamic material layer trajectory equation, the material layer shape is obtained;

[0014] Based on the dynamic material layer trajectory equation and the material layer shape, the material surface shape and material layer trajectory of all current material layers in the blast furnace are determined, and all material surface shapes and the material layer trajectory in the blast furnace at the current moment are dynamically displayed for monitoring.

[0015] According to a method for monitoring dynamic changes of a material layer in a blast furnace without bell distribution provided by the present invention, the method of determining the movement trajectory parameters of the material based on the parameter data set includes:

[0016] Based on the parameter data set, determine the speed of the charge at the end of the chute, the distance from the charge pile tip to the end of the chute in the horizontal direction of the axis, and the horizontal distance from the charge landing point to the center line of the blast furnace;

[0017] The speed of the end of the chute, the distance of the axis in the horizontal direction, and the horizontal distance from the location of the charge landing to the center line of the blast furnace are used as the charge movement trajectory parameters.

[0018] According to a method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution provided by the present invention, based on the movement trajectory parameters of the charge, according to the law of the volume growth of the charge surface and the optimization iteration method, the charge surface equation of the single-ring charge after the single-ring charge is combined with the old charge surface is determined, including:

[0019] Establish a rectangular coordinate system;

[0020] Based on the rectangular coordinate system, the volume of each ring of charge is determined according to the batch weight of the charge and the bulk density of the charge;

[0021] Determine the outer stack angle of the charge according to the horizontal distance from the charge landing point to the center line of the blast furnace and the natural stack angle of the charge;

[0022] Based on the volume of each ring of charge and the outer pile angle of the charge, the volume growth law of the charge surface and the optimization iterative method are used to determine the intersection of the charge surface and the old charge surface after the single ring of charge is placed on the old charge, and fit it with the position of the pile tip to form the charge surface equation of the single ring of charge after the single ring of charge is combined with the old charge surface.

[0023] According to a method for monitoring dynamic changes of material layers in a blast furnace without bell distribution provided by the present invention, the material surface shape after multi-ring distribution is iteratively calculated based on the material surface equation to obtain a blast furnace distribution model, including:

[0024] Based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated until the maximum ring position of the blast furnace charging is reached, and then the iterative calculation at the current material layer is terminated to obtain the blast furnace charging model.

[0025] According to a method for monitoring dynamic changes of a material layer in a blast furnace without bell distribution provided by the present invention, the tracking data of the material layer of the furnace is updated based on the blast furnace distribution model, including:

[0026] Dynamically track the coordinates of the edge points, pile tips and center points of a batch of ore or coke;

[0027] During the process of placing each batch of furnace materials, the coordinate changes of the edge points, pile tips and center points of each batch of materials are calculated and recorded in real time;

[0028] The coordinate change results are used as tracking data of charge distribution and stored in a pre-established database table;

[0029] Determine the equation of the curve formed by the edge point along the blast furnace throat to the side of the furnace body and track its movement;

[0030] Determine the vertical movement of the pile tip at the furnace throat and the horizontal movement trajectory at the furnace body, and track its dynamic changes;

[0031] Determine the vertical downward motion trajectory of the center point and track its changes.

[0032] According to a method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution provided by the present invention, the tracking data of the updated material layer of the furnace is stored in a pre-established database table, comprising:

[0033] Pre-establish a database table; among them,

[0034] The number of data items contained in the database table is a preset number, which is dynamically calculated based on the effective volume of the blast furnace and the volume of the batch of materials;

[0035] The number of each data in the database table corresponds to the number of the charge;

[0036] When a new batch of materials is put into the furnace, the data in the database table is updated;

[0037] When the storage time of the oldest data in the database table exceeds the current smelting cycle, or when new data is added to the database table and the amount of data in the table exceeds the preset number of entries, the oldest data in the database table is automatically deleted.

[0038] According to a method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution provided by the present invention, the method adopts an optimization algorithm to solve the dynamic material layer trajectory equation based on the tracking data in the database table, and obtains the material layer shape based on the dynamic material layer trajectory equation, including:

[0039] According to the principle of constant volume of the material layer in the furnace, each tracking data in the dynamic material layer trajectory equation is re-solved using an optimization algorithm to ensure that the volume of the curve formed by the edge points, pile tips and center points after dynamic changes, which rotates around the center line of the blast furnace, matches the volume of the batch of ore or coke entering the furnace when entering the furnace;

[0040] Through the re-solved tracking data, a quadratic fit is performed to determine the material surface equation of the charge in dynamic motion as the dynamic material layer trajectory equation;

[0041] Based on the dynamic material layer trajectory equation, the shape of the material layer is determined.

