Blast furnace tuyere air volume distribution method and device, electronic equipment and storage medium

Abstract

The invention provides a blast furnace tuyere air volume distribution method and device, electronic equipment and a storage medium. The method comprises the steps that blast furnace operation data are obtained, any tuyere serves as a first tuyere, the initial air volume is obtained based on the total operation air volume and the tuyere number, and the initial air volume serves as the tuyere air volume of the first tuyere; obtaining a header pipe inlet pressure of the first tuyere according to the tuyere air volume of the first tuyere, the tuyere rotation area back pressure of the first tuyere and a preset mapping relation; taking the initial air volume as the air volume of the other air ports, traversing and calculating the main pipe inlet pressure of the other air ports, and adjusting the air volume of the other air ports based on the main pipe inlet pressure of the other air ports and the main pipe inlet pressure of the first air port, so that the difference between the main pipe inlet pressure of the other air ports and the main pipe inlet pressure of the first air port is smaller than a preset pressure threshold value; and the adjusted tuyere air volume of each other tuyere is used as the distribution air volume of each other tuyere, so that the technical problem of low calculation precision of tuyere air volume distribution at present is solved.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace smelting, and in particular to a method, device, electronic equipment and storage medium for distributing air volume at a blast furnace tuyere. Background Art

[0002] The large-scale blast furnace has a large diameter and many tuyere, which leads to uneven airflow in the circumferential direction of the furnace and inactivity of the furnace during operation. In order to maintain the suitability and uniformity of gas volume, make the furnace work evenly in the circumference, and keep the entire furnace active, the general operating experience is to evenly distribute the air volume by adjusting the tuyere length and tuyere area. For example, if the total air volume of the blast furnace remains unchanged, increasing the tuyere length can introduce hot air into the center of the blast furnace and improve the activity of the center of the furnace; reducing the tuyere area can increase the wind speed of the tuyere, thereby increasing the kinetic energy of the blast, which is conducive to blowing through the center of the furnace.

[0003] The air volume distribution of each tuyere is affected by the combined effects of parameters such as the diameter and length of the tuyere sleeve, the depth and back pressure of the tuyere whirlpool zone, the coal injection volume, and the oxygen enrichment rate. The existing air volume distribution models on the market generally have problems such as fewer coupling parameters, resulting in low calculation accuracy, and certain differences from actual production. For example, in an online model for calculating the air volume of a tuyere, it is assumed that the pressure difference between its inlet and outlet is consistent, and the air volume of the tuyere is only affected by the changes in the size and area of ​​the tuyere, which results in the air volume distribution of each tuyere not being affected by the forward environment in the furnace. Therefore, the calculation accuracy of the air volume distribution of the tuyere in the relevant technology is not high, and the air volume distribution calculation model is not of high value in guiding production. Summary of the invention

[0004] In view of the shortcomings of the related technologies mentioned above, the present application provides a blast furnace tuyere air volume distribution method, device, electronic equipment and storage medium to solve the current technical problem of low calculation accuracy of tuyere air volume distribution.

[0005] The present application provides a method for allocating air volume at blast furnace tuyere, the method comprising: acquiring blast furnace operation data, the blast furnace operation data comprising the total operating air volume, the number of tuyere and the back pressure of the tuyere raceway of each tuyere, taking any tuyere as the first tuyere, and obtaining the initial air volume based on the total operating air volume and the number of tuyere, and taking the initial air volume as the tuyere air volume of the first tuyere; obtaining the main pipe inlet pressure of the first tuyere according to the tuyere air volume of the first tuyere, the back pressure of the tuyere raceway of the first tuyere and a preset mapping relationship; taking the initial air volume as the tuyere air volume of other tuyere, traversing and calculating the main pipe inlet pressure of the other tuyere, and adjusting the tuyere air volume of the other tuyere based on the main pipe inlet pressure of the other tuyere and the main pipe inlet pressure of the first tuyere, so that the difference between the main pipe inlet pressure of the other tuyere and the first tuyere is less than the preset pressure threshold, and taking the adjusted tuyere air volume of each of the other tuyere as the allocated air volume of each of the other tuyere.

[0006] In one embodiment of the present application, after the adjusted air volume of each of the other air outlets is used as the allocated air volume of each of the other air outlets, the method further includes: obtaining the allocated total air volume based on the allocated air volume of each of the other air outlets and the initial air volume of the first air outlet; if the difference between the allocated total air volume and the operating total air volume is greater than a preset air volume threshold, adjusting the initial air volume based on the ratio of the operating total air volume to the allocated total air volume to obtain an adjusted initial air volume; using the adjusted initial air volume as the air volume of the first air outlet, recalculating the adjusted main pipe inlet pressure of the first air outlet, and using the adjusted initial air volume as the air volume of the first air outlet The air volume of the other air outlets is calculated, and the adjusted main pipe inlet pressure of the other air outlets is recalculated; the air volume of the other air outlets is adjusted based on the adjusted main pipe inlet pressure of the other air outlets and the adjusted main pipe inlet pressure of the first air outlet to obtain the adjusted distributed air volume of each other air outlet; the adjusted distributed total air volume is obtained according to the adjusted distributed air volume of each other air outlet and the adjusted initial air volume of the first air outlet; if the difference between the adjusted distributed total air volume and the operating total air volume is greater than the preset air volume threshold, repeat the above steps until the difference between the adjusted distributed total air volume and the operating total air volume is less than or equal to the preset air volume threshold.

[0007] In one embodiment of the present application, the main pipe inlet pressure of the first air outlet is obtained according to the air volume of the first air outlet, the back pressure of the air outlet vortex zone of the first air outlet and a preset mapping relationship, including: dividing the first air outlet into a front section and a rear section, the front section is the hot air main pipe inlet section to the front direct injection section of the air outlet small sleeve, and the rear section is the front direct injection section of the air outlet small sleeve to the air outlet vortex section; according to the air volume of the first air outlet, the back pressure of the air outlet vortex zone of the first air outlet and a preset first mapping relationship, the rear section inlet pressure and air outlet density of the first air outlet are obtained, and the air outlet of the first air outlet is The density is the density of the cross-section of the rear section inlet of the first air outlet; the characteristic flow velocity of the first air outlet is obtained according to the air outlet density and the duct flow velocity of the first air outlet, the duct flow velocity of the first air outlet is obtained based on the air outlet air volume of the first air outlet, and the front section resistance loss coefficient of the first air outlet is obtained based on the characteristic flow velocity of the first air outlet and the preset second mapping relationship; the front section pressure reduction of the first air outlet is obtained based on the front section resistance loss coefficient and the air outlet density of the first air outlet, and the sum of the rear section inlet pressure and the front section pressure reduction of the first air outlet is used as the total pipe inlet pressure of the first air outlet.

