CN110551861B - Method, system, equipment and storage medium for characterizing blast furnace burden surface shape - Google Patents
Method, system, equipment and storage medium for characterizing blast furnace burden surface shape Download PDFInfo
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- CN110551861B CN110551861B CN201910896999.5A CN201910896999A CN110551861B CN 110551861 B CN110551861 B CN 110551861B CN 201910896999 A CN201910896999 A CN 201910896999A CN 110551861 B CN110551861 B CN 110551861B
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Abstract
The invention provides a characterization method, a characterization system, characterization equipment and a characterization storage medium of blast furnace burden surface shape, wherein the method comprises the following steps: acquiring basic data, wherein the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of the bell-less furnace top; simulating a material flow track to calculate the material flow width and the position coordinates of a furnace charge drop point; calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape; and calculating a distribution index representing the shape of the charge level and the distribution matrix according to the charge level characteristic parameters. According to the invention, the charge level shape representation reference is provided for an operator in the upper regulation process by accurately representing the charge level shape and the distribution matrix information, so that the distribution system can be accurately and timely adjusted, the distribution of coal gas flow is improved, and the stable and smooth production of the blast furnace is realized.
Description
Technical Field
The invention relates to the technical field of blast furnace smelting control, in particular to a characterization method, a characterization system, characterization equipment and a characterization storage medium for a blast furnace burden surface shape.
Background
The upper regulating agent is to obtain reasonable gas flow distribution by controlling the combustion zone at the lower part and the soft melting zone at the middle part under the condition of certain furnace type and raw material physical properties. In the blast furnace throat, the distribution of the coal gas is mainly determined by the distribution of the charging materials, so that the distribution of the coal gas can be controlled through distribution. The charging system forms a reasonable charge surface shape by adjusting the distribution ratio of ores and coke in the radial direction of the blast furnace, influences the shape formation of a reflow zone and further influences the distribution of gas flow in the furnace and the stable smooth operation of the blast furnace.
The shape of the charge level is related to a plurality of factors such as furnace top equipment parameters, a charging system, furnace charge characteristics and the like, however, the traditional model and experiment only give the two-dimensional shape of the charge level, the adjustment of the distribution matrix still depends on experience and intuition, and the distribution cannot be accurately controlled, so that the stable operation of the blast furnace is difficult to ensure.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a method, a system, a device and a storage medium for characterizing the shape of a charge level of a blast furnace, which are used for solving the problem that the shape of the charge level cannot be characterized in the prior art, which causes difficulty in stable operation of the blast furnace.
To achieve the above and other related objects, in a first aspect of the present application, there is provided a method for characterizing blast furnace burden surface shape, comprising:
acquiring basic data, wherein the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of the bell-less furnace top;
simulating a material flow track to calculate the material flow width and the position coordinates of a furnace charge drop point;
calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape;
and calculating a distribution index representing the shape of the charge level and the distribution matrix according to the charge level characteristic parameters.
In a second aspect of the present application, there is provided a system for characterizing blast furnace burden surface shape, comprising:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring basic data, and the basic data comprises equipment parameters of a bell-less furnace top, furnace burden characteristic parameters and a charging matrix;
the first calculation module is used for simulating a material flow track to calculate the material flow width and the coordinates of the furnace burden drop point;
the second calculation module is used for calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape;
and the charge level characterization module is used for calculating a material distribution index for characterizing the charge level shape and the material distribution matrix according to the charge level characteristic parameters.
In a third aspect of the present application, there is provided an electronic device comprising:
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors to execute the instructions, the one or more processors executing the instructions to cause the electronic device to perform the above-described method of characterizing blast furnace burden surface shape.
In a fourth aspect of the present application, a storage medium is provided that stores at least one program, wherein the at least one program, when invoked, performs the above method for characterizing a shape of a charge level of a blast furnace.
As mentioned above, the method, the system, the equipment and the storage medium for characterizing the shape of the blast furnace burden surface have the following beneficial effects:
according to the invention, the charge level shape representation reference is provided for an operator in the upper regulation process by accurately representing the charge level shape and the distribution matrix information, so that the distribution system can be accurately and timely adjusted, the distribution of coal gas flow is improved, and the stable and smooth production of the blast furnace is realized.