[0042] According to a method for monitoring dynamic changes of material layers in a blast furnace without bell distribution provided by the present invention, the parameter data set includes at least one of the following:

[0043] Charging matrix, batch weight of charging, characteristics of charging, latest blast furnace charging surface shape data, elevation of chute hanging point, chute length, chute friction coefficient, chute tilting distance, distance from the end of the chute to the zero material line in the vertical condition, furnace throat radius, furnace body height, furnace waist height, furnace bosh height, furnace bosh angle, furnace body angle, effective volume, relationship between discharge flow rate and opening of material flow regulating valve, average ore particle size, average coke particle size, natural ore heap angle, and natural coke heap angle.

[0044] On the other hand, the present invention also provides a monitoring device for the internal distribution state of a blast furnace without bell distribution, comprising:

[0045] The acquisition module is used to collect parameter data sets related to the blast furnace bell-free burden distribution;

[0046] A motion trajectory module, used for determining the motion trajectory parameters of the charge based on the parameter data set;

[0047] A material surface equation module is used to determine the material surface equation after the single-ring material and the old material surface are combined based on the movement trajectory parameters of the material surface, according to the material surface volume growth law and the optimization iteration method;

[0048] A model module is used to iteratively calculate the material surface shape after multi-ring charging based on the material surface equation to obtain a blast furnace charging model; wherein the blast furnace charging model is used to describe the material surface shape of the blast furnace after multi-ring charging;

[0049] An updating module, used for updating the tracking data of the charge layer of the blast furnace based on the blast furnace charge distribution model to reflect the latest status of the charge layer in the furnace;

[0050] A storage module, used for storing updated tracking data of the charge layer into a pre-established database table;

[0051] A material layer shape module, used to solve the dynamic material layer trajectory equation based on the tracking data in the database table by using an optimization algorithm, and obtain the material layer shape based on the dynamic material layer trajectory equation;

[0052] The monitoring module is used to determine the material surface shape and material layer trajectory of all current material layers in the blast furnace based on the dynamic material layer trajectory equation and the material layer shape, and dynamically display all material surface shapes and the material layer trajectory in the blast furnace at the current moment for monitoring.

[0053] On the other hand, the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution as described in any one of the above is implemented.

[0054] The present invention provides a method, device and equipment for monitoring dynamic changes of the material layer in a blast furnace without bell distribution. Based on the charge movement trajectory parameters, according to the law of material surface volume growth and an optimization iterative method, a material surface equation after a single-ring charge is combined with an old material surface is determined; based on the material surface equation, the material surface shape after multi-ring charge distribution is iteratively calculated to obtain a blast furnace charging model; based on the blast furnace charging model, tracking data of the charge layer is updated to reflect the latest status of the material layer in the furnace; the updated tracking data of the charge layer is stored in a pre-established database table; based on the tracking data in the database table, an optimization algorithm is used to solve the dynamic material layer trajectory equation, and based on the dynamic material layer trajectory equation, the material layer shape is obtained; based on the dynamic material layer trajectory equation and the material layer shape, the material surface shape and material layer trajectory of all current material layers in the blast furnace are determined, and all material surface shapes and material layer trajectories in the blast furnace at the current moment are dynamically displayed for monitoring. This embodiment collects key parameters, determines the parameters of the charge movement trajectory, establishes the charge surface equation and the charge distribution model, thereby achieving real-time monitoring and dynamic tracking of the charge distribution status such as the charge surface shape and the charge layer trajectory inside the blast furnace, thereby improving the charge distribution accuracy and the stability of the blast furnace operation, and also helping to improve the charge distribution efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1 It is a schematic flow chart of a method for monitoring dynamic changes of material layers in a blast furnace without bell distribution provided by an embodiment of the present invention;

[0057] Figure 2 It is a structural schematic diagram of a device for monitoring dynamic changes of material layers in a blast furnace without bell distribution provided by an embodiment of the present invention;

[0058] Figure 3 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Figure 1 The present invention provides a flow chart of a method for monitoring the dynamic changes of the material layer in a blast furnace without bell distribution. The execution subject of the method can be a computer, a mobile phone or a smart wearable device.