[0008] In one embodiment of the present application, the initial air volume is used as the air volume of other air outlets, the main pipe inlet pressure of the other air outlets is traversed and calculated, and the air volume of the other air outlets is adjusted based on the main pipe inlet pressure of the other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of the other air outlets and the first air outlet is less than a preset pressure threshold, and the adjusted air volume of each other air outlet is used as the allocated air volume of each other air outlet, including: traversing all other air outlets, and taking the other air outlets as the second air outlet in turn; dividing the second air outlet into a front section and a rear section, the front section is a section from the hot air main inlet to the front direct injection section of the air outlet small sleeve, and the rear section is a section from the front of the air outlet small sleeve Direct injection section to tuyere swirl section; obtain the rear section inlet pressure and tuyere density of the second tuyere according to the tuyere air volume of the second tuyere, the tuyere swirl zone back pressure of the second tuyere and a preset first mapping relationship; obtain the characteristic flow velocity of the second tuyere according to the tuyere density and the duct flow velocity of the second tuyere, the duct flow velocity of the second tuyere is obtained based on the tuyere air volume of the second tuyere, obtain the front section resistance loss coefficient of the second tuyere based on the characteristic flow velocity of the second tuyere and a preset second mapping relationship; obtain the front section pressure reduction of the second tuyere based on the front section resistance loss coefficient and the tuyere density of the second tuyere, and take the sum of the rear section inlet pressure and the front section pressure reduction of the second tuyere as the total pipe inlet pressure of the second tuyere. If the difference between the main pipe inlet pressure of the second air outlet and the main pipe inlet pressure of the first air outlet is greater than the preset pressure threshold, the air volume of the second air outlet is adjusted based on the ratio of the main pipe inlet pressure of the first air outlet to the main pipe inlet pressure of the second air outlet, and the adjusted air volume of the second air outlet is used as the distributed air volume of the second air outlet to complete the air volume distribution of the second air outlet; the next other air outlet is used as the second air outlet for the air volume distribution until the air volume distribution is completed for all the other air outlets to obtain the distributed air volume corresponding to all the other air outlets.

[0009] In one embodiment of the present application, obtaining the front-end pressure reduction of the first tuyere based on the front-end resistance loss coefficient and tuyere density of the first tuyere includes:

[0010]

[0011] Among them, ΔP i,12 is the pressure reduction at the front section of the first air outlet, f i,12 is the front section resistance coefficient of the first tuyere, ρ i,2 is the tuyere density of the first tuyere, w i,2 is the air duct flow rate of the first air outlet.

[0012] In one embodiment of the present application, obtaining the initial air volume based on the total operating air volume and the number of air outlets includes: obtaining the blockage status of each air outlet, taking the air outlets with a blocked status as abnormal air outlets, and counting the number of abnormal air outlets; taking the difference between the number of air outlets and the number of abnormal air outlets as the number of normal air outlets; and obtaining the initial air volume based on the total operating air volume and the number of normal air outlets.

[0013] In one embodiment of the present application, before obtaining the blast furnace operation data, the process includes: obtaining the blast furnace top pressure and bed pressure difference of the blast furnace through a pressure sensor in the blast furnace; and obtaining the tuyere swirl zone back pressure based on the sum of the blast furnace top pressure and the bed pressure difference.

[0014] The embodiment of the present application also provides a blast furnace tuyere air volume distribution device, characterized in that the blast furnace tuyere air volume distribution device comprises: a data input module for obtaining blast furnace operation data, the blast furnace operation data including the total operation air volume, the number of tuyere and the tuyere raceway back pressure of each tuyere, an air volume calculation module for taking any tuyere as the first tuyere, and obtaining the initial air volume based on the total operation air volume and the number of tuyere, and taking the initial air volume as the tuyere air volume of the first tuyere; a pressure calculation module for calculating the pressure of the tuyere according to the tuyere air volume of the first tuyere, the number of tuyere and the back pressure of the tuyere raceway of each tuyere; The main pipe inlet pressure of the first air outlet is obtained by the back pressure of the air outlet rotation area of ​​the air outlet and the preset mapping relationship; an air volume distribution module is used to take the initial air volume as the air outlet air volume of other air outlets, traverse and calculate the main pipe inlet pressure of the other air outlets, and adjust the air outlet air volume of the other air outlets based on the main pipe inlet pressure of the other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of the other air outlet and the first air outlet is less than a preset pressure threshold, and the adjusted air outlet air volume of each of the other air outlets is used as the distributed air volume of each of the other air outlets.

[0015] An embodiment of the present application also provides an electronic device, which includes one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device implements the blast furnace tuyere air volume distribution method as described in any of the above embodiments.

[0016] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor of a computer, the computer is enabled to execute a blast furnace tuyere air volume distribution method as described in any of the above embodiments.

[0017] Beneficial effects of the present application: The embodiments of the present application provide a method, device, electronic device and storage medium for distributing air volume at blast furnace tuyere. The method takes any tuyere as the first tuyere by acquiring blast furnace operation data, and obtains the initial air volume based on the total operating air volume and the number of tuyere, and takes the initial air volume as the tuyere air volume of the first tuyere; obtains the main pipe inlet pressure of the first tuyere according to the tuyere air volume of the first tuyere, the tuyere whirlpool area back pressure of the first tuyere and a preset mapping relationship; takes the initial air volume as the tuyere air volume of other tuyere, traverses and calculates the main pipe inlet pressure of other tuyere, and adjusts the tuyere air volume of other tuyere based on the main pipe inlet pressure of other tuyere and the main pipe inlet pressure of the first tuyere, so that the difference between the main pipe inlet pressure of other tuyere and the first tuyere is less than the preset pressure threshold, and takes the adjusted tuyere air volume of each other tuyere as the distributed air volume of each other tuyere. The method distributes the tuyere air volume by coupling the tuyere whirlpool area back pressure, and can comprehensively consider the forward movement of each tuyere corresponding to the bed layer in the furnace, thereby improving the accuracy of air volume distribution.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an implementation environment of a blast furnace tuyere air volume distribution method shown in an exemplary embodiment of the present application;

[0020] Figure 2 It is a flow chart of iterative calculation of blast furnace tuyere air volume distribution shown in an exemplary embodiment of the present application;

[0021] Figure 3 It is a flow chart of a method for distributing air volume at a blast furnace tuyere shown in an exemplary embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of a calculation of a physical model of a mapping table of the relationship between the flow velocity of a blast furnace air duct and the comprehensive resistance loss coefficient, shown in an exemplary embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of a simulation computer model showing the relationship between flow rate and back pressure and inlet cross-sectional pressure and density in an exemplary embodiment of the present application.