Drawings
FIG. 1 is a schematic view of a bell-less top distribution process provided by an embodiment of the present invention;
FIG. 2 is a flow chart of a method for characterizing blast furnace burden surface shapes according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for characterizing a blast furnace burden surface profile according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating a step S2 of the method for characterizing blast furnace burden surface shape according to the present invention;
FIG. 5 is a flowchart illustrating a step S3 of the method for characterizing blast furnace burden surface shape according to the present invention;
FIG. 6 is a schematic view of the parameters of the shape characteristics of the charge level provided in the embodiment of the present invention;
FIG. 7 is a flowchart illustrating a step S4 of the method for characterizing blast furnace burden surface shape according to the present invention;
FIG. 8 is a block diagram of a system for characterizing blast furnace burden surface shapes according to an embodiment of the present invention;
FIG. 9 is a block diagram illustrating an overall structure of a system for characterizing blast furnace burden surface shapes according to another embodiment of the present invention;
FIG. 10 is a block diagram illustrating a first computing module of a system for characterizing blast furnace burden surface shapes according to an embodiment of the present invention;
FIG. 11 is a block diagram illustrating a second computing module of the system for characterizing blast furnace burden surface shape according to the present invention;
FIG. 12 is a block diagram illustrating the structure of a level surface characterization module of the system for characterizing the shape of a blast furnace level provided in the embodiment of the present invention;
fig. 13 is a block diagram illustrating an apparatus structure of an industrial internet platform according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present application is provided for illustrative purposes, and other advantages and capabilities of the present application will become apparent to those skilled in the art from the present disclosure.
In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first preset threshold may be referred to as a second preset threshold, and similarly, the second preset threshold may be referred to as a first preset threshold, without departing from the scope of the various described embodiments. The first preset threshold and the preset threshold are both described as one threshold, but they are not the same preset threshold unless the context clearly indicates otherwise. Similar situations also include a first volume and a second volume.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C "are only exceptions to this definition should be done when combinations of elements, functions, steps or operations are inherently mutually exclusive in some manner.
Referring to fig. 1, a schematic diagram of a material distribution process of a bell-less furnace top according to an embodiment of the present invention is used to calculate a comprehensive material distribution index representing a shape of a material level and a material distribution matrix. The embodiment relates to a furnace charge distribution device which comprises material receiving tanks, a material flow valve, a central throat pipe, a chute, a furnace throat and other distribution links, simulates the movement of furnace charges in the equipment in sequence, and forms the shape of a final charge surface. And (4) extracting the charge level characteristic parameters according to the charge level shape, and calculating each distribution index.
In order to reduce the interference of other factors, the following assumptions are made for the material distribution process so as to characterize the material surface shape of the material distribution of the bell-less furnace top:
1) in the whole material distribution process, all furnace materials move by taking the material distribution element as a basic unit.
2) Neglecting the influence of the descending of the burden surface in the burden distribution process.
3) The gas flow is assumed to be uniform at the throat region.
4) Neglecting the left and right stock line deviation.
Referring to fig. 2, a flowchart of a method for characterizing a shape of a blast furnace burden surface according to an embodiment of the present invention includes:
step S1, acquiring basic data, wherein the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of the bell-less furnace top;
wherein, the equipment parameter of bell-less furnace roof includes: radius of furnace throat RthThrottle opening, central throat length lthChute length lrChute tilting distance htSliding chute friction coefficient murChute suspension point position hrAnd the chute rotation speed omegar. The furnace charge characteristic parameters comprise: bulk density ρ of the charge and angle of repose β of the charge. The matrix of charges includes: the batch weight M, the charging sequence, the distribution gear, the chute inclination angle theta corresponding to the gear and the distribution turn number N corresponding to the gearC，NO。
Step S2, simulating a material flow track to calculate material flow width and furnace charge placement position coordinates;
step S3, calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape;
and step S4, calculating a distribution index (wherein the distribution index comprises a comprehensive distribution index, an edge distribution index, a platform distribution index and a central distribution index) representing the shape of the charge level and a distribution matrix according to the charge level characteristic parameters.
In the implementation of the method, the representation reference of the shape of the shell fabric is provided for an operator in the upper regulation process through the accurate representation of the shape of the shell fabric and the distribution matrix information, so that the method is favorable for accurately and timely adjusting the distribution system, improving the distribution of gas flow and realizing the stable and smooth production of the blast furnace.