[0061] See also Figure 1 The method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution includes the following steps.

[0062] 101. Collect parameter data sets related to blast furnace bell-free burden distribution.

[0063] In this step, the parameter data set includes at least one of the following:

[0064] The distribution matrix, batch weight of incoming charge, characteristics of incoming charge, the latest blast furnace charge surface shape data, elevation of the chute hanging point, chute length, chute friction coefficient, chute tilting distance, distance from the end of the chute to the zero material line in the vertical case, furnace throat radius, furnace body height, furnace waist height, furnace belly height, furnace belly angle, furnace body angle, effective volume, relationship between discharge flow and opening of the material flow regulating valve, average ore particle size, average coke particle size, natural ore heap angle, and natural coke heap angle. Distribution matrix: It involves the distribution mode and sequence, which may include the angle, number of circles, and distribution weight of each gear. These parameters determine the specific distribution of the charge in the furnace and the distribution volume of each gear. The characteristics of the incoming charge may include the average particle size and natural heap angle of ore and coke, which affect the stacking form and charge surface shape of the charge. The chute tilting distance may refer to the horizontal movement distance of the chute when it tilts, which affects the position of the charge landing point. Those skilled in the art can understand the meaning of the above parameters, and there is no ambiguity.

[0065] 102. Determine the parameters of the charge movement trajectory based on the parameter data set.

[0066] In this step, the parameters of the charge movement trajectory are determined based on the parameter data set, including:

[0067] Based on the parameter data set, determine the speed of the charge at the end of the chute, the distance from the charge pile tip to the end of the chute in the horizontal direction of the axis, and the horizontal distance from the charge drop point to the center line of the blast furnace;

[0068] The speed at the end of the chute, the horizontal distance of the axis, and the horizontal distance from the charge landing point to the center line of the blast furnace are taken as the charge movement trajectory parameters.

[0069] Speed ​​at the end of the chute It can be expressed by the following formula (1);

[0070] The distance L from the top of the charge pile to the end of the chute in the horizontal direction of the axis X It can be expressed by formula (2);

[0071] The horizontal distance n from the charge landing point to the center line of the blast furnace can be expressed by formula (3). (1) (2) (3)

[0072] In the above formula, is the effective length of the chute, in units ; is the chute tilting distance, unit ; is the friction coefficient of the chute; is the chute rotation angular velocity, unit ; Depth of material line, unit In the above formula, the velocity loss after the charge collides with the chute is also taken into account. g represents the acceleration due to gravity. It represents the inclination of the chute, that is, the angle between the chute and the vertical direction. v1 represents the speed of the charge when it enters the chute, that is, the speed at the beginning of the chute.

[0073] 103. Based on the trajectory parameters of the charge movement, the volume growth law of the charge surface and the optimization iterative method, determine the charge surface equation after the single-ring charge and the old charge surface are combined.

[0074] In this step, based on the charge movement trajectory parameters, according to the charge surface volume growth law and the optimization iteration method, the charge surface equation of the single-ring charge after the single-ring charge and the old charge surface are combined is determined, including:

[0075] Establish a rectangular coordinate system; in which the chute hanging point can be taken as the center of the circle and the blast furnace horizontal plane is Axis, the center line of blast furnace is The axes establish a rectangular coordinate system;

[0076] Based on the rectangular coordinate system, the volume of each ring of charge is determined according to the batch weight and the bulk density of the charge;

[0077] Determine the outer stack angle of the charge according to the horizontal distance from the charge landing point to the center line of the blast furnace and the natural stack angle of the charge;

[0078] Based on the volume of each ring of charge and the outer pile angle of the charge, the volume growth law of the charge surface and the optimization iterative method are used to determine the intersection of the charge surface and the old charge surface after the single ring of charge is placed on the old charge, and fit it with the position of the pile tip to form the charge surface equation of the single ring of charge after the single ring of charge is combined with the old charge surface.

[0079] This step improves the accuracy of the charge model by establishing a rectangular coordinate system, calculating the charge volume and external stack angle, and using an optimization iteration method to accurately determine the charge surface equation after the single-ring charge and the old charge surface are combined. The charge surface volume growth law (charge surface volume growth principle) is implemented under the consideration that the charge landing point position remains unchanged and the internal and external stack angles remain unchanged. The old charge surface can refer to the charge with an earlier charge time, and the new charge surface can refer to the charge with a later charge time.