[0024] Figure 6 It is a schematic diagram of segmented modeling of a blast furnace hot air duct and tuyere shown in an exemplary embodiment of the present application;

[0025] Figure 7 is a block diagram of a blast furnace tuyere air volume distribution device shown in an exemplary embodiment of the present application;

[0026] Figure 8It is a structural schematic diagram of an electronic device shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0029] It should be noted that in this application, "first", "second", etc. are only used to distinguish similar objects, and are not used to limit the order or precedence of similar objects. The variations of "including", "having", etc. described above indicate that the scope covered by the subject of the word is not exclusive except for the examples shown by the word.

[0030] It is understood that the various numbers, step numbers, and other reference numerals recorded in this application are distinguished for the convenience of description and are not intended to limit the scope of this application. The size of the reference numerals in this application does not mean the order of execution. The execution order of each process should be determined by its function and internal logic.

[0031] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0032] The embodiments of the present application respectively propose a blast furnace tuyere air volume distribution method, a blast furnace tuyere air volume distribution device, an electronic device, a computer-readable storage medium and a computer program product, which will be described in detail below.

[0033] See also Figure 1 , Figure 1 It is a schematic diagram of an implementation environment of a blast furnace tuyere air volume distribution method shown as an exemplary embodiment of the present application.

[0034] like Figure 1 As shown, the implementation environment may include a tuyere air volume distribution sensor 101 and a computer device 102. The tuyere air volume distribution sensor 101 is used to obtain the current total air supply volume, the number of tuyere, the tuyere small sleeve diameter and tuyere small sleeve length of each tuyere, the tuyere whirlpool depth and back pressure of each tuyere, the blockage of each tuyere, etc. when the blast furnace is running; the computer device 102 may be at least one of a microcomputer, an embedded computer, a neural network computer, etc.

[0035] In one embodiment of the present application, in the computer device 102, according to the dynamically acquired blast furnace operation data, including the total air supply volume, the number of tuyere, the tuyere small sleeve diameter and the tuyere small sleeve length of each tuyere, the tuyere swirl zone depth and back pressure of each tuyere, the blockage condition of each tuyere, etc.; according to a preset characteristic flow rate and comprehensive resistance loss coefficient relationship mapping table (second mapping relationship); according to a preset tuyere air volume and back pressure and inlet cross-sectional pressure and density mapping table (first mapping relationship); select one tuyere as the first tuyere, and calculate the front-end pressure reduction and rear-end pressure reduction of the first tuyere based on the above-mentioned first mapping relationship and second mapping relationship. The inlet pressure of each section is obtained to obtain the main pipe inlet pressure of the first air outlet; loop through each other air outlet, take the initial air volume as the air outlet air volume of other air outlets, calculate the main pipe inlet pressure of each other air outlet, correct the distributed air volume of each other air outlet so that the difference between the main pipe inlet pressure of each other air outlet and the main pipe inlet pressure of the first air outlet is less than the preset pressure threshold; calculate the sum of the air outlet volumes of each air outlet, update the main pipe inlet pressure of the first air outlet by adjusting the initial air volume, and recalculate the distributed air volume of each other air outlet so that the difference between the distributed total air volume and the total operating air volume collected by the air outlet air volume distribution sensor 101 is less than the preset air volume threshold.

[0036] Based on a pre-established relationship mapping table, the computer device 102 can quickly calculate the air volume of each tuyere according to the process and structural parameters obtained in real time by the tuyere air volume distribution sensor 101, which greatly reduces the calculation amount and storage space of the model and improves the timeliness of the calculation; by coupling the tuyere air volume distribution sensor 101 to obtain the depth of the tuyere swirl zone and the back pressure in the furnace, the forward movement of the bed layer in the furnace corresponding to each tuyere can be comprehensively considered to improve the accuracy of the calculation.

[0037] See also Figure 2 , Figure 2 is a flowchart of iterative calculation of blast furnace tuyere air volume distribution shown in an exemplary embodiment of the present application, such as Figure 2 As shown, the iterative calculation process of blast furnace tuyere air volume distribution includes at least steps S210 to S2120, which are described in detail as follows:

[0038] Step S210, obtaining data during the operation of the blast furnace, including at least the total air supply volume Qm总 (i.e. the total operating air volume), the number of air outlets n, the air outlet pipe diameter D, the air outlet length L, the air outlet swirl zone depth Ld and the air outlet swirl zone back pressure P5, as well as the blockage status of each air outlet, etc.

[0039] Step S220, preliminarily select a single air outlet i from each air outlet and calculate the air volume Q i,m (Air outlet i is the first air outlet, air volume Q i,m is the initial air volume), air volume Q i,m According to the total air supply volume Q m总 Determined by the usage of the tuyere.

[0040] In one embodiment of the present application, Q i,m =Q m Total / (total number of air outlets - number of blocked air outlets).

[0041] Step S230, the density of the inlet section of the rear section of the tuyere i (i.e., the tuyere density ρ) is calculated based on the real-time operation data of the pre-selected tuyere i and the relationship mapping table of the flow rate and back pressure from the front direct injection section of the tuyere small sleeve to the tuyere swirl section and the density of the inlet section pressure (i.e., the preset first mapping relationship). i,2 ) and the rear inlet pressure P of tuyere i i,2 .

[0042] Step S240, obtain the characteristic flow rate of tuyere i according to the flow rate of the direct injection section from the hot air main pipe to the tuyere small sleeve, and then calculate the front section pressure reduction ΔP of tuyere i according to the mapping relationship between the characteristic flow rate and the resistance loss coefficient (i.e. the preset second mapping relationship) i,12 .