Referring to fig. 3, a complete flow chart of a method for characterizing a shape of a charge level of a blast furnace according to another embodiment of the present invention includes:
step S1, acquiring basic data, wherein the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of the bell-less furnace top;
step S2, simulating a material flow track to calculate material flow width and furnace charge placement position coordinates;
step S3, calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape;
step S4, calculating a distribution index representing the shape of the charge level and a distribution matrix according to the charge level characteristic parameters;
and step S5, adjusting the upper regulating agent by using the distribution index to control the distribution of the coal gas flow, wherein the distribution index comprises a comprehensive distribution index, an edge distribution index, a platform distribution index and a central distribution index.
Wherein, the step S5 specifically includes: the distribution index represents the ore-coke ratio and the airflow distribution of each point of the furnace burden in the radius direction of the furnace throat part, and the larger the distribution index is, the stronger the airflow at the edge is; the smaller the cloth index is, the stronger the central airflow is; and adjusting the upper regulating agent according to the distribution index to control the distribution of the gas flow. Only if the distribution index is ensured to be in a certain range and the gas flow is reasonably distributed, the utilization rate of the gas can be improved.
In the embodiment, the calculated distribution parameters are used as reference data for adjusting the upper regulating agent, so that the distribution index is ensured to be in a certain range, the distribution of the coal gas flow can be accurately controlled, the distribution of the coal gas flow is reasonable, and the utilization rate of the coal gas is improved.
Referring to fig. 4, a flow chart of step S2 of the method for characterizing blast furnace burden surface shape according to the embodiment of the present invention includes:
step S201, according to the material flow Q and the initial velocity upsilon of the furnace burden reaching the chute0Calculating the area of the furnace burden passing through the cross section of the chute in unit time according to the density rho of the furnace burden;
specifically, the area of the cross section of the chute is calculated by the following formula:
wherein S is the area of the cross section of the chute through which the charge material passes per unit time, m2；
Q- - -flow rate of the stream, t/s;
rho- - -burden density, t/m3；
υ0-initial velocity of the charge arriving at the chute, m/s;
step S202, according to the area of the furnace burden passing through the cross section of the chute in unit time, solving the angle alpha corresponding to the occupied area of the furnace burden material flow in the chute, and further solving the material flow width WfCorrecting the tilting distance of the chute;
specifically, the material flow width and the correction chute tilting distance are calculated by the following formulas:
wherein alpha is the angle and degree corresponding to the area occupied by the furnace burden material flow in the chute;
r- - -chute radius, m;
Wf-width of the stream, m;
step S203, according to the chute length lrChute angle theta and chute correction tilting distance ltWidth W of material flowfCalculating the speed upsilon of the burden reaching the end of the chute1；
Specifically, the speed of the furnace burden reaching the tail end of the chute is calculated by the following formula:
in the formula, u1-the velocity of the charge arriving at the chute, m/s;
theta-chute angle, °;
lr-chute length, m;
lt-chute pitch, m;
ωr-chute rotation speed, rad/s;
step S204, according to the velocity upsilon of the furnace burden reaching the end of the chute1Width W of material flowfHeight h of stock line, gas pressure PgCalculating the horizontal coordinate L of the falling point position of the furnace charge in the furnacef。
Specifically, the abscissa of the position of the falling point of the material in the furnace is calculated by the following formula:
in the formula, m0-mass m of cloth unit0＝ρLi 3，kg；
Pg-gas stream pressure, Pa;
in this embodiment, the abscissa of the position of the drop point of the furnace charge in the furnace is calculated according to the chute end speed, the material flow width, the burden line height and the gas pressure, and the drop point position of the furnace charge (ore and coke) can be calculated according to different burden line heights, different material flow widths and different gas pressures, so that the movement track of the material flow is obtained, and the shape of the burden surface can be conveniently represented subsequently.