[0080] 104. Based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated to obtain a blast furnace charging model; wherein the blast furnace charging model is used to describe the material surface shape of the blast furnace after multi-ring charging.

[0081] In this step, based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated to obtain the blast furnace charging model, including:

[0082] Based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated until the maximum ring position of the blast furnace charging is reached. Then the iterative calculation at the current material layer is terminated to obtain the blast furnace charging model.

[0083] In this step, the new material surface equation after the previous ring of distribution is completed can be made the old material surface equation, and the shape of the charge distributed in the current ring will be covered on the old material surface equation. The position of the tip of the old material surface will be considered during the covering process. If the outer corner position of the new charge is higher than the tip of the old charge, part of the new charge will cover the tip of the old charge; if this does not happen, the new charge will be attached to and covered on the side of the tip of the old charge close to the center of the blast furnace. This iteration is repeated until the maximum ring position of the blast furnace distribution ends, and finally a batch of ore (coke) distribution completes the material surface equation and material layer shape. By iteratively calculating the material surface shape after multiple rings of distribution until the maximum ring position of the blast furnace distribution ends, a complete blast furnace distribution model is obtained, providing model support for comprehensive monitoring of the internal distribution status of the blast furnace.

[0084] 105. Based on the blast furnace burden model, update the tracking data of the burden layer to reflect the latest status of the burden layer in the furnace.

[0085] 106. Store the updated tracking data of the charge layer into a pre-established database table.

[0086] 107. Based on the tracking data in the database table, an optimization algorithm is used to solve the dynamic material layer trajectory equation, and based on the dynamic material layer trajectory equation, the material layer shape is obtained.

[0087] 108. Based on the dynamic material layer trajectory equation and material layer shape, determine the material surface shape and material layer trajectory of all current material layers in the blast furnace, and dynamically display all material surface shapes and material layer trajectories in the blast furnace at the current moment for monitoring.

[0088] In this embodiment, based on the charge movement trajectory parameters, according to the charge surface volume growth law and the optimization iterative method, the charge surface equation after the single-ring charge and the old charge surface are combined is determined; based on the charge surface equation, the charge surface shape after multi-ring charge distribution is iteratively calculated to obtain the blast furnace charge distribution model; based on the blast furnace charge distribution model, the tracking data of the charge layer is updated to reflect the latest status of the charge layer in the furnace; the updated tracking data of the charge layer is stored in a pre-established database table; based on the tracking data in the database table, the dynamic charge layer trajectory equation is solved by an optimization algorithm, and based on the dynamic charge layer trajectory equation, the charge layer shape is obtained; based on the dynamic charge layer trajectory equation and the charge layer shape, the charge surface shape and charge layer trajectory of all current charge layers in the blast furnace are determined, and the charge surface shape and the charge layer trajectory of the blast furnace at the current moment are dynamically displayed for monitoring. This embodiment collects key parameters, determines the parameters of the charge movement trajectory, establishes the charge surface equation and the charge distribution model, thereby achieving real-time monitoring and dynamic tracking of the charge distribution status such as the charge surface shape and the charge layer trajectory inside the blast furnace, thereby improving the charge distribution accuracy and the stability of the blast furnace operation, and also helping to improve the charge distribution efficiency.

[0089] In one embodiment of the present invention, updating the tracking data of burden distribution based on the blast furnace burden distribution model includes:

[0090] Dynamically track the coordinates of the edge points, pile tips and center points of a batch of ore or coke;

[0091] During the process of placing each batch of furnace materials, the coordinate changes of the edge points, pile tips and center points of each batch of materials are calculated and recorded in real time;

[0092] The coordinate change results are used as tracking data of charge distribution and stored in a pre-established database table;

[0093] Determine the equation of the curve formed by the edge point along the blast furnace throat to the side of the furnace body and track its movement;

[0094] Determine the vertical movement of the pile tip at the furnace throat and the horizontal movement trajectory at the furnace body, and track its dynamic changes;

[0095] Determine the vertical downward motion trajectory of the center point and track its changes.

[0096] In this embodiment, the coordinate change results can be stored in the database. By dynamically tracking the coordinate changes of edge points, pile tips and center points, and updating the database in real time, real-time monitoring and dynamic tracking of charge distribution are achieved, providing data reference and support for timely adjustment of charge distribution strategies.