[0043] Step S250: reduce the pressure of the front section of the tuyere i by ΔP i,12 and the rear inlet pressure P i,2 Add together to get the hot air main inlet pressure P at tuyere i i,1 .

[0044] Step S260, loop through each other air outlet j (j=1, 2, ..., n), assuming that the air volume of each other air outlet j is Q j,m , Q j,m Can be used with Q i,m The values ​​are consistent.

[0045] Step S270, the density of the inlet section of the rear section of tuyere j (i.e., the tuyere density ρ) is calculated based on the real-time operation data of tuyere j and the relationship mapping table of the flow rate and back pressure from the front direct injection section of the tuyere small sleeve to the tuyere swirl section and the density of the inlet section pressure (i.e., the preset first mapping relationship). j,2 ) and the rear inlet pressure P of the tuyere j j,2 .

[0046] Step S280, obtain the characteristic flow rate of tuyere j according to the flow rate of the direct injection section before the hot air main pipe to the tuyere small sleeve, and then calculate the front section pressure reduction ΔP of tuyere j according to the mapping relationship between the characteristic flow rate and the resistance loss coefficient (i.e. the preset second mapping relationship) j,12 .

[0047] Step S290, reduce the pressure of the front section of the tuyere j by ΔP j,12 and the rear inlet pressure P j,2 Add together to get the hot air main inlet pressure P at tuyere j j,1 .

[0048] Step S2100, determine the main pipe inlet pressure P of tuyere i i,1 The main pipe inlet pressure P at tuyere j j,1 Is the difference less than the preset pressure threshold? If so, proceed to step S2110; if not, readjust the air volume of air outlet j.

[0049] In one embodiment of the present application, re-adjusting the air volume of the air outlet j includes Q j ' ,m , Where Q j ' ,m is the air volume of tuyere j after adjustment.

[0050] Step S2110, calculate the total air volume Q′ of each air outlet after adjustment m总 , that is, add up the adjusted air volume of each air outlet to get the total distributed air volume Q′ m总 .

[0051] Step S2120, determine the total air volume Q' m总 Total air volume Q m总 Is the difference less than the preset air volume threshold? If so, the air volume distribution is completed, and the air volume of each air outlet at this time is used as the final distributed air volume of each air outlet. If not, Q i,m After the adjustment, steps S220 to S2120 are repeated.

[0052] In one embodiment of the present application, Q i,m Adjustments include Where Q i ' ,m is the adjusted initial air volume.

[0053] See also Figure 3 , Figure 3 is a flow chart of a method for distributing blast furnace tuyere air volume according to an exemplary embodiment of the present application. The method can be applied to Figure 1The implementation environment shown is as follows. The method may also be applicable to other exemplary implementation environments and be specifically executed by devices in other implementation environments. This embodiment does not limit the implementation environment to which the method is applicable.

[0054] like Figure 3 As shown, in an exemplary embodiment, the blast furnace tuyere air volume distribution method includes at least steps S310 to S340, which are described in detail as follows:

[0055] Step S310, obtaining blast furnace operation data, the blast furnace operation data including the total operating air volume, the number of tuyere and the back pressure of the tuyere rotation zone of each tuyere.

[0056] In one embodiment of the present application, the blast furnace operation data also includes: the total operating air volume Q m总 , the number of tuyere n, the tuyere diameter D, the tuyere length L, the tuyere raceway depth Ld and the tuyere raceway back pressure P5, as well as the blockage status of each tuyere, etc.

[0057] In one embodiment of the present application, before obtaining the blast furnace operation data, it also includes a mapping table of the relationship between characteristic flow velocity and resistance loss coefficient (i.e., a preset second mapping relationship); and establishes a mapping table of the relationship between the tuyere air volume and the tuyere swirl zone back pressure and the rear section inlet section pressure and density (i.e., a preset first mapping relationship).

[0058] In one embodiment of the present application, Figure 4 It is a schematic diagram of a calculation of a physical model of a mapping table of the relationship between the flow velocity of a blast furnace air duct and the comprehensive resistance loss coefficient, shown in an exemplary embodiment of the present application; Figure 5 It is a schematic diagram of a simulation computer model of a relationship mapping table of flow rate and back pressure with inlet cross-sectional pressure and density shown in an exemplary embodiment of the present application; Figure 6 It is a schematic diagram of segmented modeling of a blast furnace hot air duct and tuyere shown in an exemplary embodiment of the present application.

[0059] In one embodiment of the present application, according to Figure 6 As shown, the blast furnace hot blast duct and tuyere segmented modeling includes the hot blast main pipe inlet section to the tuyere small sleeve front direct injection section and the tuyere small sleeve front direct injection section to the tuyere swirl section. The hot blast main pipe inlet section to the tuyere small sleeve front direct injection section is taken as the front section, and the tuyere small sleeve front direct injection section to the tuyere swirl section is taken as the rear section. Taking tuyere i as an example, the hot blast main pipe inlet pressure is P1, and the front section pressure reduction is ΔP i,12 The pressure drop in the front section is the pressure change from the inlet pressure of the hot air main pipe to the inlet pressure of the rear section, where the inlet pressure of the rear section is the inlet cross-section pressure of the tuyere sleeve (the inlet of the rear section is the inlet of the tuyere sleeve). The inlet pressure of the rear section is P i,2 , the cross-sectional density of the rear section entrance is ρ i,2 , the air duct velocity at the rear entrance is w i,2The outlet of the rear section is the outlet of the tuyere sleeve, and the cross-sectional density of the outlet of the tuyere sleeve is ρ i,4 The pressure of the outlet section of the tuyere is P i,4 The air duct velocity at the outlet of the small air outlet is w i,4 .P i,5 is the back pressure in the tuyere swirl zone, ΔP i,25 It is the pressure reduction in the rear section (i.e. the pressure change from the direct injection section in front of the tuyere sleeve to the tuyere swirl section).