Referring to fig. 5, a flow chart of step S3 of the method for characterizing blast furnace burden surface shape according to the embodiment of the present invention includes:
step S301, dividing the radius of the furnace throat into m equal parts to form material distribution elements, and dividing a material batch into n material distribution elements;
specifically, the material batch is divided into material distribution elements by using the following formula:
in the formula, Li- - -the side length of the cloth element, m;
Rth-throat diameter, m;
m < - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -settingfurnace throat dividing number;
step S302, constructing a basic charge level function, and forming a corresponding charge level shape under each gear;
specifically, the method is described by a three-section straight curve, the stacking tip is an arc with a radius of R, and two sides of the stacking tip are straight line sections, and the formula is as follows:
wherein R is the radius of the curve segment of the charge level function, m;
beta- -natural bulk angle of charge, °;
Δ β — corrected internal and external bank angle, °;
step S303, filling the material surface shape by the material distribution unit according to the number of turns of material distribution, switching to the next gear after the specified number of turns is filled, and superposing the material surface shapes of all gears until the material distribution of the furnace is finished to generate the final material surface shape;
step S304, according to the final charge level shape, extracting charge level characteristic parameters including funnel depth HfFunnel slope thetasWidth of edge WeWidth W of the platformpAnd center range material Wm。
In this embodiment, the finite element method is used to calculate the shape of the burden surface formed by the burden, and since the finite element method uses the expression form of the matrix, the problem can be described very simply, so that the method for solving the problem is standardized and convenientWhen a computer program is compiled, the high-speed operation and a large number of storage functions of the computer are fully utilized, the method is superior, the application range is wide, and the popularization is facilitated. In detail, as shown in fig. 6, the material surface shape characteristic parameter diagram provided by the embodiment of the invention passes through the depth H of the funnelfFunnel slope thetasWidth of edge WeWidth W of the platformpAnd center range material WmThe final charge level shape of the reaction can be relatively accurate.
Referring to fig. 7, a flow chart of step S4 of the method for characterizing blast furnace burden surface shape according to the embodiment of the present invention includes:
step S401, according to the edge width WeCalculating ore and coke edge distribution index B by using charge density rho and distribution matrixE；
Specifically, the ore and coke edge distribution index, i.e., the edge distribution index, is calculated using the following formula;
when L isi＞Rth-WeThe method comprises the following steps:
in the formula, BE-edge panel index;
Rth-throat radius;
We-the edge width of the charge level shape;
m- - - -the number of gears corresponding to the edge width;
Li-i grade charge drop point location;
NOi，NCi-i grade ore, coke number;
TO，TC-ore batch weight, coke batch weight;
ρO，ρC-ore, coke bulk density;
step S402According to the width W of the platformpCalculating the distribution index of the ore and coke platforms by using the burden density rho and the distribution matrix;
when R isth-We＞Li＞Rth-We-WpThe method comprises the following steps:
in the formula, BP-a table cloth index;
WP-the width of the deck in the shape of the charge level;
n- - -the number of gears corresponding to the width of the platform;
specifically, calculating a distribution index of the ore and coke platforms, namely a platform distribution index, by using the formula;
step S403, according to the central range WmCalculating the distribution index of the center of the ore and coke by using the burden density rho and the distribution matrix;
specifically, the central distribution index of the ore and coke, i.e., the central distribution index, is calculated by using the following formula;
when R isth-We-Wp＞LiThe method comprises the following steps:
in the formula, BM-a table cloth index;
t- - -maximum gear number;
and S404, calculating a comprehensive burden distribution index according to the burden density rho and the burden distribution matrix.
Specifically, a comprehensive cloth index is calculated by using the following formula;
in the formula, B-comprehensive cloth index;
in the embodiment, the shape of the charge level of the blast furnace is represented accurately through the distribution index, for example, the charge level shape and the distribution index of the distribution matrix, so that the problem that the traditional model and experiment only can reflect the two-dimensional shape of the fabric is effectively solved, the distribution is accurately controlled, and the stable and smooth operation of the blast furnace is ensured.
Referring to fig. 8, a structural block diagram of a system for characterizing a charge level shape of a blast furnace according to an embodiment of the present invention includes:
the system comprises an acquisition module 1, a storage module and a control module, wherein the acquisition module is used for acquiring basic data, and the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of a bell-less furnace top;
the first calculating module 2 is used for simulating a material flow track to calculate the material flow width and the coordinates of the furnace burden drop point;
the second calculation module 3 is used for calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape;
and the charge level characterization module 4 is used for calculating a distribution index for characterizing the charge level shape and the distribution matrix according to the charge level characteristic parameters.