[0097] Based on the classic two-segment line material layer shape model, the coordinates of the edge points, pile tips and center points of the batch ore or batch coke are dynamically tracked. "Based on the classic two-segment line material layer shape model" refers to a simplified method used in the blast furnace charging model to describe and predict the shape of the charge distribution in the furnace. This model usually simplifies the distribution shape of the charge into a figure composed of two straight lines to simulate the movement and distribution of the charge in the furnace. Specifically:

[0098] Composition of the two-segment line model: This model considers the distribution of the charge as consisting of two main parts, one is the edge of the charge, and the other is the center of the charge. These two parts are connected by a straight line to form a simple two-segment line figure to simulate the distribution of the charge.

[0099] Application of the model: In practical applications, this model can help blast furnace operators qualitatively and quantitatively understand, analyze and control the distribution of charge in the furnace, thereby ensuring the rationality of the charge distribution structure, good charge permeability and stability of charge descent.

[0100] Effect of the model: Using this model can effectively ensure that the coal gas is in full contact with the charge, so as to maximize the use of the thermal and chemical energy of the coal gas, improve the smelting conditions of the blast furnace, increase the permeability index of the charge column, reduce the coke ratio, and provide a powerful means for the blast furnace to produce high-quality, low-consumption, high-yield, long-life and stable energy.

[0101] Calculation of the model: In the process of calculating the material flow trajectory, the collision coefficient between the material and the chute and the friction coefficient of the material when moving on the chute are corrected at the same time, and the influence of the gas flow on the small-size ore is taken into account in order to calculate a more accurate material velocity; when calculating the material surface shape, based on the material pile angle formation process, a nonlinear equation is obtained, and the material surface equation is calculated through iteration.

[0102] The calculation method of the descending or lateral movement speed of the charge in the furnace throat and furnace body is shown in the following formula (4), formula (5) and formula (6).

[0103] (4);

[0104] (5);

[0105] (6) Among them, The total volume of materials put into the furnace during the day and night, in units of ; is the furnace throat diameter, in units of , is the blast furnace shaft angle, in units of ; is the velocity at the furnace throat; is the longitudinal velocity of the furnace body; is the horizontal velocity of the furnace body.

[0106] In one embodiment of the present invention, the updated tracking data of the charge layer is stored in a pre-established database table, including:

[0107] Pre-establish a database table; among them,

[0108] The number of data items contained in the database table is a preset number M, which is dynamically calculated based on the effective volume of the blast furnace and the batch volume;

[0109] The number of each data in the database table corresponds to the number of the charge;

[0110] When a new batch of materials is put into the furnace, the data in the database table is updated;

[0111] When the storage time of the oldest data in the database table exceeds the current smelting cycle, or when new data is added to the database table and the amount of data in the table exceeds the preset number M, the oldest data in the database table is automatically deleted.

[0112] In this embodiment, specifically, a dynamic change table of material layer trajectory parameters in the furnace is to be established in the database, and the data contained in the table is Article (dynamic calculation based on the effective volume of the blast furnace and the batch volume), The data corresponds to The dynamic change parameters of the layer charge trajectory are triggered and updated once a new batch of materials is put into the furnace, and if the first The data in the database exists for longer than the current smelting cycle or the After a piece of data enters the data table, the smallest i-th piece of data will be deleted accordingly to ensure that the database always has By pre-establishing database tables and updating data regularly, timely updating and effective management of charge distribution data are ensured, thus improving the timeliness and reliability of data.

[0113] In one embodiment of the present invention, based on the tracking data in the database table, an optimization algorithm is used to solve the dynamic material layer trajectory equation, and based on the dynamic material layer trajectory equation, the material layer shape is obtained, including:

[0114] According to the principle of constant volume of the material layer in the furnace, each tracking data in the dynamic material layer trajectory equation is re-solved using an optimization algorithm to ensure that the volume of the curve formed by the edge points, pile tips and center points after dynamic changes, which rotates around the center line of the blast furnace, matches the volume of the batch of ore or coke entering the furnace when entering the furnace;

[0115] Through the re-solved tracking data, a quadratic fit is performed to determine the material surface equation of the charge in dynamic motion as the dynamic material layer trajectory equation;

[0116] Based on the dynamic material layer trajectory equation, the shape of the material layer is determined.