[0060] In one embodiment of the present application, a calculation model of the whole system of the hot air pipe network is established, such as Figure 4 Take the hot air main inlet section to the tuyere raceway as the numerical simulation calculation domain, fix the tuyere raceway size, tuyere raceway back pressure, tuyere small sleeve diameter and tuyere small sleeve length, and calculate the total flow rate Q at different inlets. m总 Under the condition, each branch pipe has a characteristic flow velocity V from the inlet section of the hot air main pipe to the direct injection section before the tuyere small sleeve. i,2 And the resistance loss factor f i,12 Corresponding relationship. Determine the relationship mapping table of different comprehensive resistance coefficients corresponding to different flow rates from the hot air main pipe to the direct injection section before the tuyere small sleeve. Specifically, according to the pipeline layout diagram of the hot air pipe system of the tuyere of the actual project, establish three-dimensional geometric modeling and mesh division. Use computational fluid dynamics software (such as Fluent) to set boundary conditions and calculate variable working conditions, and obtain the pressure drop, characteristic section density and flow rate of the characteristic cross section from the inlet section of the hot air main pipe to the direct injection section before each tuyere small sleeve under different working conditions (such as changing the total inlet flow rate: 0.5Q, 0.6Q, 0.7Q, 0.8Q, 0.9Q, 1.0Q, 1.1Q, 1.2Q, Q = 90Kg / s). Based on the relationship between resistance and flow rate, the relationship curve between the comprehensive resistance coefficient of each branch pipe and the characteristic flow rate is fitted.

[0061] In one embodiment of the present application, a single tuyere system calculation model is established, such as Figure 5 As shown. The branch pipe is cut off in the middle of the direct injection pipe, and the section from the direct injection section in front of the air outlet sleeve to the air outlet whirlpool area is taken as the numerical simulation calculation domain. Then, when the air outlet diameter and air outlet length of a single air outlet are the same, the flow characteristics of each air outlet are only affected by the inlet flow size and back pressure. Calculate the air volume Q mi , back pressure of tuyere raceway P5), total pressure drop ΔP from the front direct injection section of the tuyere raceway to the tuyere outlet under different structural dimensions (tuyere small casing diameter D, tuyere small casing length L, tuyere raceway depth Ld). i,25 、The cross-sectional density of the inlet of the direct injection section before the tuyere sleeve ρ i,2 and pressure P i,2 、The cross-sectional density of the tuyere sleeve outlet ρ i,4 and pressure P i,4, establish the functional correspondence between different input boundaries and output parameters. Specifically, according to the actual engineering tuyere structure size and tuyere whirlpool depth, establish single tuyere systems of different sizes (such as tuyere diameter variation range DN110, DN115, DN120 three groups, tuyere length variation range 560mm, 580mm, 600mm three groups, tuyere whirlpool depth variation range 1.0m, 1.5m, 2.0m), change the tuyere air volume (single tuyere inlet flow rate: 0.8q, 0.9q, 1.0q, 1.1q, 1.2q) and tuyere whirlpool back pressure (single tuyere The back pressure of the whirlpool zone is: 390000Pa, 398750Pa, 402500Pa, 406250Pa, 410000Pa), and the pressure drop, characteristic section density and flow rate of each characteristic section (such as the inlet section of the tuyere sleeve and the outlet section of the tuyere sleeve) under different structures and different boundary conditions are obtained (a total of 675 working conditions). Based on the Rbf algorithm, the relationship mapping table between the flow characteristic parameters (pressure and density of the rear inlet section and other parameters) of the single tuyere of different structural sizes and the tuyere air volume and the back pressure of the tuyere whirlpool zone is determined. As shown in Table 1, the flow characteristic parameters of each section under different process parameter conditions are shown for a specification of tuyere with a diameter of 120mm, a length of 600mm, and a depth of 1.5m.

[0062] Table 1

[0063]

[0064] In one embodiment of the present application, before obtaining the blast furnace operation data, it includes: obtaining the blast furnace top pressure and bed pressure difference of the blast furnace through the pressure sensor in the blast furnace; and obtaining the tuyere swirl zone back pressure based on the sum of the blast furnace top pressure and the bed pressure difference.

[0065] Step S320, taking any one air outlet as the first air outlet, and obtaining an initial air volume based on the total operating air volume and the number of air outlets, and taking the initial air volume as the air outlet air volume of the first air outlet.

[0066] In one embodiment of the present application, obtaining the initial air volume based on the total operating air volume and the number of air outlets includes: obtaining the blockage status of each air outlet, treating the air outlets with a blockage status as abnormal air outlets, and counting the number of abnormal air outlets; treating the difference between the number of air outlets and the number of abnormal air outlets as the number of normal air outlets; and obtaining the initial air volume based on the total operating air volume and the number of normal air outlets.

[0067] In one embodiment of the present application, Q i,m =Q m总 / (total number of vents - number of abnormal vents), where Q i,m is the initial air volume, Q m总 is the total operating air volume.

[0068] Step S240, obtaining the main pipe inlet pressure of the first air outlet according to the air volume of the first air outlet, the back pressure of the air outlet raceway of the first air outlet and a preset mapping relationship.

[0069] In one embodiment of the present application, the main pipe inlet pressure of the first air outlet is obtained according to the air volume of the first air outlet, the back pressure of the air outlet vortex zone of the first air outlet and a preset mapping relationship, which includes: dividing the first air outlet into a front section and a rear section, the front section is the hot air main pipe inlet section to the front direct injection section of the air outlet small sleeve, and the rear section is the front direct injection section of the air outlet small sleeve to the air outlet vortex section; according to the air volume of the first air outlet, the back pressure of the air outlet vortex zone of the first air outlet and a preset first mapping relationship, the rear section inlet pressure and the air outlet density of the first air outlet are obtained, and the first air outlet The air outlet density is the density of the cross-section of the rear section inlet of the first air outlet; the characteristic flow velocity of the first air outlet is obtained according to the air outlet density and the air duct flow velocity of the first air outlet, the air duct flow velocity of the first air outlet is obtained based on the air outlet air volume of the first air outlet, and the front section resistance loss coefficient of the first air outlet is obtained based on the characteristic flow velocity of the first air outlet and the preset second mapping relationship; the front section pressure drop of the first air outlet is obtained based on the front section resistance loss coefficient and the air outlet density of the first air outlet, and the sum of the rear section inlet pressure and the front section pressure drop of the first air outlet is used as the total pipe inlet pressure of the first air outlet.

[0070] In one embodiment of the present application, according to the air volume of the first air outlet i (i.e., the initial air volume Q i,m ) and the preset mapping table of the relationship between the air volume and back pressure of the tuyere and the pressure and density of the rear section inlet (i.e., the first preset relationship), calculate the density ρ of the rear section inlet of the first tuyere i i,2 , the pressure P of the inlet section of the first tuyere i i,2 .