Referring to fig. 9, a block diagram of a complete structure of a system for characterizing a charge level shape of a blast furnace according to another embodiment of the present invention includes:
the system comprises an acquisition module 1, a storage module and a control module, wherein the acquisition module is used for acquiring basic data, and the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of a bell-less furnace top;
the first calculating module 2 is used for simulating a material flow track to calculate the material flow width and the coordinates of the furnace burden drop point;
the second calculation module 3 is used for calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape;
the charge level characterization module 4 is used for calculating a charge level shape and a distribution index of a distribution matrix according to the charge level characteristic parameters;
and the upper regulating control module 5 is used for regulating the upper regulating by utilizing the distribution index so as to control the distribution of the gas flow.
The distribution index represents the ore-coke ratio and the airflow distribution of each point of the furnace burden in the radius direction of the furnace throat part, and the larger the distribution index is, the stronger the airflow at the edge is; the smaller the cloth index is, the stronger the central airflow is; and adjusting the upper regulating agent according to the distribution index to control the distribution of the gas flow. Only if the distribution index is ensured to be in a certain range and the gas flow is reasonably distributed, the utilization rate of the gas can be improved.
Referring to fig. 10, a structural block diagram of a first computing module in the system for characterizing a charge level shape of a blast furnace according to the embodiment of the present invention is shown; the method comprises the following steps:
the chute cross section calculating unit 21 is used for calculating the area of the furnace burden passing through the chute cross section in unit time according to the material flow, the initial speed of the furnace burden reaching the chute and the density of the furnace burden;
the material flow width and chute tilting distance calculating unit 22 is used for solving an angle alpha corresponding to the occupied area of the material flow in the chute according to the area of the furnace charge passing through the cross section of the chute in unit time, and further solving the material flow width and correcting the chute tilting distance;
the chute speed calculating unit 23 is used for calculating the speed of the furnace burden reaching the tail end of the chute according to the length of the chute, the angle of the chute, the corrected tilting distance of the chute and the width of the material flow;
and the furnace burden horizontal coordinate calculating unit 24 is used for calculating the horizontal coordinate of the position of the falling point of the furnace burden according to the speed of the furnace burden reaching the tail end of the chute, the material flow width, the height of the burden line and the gas pressure.
Referring to fig. 11, a structural block diagram of a second computing module in the system for characterizing a charge level shape of a blast furnace according to the embodiment of the present invention is shown; the method comprises the following steps:
the material distribution element dividing unit 31 is used for dividing the radius of the furnace throat into m equal parts to form material distribution elements and dividing the material batch into n material distribution elements;
a charge level shape construction unit 32, configured to construct a basic charge level function, and form a corresponding charge level shape at each shift;
a final charge level shape generating unit 33, configured to fill a charge level shape from the distribution unit according to the number of turns of distribution, switch to the next gear after the specified number of turns is filled, and add the charge level shapes of all gears until the charge is distributed in the furnace, so as to generate a final charge level shape;
a charge level characteristic parameter calculating unit 34 for extracting charge level characteristic parameters including the funnel depth H according to the final charge level shapefFunnel slope thetasWidth of edge WeWidth W of the platformpAnd center range material Wm。
Referring to fig. 12, a structural diagram of a charge level characterization module in the system for characterizing a charge level shape of a blast furnace according to the embodiment of the present invention is shown; the method comprises the following steps:
an edge distribution index calculation unit 41, configured to calculate an ore and coke edge distribution index according to the edge width, the burden density, and the distribution matrix;
the platform material distribution index calculation unit 42 is used for calculating the material distribution indexes of the ore and coke platforms according to the platform width, the burden density and the material distribution matrix;
a central distribution index calculation unit 43 for calculating central distribution indexes of the ore and coke according to the central range, the burden density and the distribution matrix;
and the comprehensive distribution index calculating unit 44 is used for calculating a comprehensive distribution index according to the burden density and the distribution matrix.
In the above embodiments, the characterization system of the blast furnace burden surface shape and the characterization method of the blast furnace burden surface shape are in a one-to-one correspondence, and therefore, the corresponding technical details and technical effects are not repeated.
Referring to fig. 13, an electronic device according to the present invention includes:
one or more processors 61;
a memory 62; and
one or more programs, wherein the one or more programs are stored in the memory 62 and configured to be executed by the one or more processors 61 to execute the instructions, the execution of which by the one or more processors causes the electronic device to perform the method of characterizing blast furnace burden surface shape as described above.