[0117] In this embodiment, an optimization algorithm is used to re-solve the material layer trajectory parameters (that is, tracking data), and a quadratic fit is performed to ensure that the material layer trajectory equation after dynamic changes matches the actual charge volume, thereby improving the accuracy of the material layer shape prediction. Although there is no clear or specific formula here, since the blast furnace is similar to a cylindrical container, the volume of each batch of materials entering the furnace is constant, and the volume in the container is naturally unchanged, forming a layer of charge in the container. From a mathematical point of view, the container is divided from the middle, assuming that the general equation curve is y(x), where x represents the horizontal distance from the center line of the blast furnace to the edge of the cross section, and y represents the vertical height corresponding to x, then its volume after rotating one circle along the center line of the blast furnace should be equal to the volume entering the furnace.

[0118] In some other embodiments of the present invention, based on the dynamic material layer trajectory equation and the material layer shape, the blast furnace material surface shape and material layer trajectory are determined, and the blast furnace material surface shape and material layer trajectory are displayed for monitoring, including:

[0119] According to the parameters involved in the material surface equation stored in the database, computer technology and database technology are used to mark the various parameters of the material surface shape in a hidden manner on the interface;

[0120] Dynamically change the movement of the material layer to realize the visualization of blast furnace material surface shape calculation and dynamic tracking of the material layer trajectory.

[0121] In summary, the key technical points of the present invention are:

[0122] 1. Considering the movement process of the charge from leaving the charge tank to falling into the old charge surface, a single-ring charge surface equation calculation model without clock distribution is established; and the shape and equation calculation of the entire batch of charge surfaces are realized after the ore or coke distribution is completed by using the charge surface superposition principle.

[0123] 2. According to the trajectory and boundary conditions of the blast furnace charge’s descent, the dynamic changes of the charge layer at the edge, top, center of the charge at the throat and furnace body are considered, and the key points of the descent charge layer are updated in real time.

[0124] 3. Utilize database storage and iterative optimization methods to refit the material surface equation and shape after the dynamic changes of key points of the material layer, and realize dynamic tracking of the material layer trajectory.

[0125] 4. Through computer technology and database technology, the calculation of blast furnace material surface shape and dynamic tracking of material layer trajectory are visualized, and the material layer distribution in the furnace is dynamically and real-time changed according to actual changes to provide reference for the site.

[0126] The present invention establishes the equation of the charge movement trajectory before the charge leaves the charge tank and falls into the old charge surface in the furnace, which conforms to the blast furnace charge distribution law and is close to the actual situation on site. Using the principle of the charge landing point position and the charge volume growth, the single-loop charge surface equation is calculated by the optimization method, and the charge surface shape after the single-loop charge distribution is calculated. Based on the research foundation of single-loop charge distribution, the new and old charge surface replacement method is used to calculate the complete charge surface equation and charge surface shape of the ore batch or coke batch after the charge surface is superimposed. By analyzing the descending process of the charge layer in the furnace under actual smelting conditions, the database storage technology is used to store the dynamically updated coordinates of the edge, pile tip, and center of each batch of charge layers, and then the charge layer shape and descending equation during the descending process are fitted, which serves the purpose of charge rule tracking. On this basis, the invention can use computer technology to visualize the distribution of the charge layer in the furnace, provide a charge distribution reference for the blast furnace production site, help the site to adjust the production policy in advance, and provide a guarantee for the smooth operation of the blast furnace and the cost reduction and efficiency improvement of the enterprise. The optimization method generally includes genetic algorithms and gradient optimization algorithms.

[0127] Based on the same general inventive concept, the present invention also protects a device for monitoring dynamic changes of the material layer in a blast furnace without bell distribution, such as Figure 2 As shown, Figure 2 It is a schematic diagram of the structure of the device for monitoring the dynamic changes of the material layer in a blast furnace without bell distribution provided by an embodiment of the present invention. The device for monitoring the dynamic changes of the material layer in a blast furnace without bell distribution provided by the present invention is described below, and the device for monitoring the dynamic changes of the material layer in a blast furnace without bell distribution described below and the method for monitoring the dynamic changes of the material layer in a blast furnace without bell distribution described above can be referred to each other.

[0128] The device for monitoring dynamic changes of the material layer in a blast furnace without bell distribution includes a collection module 201, a motion trajectory module 202, a material surface equation module 203, a model module 204, an update module 205, a storage module 206, a material layer shape module 207 and a monitoring module 208.