[0071] ρ i,2 , P i,2 =f(Q i,m ,P i,5 ) Formula (1)

[0072] In formula (1), ρ i,2 is the density of the inlet section of the first tuyere i, P i,2 is the pressure of the inlet section of the first tuyere i, Q i,m is the initial air volume, P i,5 is the back pressure of the tuyere raceway of the first tuyere i. In this embodiment, ρ is obtained by the interpolation algorithm RBF algorithm. i,2 and P i,2 It is important to understand that RBF (Radial Basis Function) is a basis function in a function space, and these basis functions are all radial functions. The so-called radial function satisfies such a condition: for a certain fixed point, the function values ​​of the equidistant functions around the fixed point are the same.

[0073] In one embodiment of the present application, the air duct flow rate w of the first air outlet i is obtained by the air volume of the first air outlet i. i,2 , where the duct velocity is obtained by the air volume at the tuyere and the diameter of the small casing at the tuyere, and then based on the duct velocity and the density ρ of the rear inlet section i,2 (i.e., tuyere density) to calculate the characteristic velocity, including V i,2 =1.0*w i,2 * i,2 , where V i,2 is the characteristic flow velocity of the first tuyere i, w i,2 is the duct velocity of the first air outlet i, ρ i,2 is the density of the rear inlet section of the first tuyere i.

[0074] In one embodiment of the present application, according to the preset second mapping relationship (i.e., the mapping relationship table between characteristic flow rate and resistance loss coefficient), the front section resistance loss coefficient of the first air outlet i is obtained: i,12 =f(V i,2 ), where f i,12 is the front section resistance coefficient of the first air outlet i, (V i,2 ) is the characteristic flow velocity of the first air outlet i.

[0075] In one embodiment of the present application, obtaining the front-end pressure reduction of the first tuyere i based on the front-end resistance loss coefficient and the tuyere density of the first tuyere i includes:

[0076]

[0077] In formula (2), ΔP i,12 is the pressure reduction at the front of the first air outlet, f i,12 is the front section resistance coefficient of the first air outlet, ρ i,2 is the air outlet density of the first air outlet, w i,2 is the duct flow velocity of the first air outlet.

[0078] In one embodiment of the present application, the main pipe inlet pressure P of the first air outlet i is i,1 It is the sum of the pressure reduction in the front section and the inlet pressure in the rear section, that is,

[0079] Step S250, taking the initial air volume as the air volume of other air outlets, traversing and calculating the main pipe inlet pressure of other air outlets, adjusting the air volume of other air outlets based on the main pipe inlet pressure of other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of other air outlets and the first air outlet is less than a preset pressure threshold, and taking the adjusted distributed air volume of each other air outlet as the distributed air volume of each other air outlet.

[0080] In one embodiment of the present application, the initial air volume is used as the air volume of other air outlets, the main pipe inlet pressure of other air outlets is traversed and calculated, and the air volume of other air outlets is adjusted based on the main pipe inlet pressure of other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of other air outlets and the first air outlet is less than a preset pressure threshold, and the adjusted air volume of each other air outlet is used as the allocated air volume of each other air outlet, including: traversing all other air outlets, and taking other air outlets as the second air outlet in turn; dividing the second air outlet into a front section and a rear section, the front section is from the hot air main inlet section to the front direct injection section of the air outlet small sleeve, and the rear section is from the front direct injection section of the air outlet small sleeve to the air outlet swirl section; based on The rear section inlet pressure and the air outlet density of the second air outlet are obtained according to the air outlet volume of the second air outlet, the back pressure of the air outlet swirl zone of the second air outlet and the preset first mapping relationship, and the air outlet density of the second air outlet is the density of the rear section inlet cross section of the second air outlet; the characteristic flow velocity of the second air outlet is obtained according to the air outlet density and the duct flow velocity of the second air outlet, and the duct flow velocity of the second air outlet is obtained based on the air outlet volume of the second air outlet; the front section resistance loss coefficient of the second air outlet is obtained based on the characteristic flow velocity of the second air outlet and the preset second mapping relationship; the front section pressure drop of the second air outlet is obtained based on the front section resistance loss coefficient and the air outlet density of the second air outlet, and the sum of the rear section inlet pressure and the front section pressure drop of the second air outlet is taken as the total pipe inlet pressure of the second air outlet. If the difference between the main pipe inlet pressure of the second air outlet and the main pipe inlet pressure of the first air outlet is greater than a preset pressure threshold, the air volume of the second air outlet is adjusted based on the ratio of the main pipe inlet pressure of the first air outlet to the main pipe inlet pressure of the second air outlet, so that the adjusted air volume of the second air outlet is used as the allocated air volume of the second air outlet to complete the air volume allocation of the second air outlet; the next other air outlet is used as the second air outlet for air volume allocation until the air volume allocation of all other air outlets is completed to obtain the allocated air volume corresponding to all other air outlets.

[0081] In one embodiment of the present application, each other air outlet j (j=1, 2...n) is looped through, and the initial air volume is used as the air outlet air volume Q of other air outlet j. j,m , calculate the density ρ of the rear inlet section of other tuyere j j,2 , the pressure P of the rear inlet section of other tuyere j j,2 , the calculation method is the same as that of tuyere i. Calculate the pressure drop ΔP at the front section of tuyere j j,12 ,Right now The calculation method is the same as that of tuyere i. Calculate the total pipe inlet pressure P of other tuyere j j,1 =ΔP j,12 +P j,2 .

[0082] In one embodiment of the present application, the method for adjusting the air volume of other air outlets j includes: Where Q j ' ,mis the air volume distributed at outlet j, P i,1 is the main pipe inlet pressure of the first tuyere i, P j,1 is the total pipe inlet pressure of other tuyere j, so that P i,1 With P j,1 The difference is less than the preset pressure threshold.

[0083] In one embodiment of the present application, all other air outlets j are traversed, and the allocated air volumes are calculated for all other air outlets j.