The processor 61 is operatively coupled to memory and/or non-volatile storage. More specifically, the processor 61 may execute instructions stored in the memory and/or non-volatile storage device to perform operations in the computing device, such as generating and/or transmitting image data to an electronic display. As such, the processor may include one or more general purpose microprocessors, one or more application specific processors (ASICs), one or more field programmable logic arrays (FPGAs), or any combination thereof.
Suitable for use in electronic devices, such as but not limited to notebook computers, tablet computers, mobile phones, smart phones, media players, Personal Digital Assistants (PDAs), navigators, smart televisions, smart watches, digital cameras, and the like, as well as combinations of two or more thereof, in practical embodiments. It should be understood that the electronic device described in the embodiments of the present application is only one example of an application, and that components of the device may have more or fewer components than shown, or a different configuration of components. The various components of the depicted figures may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits. In the specific embodiment of the present application, the electronic device will be described as a smart phone.
In another embodiment of the present application, a computer-readable storage medium storing at least one program which, when invoked, performs a method of characterizing a shape of a charge level of a blast furnace is also disclosed. The characterization method refers to fig. 1 and the related description related to fig. 1, which are not repeated herein.
It should be noted that, through the above description of the embodiments, those skilled in the art can clearly understand that part or all of the present application can be implemented by software and combined with necessary general hardware platform.
With this understanding in mind, the technical solutions of the present application and/or portions thereof that contribute to the prior art may be embodied in the form of a software product that may include one or more machine-readable media having stored thereon machine-executable instructions that, when executed by one or more machines such as a computer, network of computers, or other electronic devices, may cause the one or more machines to perform operations in accordance with embodiments of the present application. For example, each step in the robot control method is executed. The machine-readable medium may include, but is not limited to, floppy diskettes, optical disks, CD-ROMs (compact disc-read only memories), magneto-optical disks, ROMs (read only memories), RAMs (random access memories), EPROMs (erasable programmable read only memories), EEPROMs (electrically erasable programmable read only memories), magnetic or optical cards, flash memory, or other type of media/machine-readable medium suitable for storing machine-executable instructions. Wherein the storage medium may be located in the robot or in a third party server, such as a server providing an application mall. The specific application mall is not limited, such as the millet application mall, the Huawei application mall, and the apple application mall.
The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
In conclusion, the invention provides the charge level shape representation reference for the operator in the upper regulation process by accurately representing the charge level shape and the distribution matrix information, thereby being beneficial to accurately and timely adjusting the distribution system, improving the gas flow distribution and realizing the stable and smooth production of the blast furnace. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (12)
1. A method of characterizing blast furnace burden surface shape, comprising:
acquiring basic data, wherein the basic data comprises equipment parameters, furnace burden characteristic parameters and a charging matrix of the bell-less furnace top;
simulating a material flow track to calculate the material flow width and the position coordinates of a furnace charge drop point;
calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape; dividing the radius of the furnace throat into m equal parts to form material distribution elements, and dividing a material batch into n material distribution elements; constructing a basic charge level function by adopting three-section straight curve type description, and forming a corresponding charge level shape under each gear;
in the formula, R is the radius of a charge level function curve segment, beta is a natural stacking angle of a furnace charge, delta beta is an inner diagonal angle and an outer diagonal angle, theta is a chute angle, x and y are respectively a horizontal coordinate and a vertical coordinate under a current gear, and psi is a charge level shape function under the current gear;
filling the material surface shape by the material distribution unit according to the number of turns of material distribution by using a finite element method, switching to the next gear after the specified number of turns is filled, and superposing the material surface shapes of all gears until the material distribution of the furnace is finished to generate the final material surface shape;
extracting characteristic parameters of the charge level, including the depth of the funnel, the gradient of the funnel, the edge width, the width of the platform and the material in the central range, according to the shape of the final charge level;
and calculating a distribution index representing the shape of the charge level and the distribution matrix according to the charge level characteristic parameters.
2. The method of characterizing blast furnace burden surface shape of claim 1, further comprising: and adjusting the upper regulating agent by utilizing the distribution index to control the distribution of the gas flow, wherein the distribution index comprises a comprehensive distribution index, an edge distribution index, a platform distribution index and a central distribution index.