[0129] The acquisition module 201 is used to collect parameter data sets related to blast furnace bell-free charging;

[0130] The motion trajectory module 202 is used to determine the parameters of the motion trajectory of the charge based on the parameter data set;

[0131] The material surface equation module 203 is used to determine the material surface equation after the single-ring material and the old material surface are combined based on the movement trajectory parameters of the furnace charge, according to the material surface volume growth law and the optimization iteration method;

[0132] The model module 204 is used to iteratively calculate the material surface shape after multi-ring charging based on the material surface equation to obtain a blast furnace charging model; wherein the blast furnace charging model is used to describe the material surface shape of the blast furnace after multi-ring charging;

[0133] The updating module 205 is used to update the tracking data of the charge layer based on the blast furnace charge distribution model to reflect the latest status of the charge layer in the furnace;

[0134] The storage module 206 is used to store the updated tracking data of the charge layer into a pre-established database table;

[0135] The material layer shape module 207 is used to solve the dynamic material layer trajectory equation based on the tracking data in the database table by using an optimization algorithm, and obtain the material layer shape based on the dynamic material layer trajectory equation;

[0136] The monitoring module 208 is used to determine the material surface shape and material layer trajectory of all current material layers in the blast furnace based on the dynamic material layer trajectory equation and the material layer shape, and dynamically display all material surface shapes and the material layer trajectory in the blast furnace at the current moment for monitoring.

[0137] Figure 3 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 3 As shown, the electronic device may include: a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the method for monitoring the dynamic change of the material layer in the blast furnace without bell distribution.

[0138] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0139] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for monitoring the dynamic changes of the material layer in the blast furnace without bell distribution provided by the above methods.

[0140] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the method for monitoring dynamic changes of the material layer in a blast furnace with bell-free distribution provided by the above-mentioned methods.

[0141] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0142] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0143] Finally, it should be noted that the above embodiments 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring dynamic changes of material layers in a blast furnace without bell distribution, characterized in that: include: Collect parameter data sets related to blast furnace bell-free burden distribution; Determining the parameters of the charge movement trajectory based on the parameter data set; Based on the movement trajectory parameters of the charge, according to the volume growth law of the charge surface and the optimization iteration method, the charge surface equation after the single-ring charge and the old charge surface are combined is determined; Based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated to obtain a blast furnace charging model; wherein the blast furnace charging model is used to describe the material surface shape of the blast furnace after multi-ring charging; Based on the blast furnace burden distribution model, updating the tracking data of the burden layer to reflect the latest status of the burden layer in the furnace; storing updated charge layer tracking data into a pre-established database table; Based on the tracking data in the database table, an optimization algorithm is used to solve the dynamic material layer trajectory equation, and based on the dynamic material layer trajectory equation, the material layer shape is obtained; Based on the dynamic material layer trajectory equation and the material layer shape, determine the material surface shape and material layer trajectory of all current material layers in the blast furnace, and dynamically display all material surface shapes and the material layer trajectory in the blast furnace at the current moment for monitoring; Wherein, determining the charge movement trajectory parameters based on the parameter data set includes: Based on the parameter data set, determine the speed of the charge at the end of the chute, the distance from the charge pile tip to the end of the chute in the horizontal direction of the axis, and the horizontal distance from the charge landing point to the center line of the blast furnace; The speed of the end of the chute, the distance in the horizontal direction of the axis, and the horizontal distance from the location of the charge landing to the center line of the blast furnace are used as the charge movement trajectory parameters; The material surface equation of the single-ring charge after the single-ring charge is combined with the old material surface is determined based on the charge movement trajectory parameters, according to the material surface volume growth law and the optimization iteration method, including: Establish a rectangular coordinate system; Based on the rectangular coordinate system, the volume of each ring of charge is determined according to the batch weight of the charge and the bulk density of the charge; Determine the outer stack angle of the charge according to the horizontal distance from the charge landing point to the center line of the blast furnace and the natural stack angle of the charge; Based on the volume of each ring of charge and the outer pile angle of the charge, the material surface volume growth law and the optimization iteration method are adopted to determine the intersection of the material surface and the old material surface after the single ring of charge is laid on the old material, and fit it with the pile tip position to form the material surface equation of the single ring of charge after the single ring of charge is combined with the old material surface; The material surface shape after multi-ring charging is iteratively calculated based on the material surface equation to obtain a blast furnace charging model, including: Based on the material surface equation, the material surface shape after multi-ring charging is iteratively calculated until the maximum ring position of the blast furnace charging is reached, and then the iterative calculation at the current material layer is terminated to obtain the blast furnace charging model.