[0084] In one embodiment of the present application, after the adjusted air volume of each other air outlet is used as the allocated air volume of each other air outlet, the method also includes: obtaining the allocated total air volume based on the allocated air volume of each other air outlet and the initial air volume of the first air outlet; if the difference between the allocated total air volume and the operating total air volume is greater than a preset air volume threshold, adjusting the initial air volume based on the ratio of the operating total air volume to the allocated total air volume to obtain the adjusted initial air volume; using the adjusted initial air volume as the air volume of the first air outlet, recalculating the adjusted main pipe inlet pressure of the first air outlet, and using the adjusted initial air volume as the air volume of the other air outlets. The air volume of each air outlet is calculated, and the adjusted main pipe inlet pressure of other air outlets is recalculated; the air volume of other air outlets is adjusted based on the adjusted main pipe inlet pressure of other air outlets and the adjusted main pipe inlet pressure of the first air outlet to obtain the adjusted distributed air volume of each other air outlet; the adjusted distributed total air volume is obtained according to the adjusted distributed air volume of each other air outlet and the adjusted initial air volume of the first air outlet; if the difference between the adjusted distributed total air volume and the operating total air volume is greater than the preset air volume threshold, the above steps are repeated until the difference between the adjusted distributed total air volume and the operating total air volume is less than or equal to the preset air volume threshold.

[0085] In one embodiment of the present application, the method for adjusting the air volume of the first air outlet i includes: Where Q i ' ,m is the adjusted initial air volume, Q i,m is the initial air volume, Q m总 is the total air volume, Q′ m总 To distribute the total air volume, Q m总 and Q′ m总 The difference is less than the preset air volume threshold.

[0086] See also Figure 7 , Figure 7 This is a block diagram of a blast furnace tuyere air volume distribution device shown in an exemplary embodiment of the present application. The device can be applied to Figure 1 The implementation environment shown is as follows. The device may also be applicable to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the device is applicable.

[0087] like Figure 7 As shown, the exemplary blast furnace tuyere air volume distribution device comprises:

[0088] The data input module 701 is used to obtain the blast furnace operation data, which includes the total air volume, the number of tuyere and the back pressure of the tuyere raceway of each tuyere.

[0089] The air volume calculation module 702 is used to take any air outlet as the first air outlet, and obtain the initial air volume based on the total operating air volume and the number of air outlets, and take the initial air volume as the air outlet air volume of the first air outlet;

[0090] The pressure calculation module 703 is used to obtain the main pipe inlet pressure of the first air outlet according to the air volume of the first air outlet, the back pressure of the air outlet raceway of the first air outlet and a preset mapping relationship;

[0091] The air volume distribution module 704 is used to use the initial air volume as the air volume of other air outlets, traverse and calculate the main pipe inlet pressure of other air outlets, and adjust the air volume of other air outlets based on the main pipe inlet pressure of other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of other air outlets and the first air outlet is less than a preset pressure threshold, and use the adjusted air volume of each other air outlet as the distributed air volume of each other air outlet.

[0092] Figure 8 The structure diagram of the computer system suitable for implementing the electronic device of the embodiment of the present application is shown. It should be noted that: Figure 8 The computer system 800 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0093] like Figure 8 As shown, the computer system 800 includes a central processing unit (CPU) 801, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 802 or the program loaded from the storage part 808 to the random access memory (RAM) 803, such as executing the method described in the above embodiment. In the RAM 803, various programs and data required for system operation are also stored. The CPU 801, ROM 802 and RAM 803 are connected to each other through a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0094] The following components are connected to the I / O interface 805: an input section 806 including a keyboard, a mouse, etc.; an output section 807 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 808 including a hard disk, etc.; and a communication section 809 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 809 performs communication processing via a network such as the Internet. A drive 810 is also connected to the I / O interface 805 as needed. A removable medium 811, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 810 as needed so that a computer program read therefrom is installed into the storage section 808 as needed.

[0095] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 809, and / or installed from a removable medium 811. When the computer program is executed by a central processing unit (CPU) 801, various functions defined in the system of the present application are executed.

[0096] It should be noted that the computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0097] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0098] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0099] Another aspect of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor of a computer, causes the computer to execute the blast furnace tuyere air volume distribution method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0100] Another aspect of the present application also provides a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of a computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the blast furnace tuyere air volume distribution method provided in each of the above embodiments.

[0101] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A method for distributing air volume at a blast furnace tuyere, characterized in that: The blast furnace tuyere air volume distribution calculation method comprises: Acquire blast furnace operation data, the blast furnace operation data including total operating air volume, number of tuyere and tuyere raceway back pressure of each tuyere, Taking any one of the air outlets as the first air outlet, and obtaining an initial air volume based on the total operating air volume and the number of the air outlets, and taking the initial air volume as the air outlet air volume of the first air outlet; Obtaining the main pipe inlet pressure of the first air outlet according to the air volume of the first air outlet, the back pressure of the air outlet raceway of the first air outlet and a preset mapping relationship; The initial air volume is used as the air volume of other air outlets, the main pipe inlet pressure of the other air outlets is traversed and calculated, and the air volume of the other air outlets is adjusted based on the main pipe inlet pressure of the other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of the other air outlets and the first air outlet is less than a preset pressure threshold, and the adjusted air volume of each other air outlet is used as the allocated air volume of each other air outlet.

2. The method for distributing air volume at blast furnace tuyere according to claim 1, characterized in that: After using the adjusted air volume of each of the other air outlets as the allocated air volume of each of the other air outlets, the method further includes: Obtaining a total distributed air volume based on the distributed air volumes of each of the other air outlets and the initial air volume of the first air outlet; If the difference between the allocated total air volume and the operating total air volume is greater than a preset air volume threshold, the initial air volume is adjusted based on the ratio of the operating total air volume to the allocated total air volume to obtain an adjusted initial air volume; Using the adjusted initial air volume as the air volume of the first air outlet, recalculating the adjusted main pipe inlet pressure of the first air outlet, and using the adjusted initial air volume as the air volume of other air outlets, recalculating the adjusted main pipe inlet pressure of other air outlets; Adjusting the air volume of the other air outlets based on the adjusted main pipe inlet pressure of the other air outlets and the adjusted main pipe inlet pressure of the first air outlet to obtain the adjusted distributed air volume of each other air outlet; Obtaining the adjusted distributed total air volume according to the adjusted distributed air volumes of each of the other air outlets and the adjusted initial air volume of the first air outlet; If the difference between the adjusted total allocated air volume and the operating total air volume is greater than the preset air volume threshold, repeat the above steps until the difference between the adjusted total allocated air volume and the operating total air volume is less than or equal to the preset air volume threshold.