3. The method of characterizing blast furnace burden surface shape of claim 1, wherein said step of simulating a burden flow trajectory to calculate coordinates of burden flow width and burden drop point location comprises:
calculating the area of the furnace burden passing through the cross section of the chute in unit time according to the material flow, the initial speed of the furnace burden reaching the chute and the density of the furnace burden;
according to the area of the furnace burden passing through the cross section of the chute in unit time, solving the angle corresponding to the area occupied by the furnace burden material flow in the chute, and further solving the material flow width and correcting the chute tilting distance;
wherein alpha is the angle corresponding to the occupied area of the burden material flow in the chute, r is the radius of the chute, WfIs the width of the stream;
calculating the speed of the furnace burden reaching the tail end of the chute according to the length of the chute, the angle of the chute, the corrected tilting distance of the chute and the width of the material flow;
calculating the horizontal coordinate of the falling point position of the furnace burden in the furnace according to the speed of the furnace burden reaching the tail end of the chute, the material flow width, the height of the burden line and the gas pressure;
wherein lrIs the length of the chute, /)tIs the chute tilting distance, theta is the chute angle, omegarIs the chute rotation speed, v1As the velocity of the end of the chute, m0H is the height of the stock line, PgIs the gas pressure, LfIs the abscissa of the position of the falling point in the furnace.
4. The method for characterizing blast furnace burden surface shape as claimed in claim 1, wherein said step of calculating a burden distribution index characterizing burden surface shape and distribution matrix according to said burden surface characteristic parameters comprises:
calculating the distribution index of the ore and coke edges according to the edge width, the burden density and the distribution matrix;
calculating the distribution index of the ore and coke platforms according to the platform width, the burden density and the distribution matrix;
calculating the distribution index of the center of the ore and coke according to the center range, the density of the furnace burden and the distribution matrix;
calculating a comprehensive distribution index according to the density of the furnace burden and the distribution matrix;
wherein B is a comprehensive cloth index, TO，TCRespectively ore batch weight, coke batch weight, NOi，NCiI grade ore and coke turns, LiIs the i-grade charge material falling point position, rhoO，ρCThe bulk densities of the ore and the coke are respectively.
5. The method for characterizing the shape of the blast furnace burden surface according to claim 2, wherein the burden distribution index characterizes the ore-coke ratio and the airflow distribution of each point of the burden in the radius direction of the throat part, and the larger the burden distribution index is, the stronger the airflow at the edge is; the smaller the cloth index is, the stronger the central airflow is; and adjusting the upper regulating agent according to the distribution index to control the distribution of the gas flow.
6. A system for characterizing blast furnace burden surface shape, comprising:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring basic data, and the basic data comprises equipment parameters of a bell-less furnace top, furnace burden characteristic parameters and a charging matrix;
the first calculation module is used for simulating a material flow track to calculate the material flow width and the coordinates of the furnace burden drop point;
the second calculation module is used for calculating the charge level shape formed by the furnace burden falling from each chute inclination angle by using a finite element method, and extracting charge level characteristic parameters according to the charge level shape; the second computing module further comprises:
the material distribution element dividing unit is used for dividing the radius of the furnace throat into m equal parts to form material distribution elements and dividing the material batch into n material distribution elements;
the charge level shape construction unit is used for describing and constructing a basic charge level function by adopting a three-section straight curve type, and forming a corresponding charge level shape under each gear;
in the formula, R is the radius of a charge level function curve segment, beta is a natural stacking angle of a furnace charge, delta beta is an inner diagonal angle and an outer diagonal angle, theta is a chute angle, x and y are respectively a horizontal coordinate and a vertical coordinate under a current gear, and psi is a charge level shape function under the current gear;
the final charge level shape generating unit is used for filling the charge level shape by the distributing unit according to the number of turns of distribution by using a finite element method, switching to the next gear after the specified number of turns is filled, and superposing the charge level shapes of all gears until the furnace charge is distributed, so as to generate the final charge level shape;
the charge level characteristic parameter calculating unit is used for extracting charge level characteristic parameters including funnel depth, funnel gradient, edge width, platform width and central range material according to the final charge level shape;
and the charge level characterization module is used for calculating a material distribution index for characterizing the charge level shape and the material distribution matrix according to the charge level characteristic parameters.