2. The method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution according to claim 1 is characterized in that: The updating of the tracking data of the charge layer based on the blast furnace charge distribution model includes: Dynamically track the coordinates of the edge points, pile tips and center points of a batch of ore or coke; During the process of placing each batch of furnace materials, the coordinate changes of the edge points, pile tips and center points of each batch of materials are calculated and recorded in real time; The coordinate change results are used as tracking data of charge distribution and stored in a pre-established database table; Determine the equation of the curve formed by the edge point along the blast furnace throat to the side of the furnace body and track its movement; Determine the vertical movement of the pile tip at the furnace throat and the horizontal movement trajectory at the furnace body, and track its dynamic changes; Determine the vertical downward motion trajectory of the center point and track its changes.

3. The method for monitoring dynamic changes of material layers in a blast furnace without bell distribution according to claim 2, characterized in that: The step of storing the updated tracking data of the charge layer into a pre-established database table includes: Pre-establish a database table; among them, The number of data items contained in the database table is a preset number, which is dynamically calculated based on the effective volume of the blast furnace and the volume of the batch of materials; The number of each data in the database table corresponds to the number of the charge; When a new batch of materials is put into the furnace, the data in the database table is updated; When the storage time of the oldest data in the database table exceeds the current smelting cycle, or when new data is added to the database table and the amount of data in the table exceeds the preset number of entries, the oldest data in the database table is automatically deleted.

4. The method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution according to claim 3 is characterized in that: The method of solving the dynamic material layer trajectory equation based on the tracking data in the database table by using an optimization algorithm and obtaining the material layer shape based on the dynamic material layer trajectory equation includes: According to the principle of constant volume of the material layer in the furnace, each tracking data in the dynamic material layer trajectory equation is re-solved using an optimization algorithm to ensure that the volume of the curve formed by the edge points, pile tips and center points after dynamic changes, which rotates around the center line of the blast furnace, matches the volume of the batch of ore or coke entering the furnace when entering the furnace; Through the re-solved tracking data, a quadratic fit is performed to determine the material surface equation of the charge in dynamic motion as the dynamic material layer trajectory equation; Based on the dynamic material layer trajectory equation, the shape of the material layer is determined.

5. The method for monitoring dynamic changes of material layers in a blast furnace without bell distribution according to claim 1, characterized in that: The parameter data set includes at least one of the following: Charging matrix, batch weight of charging, characteristics of charging, latest blast furnace charging surface shape data, elevation of chute hanging point, chute length, chute friction coefficient, chute tilting distance, distance from the end of the chute to the zero material line in the vertical condition, furnace throat radius, furnace body height, furnace waist height, furnace bosh height, furnace bosh angle, furnace body angle, effective volume, relationship between discharge flow rate and opening of material flow regulating valve, average ore particle size, average coke particle size, natural ore heap angle, and natural coke heap angle.

6. A device for monitoring dynamic changes of material layers in a blast furnace without bell distribution, characterized in that: The device uses the method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution according to any one of claims 1 to 5, and the device comprises: The acquisition module is used to collect parameter data sets related to the blast furnace bell-free burden distribution; A motion trajectory module, used for determining the motion trajectory parameters of the charge based on the parameter data set; A material surface equation module is used to determine the material surface equation after the single-ring material and the old material surface are combined based on the movement trajectory parameters of the material surface, according to the material surface volume growth law and the optimization iteration method; A model module is used to iteratively calculate the material surface shape after multi-ring charging based on the material surface equation to obtain a blast furnace charging model; wherein the blast furnace charging model is used to describe the material surface shape of the blast furnace after multi-ring charging; An updating module, used for updating the tracking data of the charge layer of the blast furnace based on the blast furnace charge distribution model to reflect the latest status of the charge layer in the furnace; A storage module, used for storing updated tracking data of the charge layer into a pre-established database table; A material layer shape module, used to solve the dynamic material layer trajectory equation based on the tracking data in the database table by using an optimization algorithm, and obtain the material layer shape based on the dynamic material layer trajectory equation; The monitoring module is used to determine the material surface shape and material layer trajectory of all current material layers in the blast furnace based on the dynamic material layer trajectory equation and the material layer shape, and dynamically display all material surface shapes and the material layer trajectory in the blast furnace at the current moment for monitoring.

7. 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 program, the method for monitoring dynamic changes of the material layer in a blast furnace without bell distribution as described in any one of claims 1 to 5 above is implemented.

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