3. The method for distributing air volume at blast furnace tuyere according to claim 1, characterized in that: The main pipe inlet pressure of the first air outlet is obtained according to the air volume of the first air outlet, the back pressure of the air outlet raceway of the first air outlet and a preset mapping relationship, including: The first tuyere is divided into a front section and a rear section, wherein the front section is from the hot air main pipe inlet section to the front direct injection section of the tuyere small sleeve, and the rear section is from the front direct injection section of the tuyere small sleeve to the tuyere swirl section; According to the air volume of the first air outlet, the back pressure of the air outlet raceway of the first air outlet and a preset first mapping relationship, the rear section inlet pressure and the air outlet density of the first air outlet are obtained, wherein the air outlet density of the first air outlet is the density of the inlet section of the rear section of the first air outlet; The characteristic flow velocity of the first air outlet is obtained according to the air outlet density and the air duct flow velocity of the first air outlet, the air duct flow velocity of the first air outlet is obtained based on the air volume of the first air outlet, and the front section resistance loss coefficient of the first air outlet is obtained based on the characteristic flow velocity of the first air outlet and a preset second mapping relationship; The front section pressure reduction of the first air outlet is obtained based on the front section resistance loss coefficient and the air outlet density of the first air outlet, and the sum of the rear section inlet pressure and the front section pressure reduction of the first air outlet is used as the main pipe inlet pressure of the first air outlet.

4. The method for distributing air volume at blast furnace tuyere according to claim 1, characterized in that: The initial air volume is used as the air volume of other air outlets, the main pipe inlet pressure of the other air outlets is traversed and calculated, and the air volume of the other air outlets is adjusted based on the main pipe inlet pressure of the other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of the other air outlets and the first air outlet is less than a preset pressure threshold, and the adjusted air volume of each of the other air outlets is used as the distributed air volume of each of the other air outlets, including: Traverse all other air outlets and use the other air outlets as the second air outlet in turn; The second tuyere is divided into a front section and a rear section, wherein the front section is from the hot air main pipe inlet section to the front direct injection section of the tuyere small sleeve, and the rear section is from the front direct injection section of the tuyere small sleeve to the tuyere swirl section; Obtaining a rear-end inlet pressure and an air outlet density of the second air outlet according to the air outlet air volume of the second air outlet, the air outlet raceway back pressure of the second air outlet, and a preset first mapping relationship; The characteristic flow velocity of the second air outlet is obtained according to the air outlet density and the air duct flow velocity of the second air outlet, the air duct flow velocity of the second air outlet is obtained based on the air outlet air volume of the second air outlet, and the front section resistance loss coefficient of the second air outlet is obtained based on the characteristic flow velocity of the second air outlet and a preset second mapping relationship; The front-end pressure reduction of the second air outlet is obtained based on the front-end resistance loss coefficient and the air outlet density of the second air outlet, and the sum of the rear-end inlet pressure and the front-end pressure reduction of the second air outlet is used as the main pipe inlet pressure of the second air outlet; If the difference between the main pipe inlet pressure of the second air outlet and the main pipe inlet pressure of the first air outlet is greater than the preset pressure threshold, the air volume of the second air outlet is adjusted based on the ratio of the main pipe inlet pressure of the first air outlet to the main pipe inlet pressure of the second air outlet, and the adjusted air volume of the second air outlet is used as the distributed air volume of the second air outlet to complete the air volume distribution of the second air outlet; The next other air outlet is used as the second air outlet to perform the air volume distribution until the air volume distribution is completed for all the other air outlets, so as to obtain the distributed air volume corresponding to all the other air outlets.

5. The method for distributing air volume at blast furnace tuyere according to claim 3, characterized in that: The front-end pressure reduction of the first tuyere is obtained based on the front-end resistance loss coefficient and the tuyere density of the first tuyere, including: Where ΔP i,12 is the pressure reduction at the front section of the first air outlet, f i,12 is the front section resistance coefficient of the first tuyere, ρ i,2 is the tuyere density of the first tuyere, w i,2 is the air duct flow rate of the first air outlet.

6. The method for distributing air volume at blast furnace tuyere according to any one of claims 1 to 4, characterized in that: Obtaining the initial air volume based on the total operating air volume and the number of air outlets includes: Obtaining the blockage status of each air outlet, taking the air outlets with the blocked status as abnormal air outlets, and counting the number of the abnormal air outlets; The difference between the number of air outlets and the number of abnormal air outlets is taken as the number of normal air outlets; The initial air volume is obtained based on the total operating air volume and the number of normal air outlets.

7. The method for distributing air volume at blast furnace tuyere according to any one of claims 1 to 4, characterized in that: Before obtaining blast furnace operation data, the following are included: The blast furnace top pressure and bed pressure difference of the blast furnace are obtained by a pressure sensor in the blast furnace; The back pressure of the tuyere raceway is obtained based on the sum of the blast furnace top pressure and the bed pressure difference.

8. A blast furnace tuyere air volume distribution device, characterized in that: The blast furnace tuyere air volume distribution device comprises: The data input module is used to obtain the blast furnace operation data, wherein the blast furnace operation data includes the total operating air volume, the number of tuyere and the back pressure of the tuyere raceway of each tuyere, An air volume calculation module, used to take any air outlet as a first air outlet, obtain an initial air volume based on the total operating air volume and the number of air outlets, and take the initial air volume as the air outlet air volume of the first air outlet; a pressure calculation module, configured to obtain a main pipe inlet pressure of the first air outlet according to the air volume of the first air outlet, the back pressure of the air outlet raceway of the first air outlet, and a preset mapping relationship; An air volume distribution module is used to use the initial air volume as the air volume of other air outlets, traverse and calculate the main pipe inlet pressure of the other air outlets, and adjust the air volume of the other air outlets based on the main pipe inlet pressure of the other air outlets and the main pipe inlet pressure of the first air outlet, so that the difference between the main pipe inlet pressure of the other air outlets and the first air outlet is less than a preset pressure threshold, and use the adjusted air volume of each other air outlet as the distributed air volume of each other air outlet.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the electronic device to implement the blast furnace tuyere air volume distribution method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor of a computer, the computer is caused to execute the blast furnace tuyere air volume distribution method as described in any one of claims 1-7.

Images