7. The system for characterizing blast furnace burden surface shape of claim 6, further comprising: and the upper distribution control module is used for adjusting the upper distribution by utilizing the distribution index to control the distribution of the gas flow, and the distribution index comprises a comprehensive distribution index, an edge distribution index, a platform distribution index and a central distribution index.
8. The system of claim 6, wherein the first computing module comprises:
the chute cross section calculating unit is used for calculating the area of the furnace burden passing through the chute cross section in unit time according to the material flow, the initial speed of the furnace burden reaching the chute and the density of the furnace burden;
the material flow width and chute tilting distance calculating unit is used for solving the angle corresponding to the occupied area of the material flow in the chute according to the area of the furnace charge passing through the cross section of the chute in unit time, and further solving the material flow width and correcting the chute tilting distance;
wherein alpha is the angle corresponding to the occupied area of the burden material flow in the chute, r is the radius of the chute, WfIs the width of the stream;
the chute speed calculating unit is used for calculating the speed of the furnace burden reaching the tail end of the chute according to the length of the chute, the angle of the chute, the corrected tilting distance of the chute and the width of the material flow;
the furnace burden horizontal coordinate calculating unit is used for calculating the horizontal coordinate of the position of a dropping point of the furnace burden in the furnace according to the speed of the furnace burden reaching the tail end of the chute, the material flow width, the height of the burden line and the gas pressure;
wherein lrIs the length of the chute, /)tIs the chute tilting distance, theta is the chute angle, omegarIs the chute rotation speed, v1As the velocity of the end of the chute, m0H is the height of the stock line, PgIs the gas pressure, LfIs the abscissa of the position of the falling point in the furnace.
9. The system of claim 6, wherein the charge level characterization module comprises:
the edge distribution index calculation unit is used for calculating the ore and coke edge distribution index according to the edge width, the burden density and the distribution matrix;
the platform material distribution index calculation unit is used for calculating the material distribution indexes of the ore and coke platforms according to the platform width, the burden density and the material distribution matrix;
the central distribution index calculating unit is used for calculating central distribution indexes of the ore and coke according to the central range, the burden density and the distribution matrix;
the comprehensive distribution index calculating unit is used for calculating a comprehensive distribution index according to the density of the furnace burden and the distribution matrix;
wherein B is a comprehensive cloth index, TO，TCRespectively ore batch weight, coke batch weight, NOi，NCiI grade ore and coke turns, LiIs the i-grade charge material falling point position, rhoO，ρCThe bulk densities of the ore and the coke are respectively.
10. The system for characterizing the shape of the blast furnace burden surface according to claim 7, wherein the burden distribution index characterizes the ore-coke ratio and the airflow distribution of the burden at each point in the radius direction of the throat part, and the larger the burden distribution index is, the stronger the airflow at the edge is; the smaller the cloth index is, the stronger the central airflow is; and adjusting the upper regulating agent according to the distribution index to control the distribution of the gas flow.
11. An electronic device, characterized in that the device comprises:
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors to cause the electronic device to perform the method of characterizing blast furnace burden surface shape of any of claims 1-5.
12. A storage medium storing at least one program, wherein the at least one program when invoked performs the method of characterizing blast furnace burden surface shape of any of claims 1-5.
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| CN112308296B (en) * | 2020-10-12 | 2023-04-18 | 中冶赛迪信息技术(重庆)有限公司 | Method and system for predicting distribution of furnace burden in blast furnace |
| CN112853014A (en) * | 2021-01-06 | 2021-05-28 | 鞍钢股份有限公司 | Method for adjusting shape of material distributing surface of blast furnace |
| CN113137992B (en) * | 2021-03-25 | 2022-02-18 | 中南大学 | High-temperature fluid mass flow online detection method, device and system |
| CN113699291A (en) * | 2021-07-19 | 2021-11-26 | 上海梅山钢铁股份有限公司 | Method for calculating blast furnace material distribution drop point based on laser measurement data |
| CN114921598B (en) * | 2022-04-27 | 2023-05-09 | 中南大学 | Blast furnace top burden motion trail modeling method and system |
| CN115109881A (en) * | 2022-08-10 | 2022-09-27 | 广东韶钢松山股份有限公司 | Method and device for distributing materials on furnace top |
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