Method and device for determining uniformity of blast kinetic energy, electronic equipment and medium

Abstract

The invention relates to the technical field of metallurgical industry, and discloses a blast kinetic energy uniformity degree determination method and device, electronic equipment and a medium. According to the method, blast furnace operation indexes are obtained, and blast furnace operation parameters corresponding to the front end of a tuyere small sleeve and the tuyere small sleeve respectively are obtained according to the blast furnace operation indexes; calculating according to the blast furnace operation parameters corresponding to the front end of the tuyere small sleeve to obtain front-end gas pressure corresponding to the front end of the tuyere small sleeve, and calculating the front-end gas pressure according to the blast furnace operation parameters corresponding to the tuyere small sleeve to obtain internal gas pressure corresponding to the tuyere small sleeve; determining the conventional blast kinetic energy of the low-carbon blast furnace under the conventional working condition according to the front-end gas pressure, and determining the low-carbon blast kinetic energy of the low-carbon blast furnace under the low-carbon working condition according to the internal gas pressure, so as to determine the blast kinetic energy uniformity of the low-carbon blast furnace under the low-carbon working condition according to the conventional blast kinetic energy and the low-carbon blast kinetic energy; the method for determining the uniformity of the blast kinetic energy is more practical and more accurate.

Description

Technical Field

[0001] The present application relates to the technical field of metallurgical industry, and in particular to a method, device, electronic equipment and medium for determining the uniformity of kinetic energy of a blast. Background Art

[0002] Against the backdrop of global climate change, reducing carbon emissions has become a consensus of the international community. As one of the main areas of carbon emissions, the steel industry is facing unprecedented pressure to reduce carbon emissions. As a key path for the transformation and upgrading of the steel industry, low-carbon blast furnace technology has received extensive attention and research in recent years. This technology aims to achieve low-carbonization of the ironmaking process by optimizing blast furnace operating parameters, introducing alternative fuels and raw materials, and applying advanced coal gasification technology. However, in the process of promoting low-carbon blast furnace technology, the application of innovative technologies such as hydrogen-rich coal gas injection has made it possible to reduce fossil fuel dependence and carbon emissions, but it has also brought new technical challenges to blast furnace operation.

[0003] When hydrogen-rich coal gas and oxygen burn in a blast furnace, due to the combustion characteristics of hydrogen, volume changes and local airflow dynamics effects that are significantly different from those of traditional coal gas will occur. These changes not only lead to uneven distribution of blast kinetic energy in the lower part of the blast furnace, but also complicate the airflow resistance characteristics inside the blast furnace, which in turn poses a direct threat to the stability and efficiency of the blast furnace smelting process. The traditional blast kinetic energy calculation method, based on the traditional coal gas composition and combustion characteristics design, can no longer accurately reflect the actual conditions of the airflow under low-carbon blast furnace conditions, and therefore cannot provide effective guidance for blast furnace operation.

[0004] More importantly, the stability of airflow and pressure in the lower part of the blast furnace is essential to maintain the balanced operation of the entire blast furnace system. Uneven airflow distribution will not only reduce the production efficiency of the blast furnace, but may also cause damage to the structure inside the furnace and the occurrence of safety accidents. Therefore, how to accurately monitor and evaluate the airflow changes in the tuyere small sleeve area, and then determine the uniformity of the blast kinetic energy to ensure the stable distribution of airflow and pressure in the lower part of the blast furnace, has become a technical problem that needs to be overcome in the current low-carbon blast furnace technology research field. Obviously, there is an urgent need for a method to determine the uniformity of blast kinetic energy to solve the above problems.

[0005] It should be noted that the above content only provides background technical information related to the present application and does not necessarily constitute prior art. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present application provides a method, device, electronic equipment and medium for determining the uniformity of kinetic energy of air blowing, so as to solve the problem that it is difficult to accurately determine the uniformity of kinetic energy of air blowing.

[0007] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0008] According to one aspect of an embodiment of the present application, a method for determining the uniformity of blast kinetic energy is provided, comprising: obtaining a blast furnace operating index, so as to obtain blast furnace operating parameters corresponding to the front end of a tuyere sleeve and the tuyere sleeve respectively according to the blast furnace operating index, wherein hot blast enters a low-carbon blast furnace through the front end of the tuyere sleeve and the tuyere sleeve in sequence, and the blast furnace operating index comprises tuyere size, gas density and gas velocity; calculating according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve, to obtain the front end gas pressure corresponding to the front end of the tuyere sleeve, and calculating the front end gas pressure according to the blast furnace operating parameters corresponding to the tuyere sleeve, to obtain the internal gas pressure corresponding to the tuyere sleeve; determining the conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions according to the front end gas pressure, and determining the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the internal gas pressure, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy.

[0009] In one embodiment of the present application, based on the aforementioned scheme, calculation is performed according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve to obtain the front end gas pressure corresponding to the front end of the tuyere sleeve, including: obtaining the surrounding pipe gas pressure corresponding to the hot blast surrounding pipe; calculating according to the first length, the first diameter, the first gas density and the first gas velocity of the front end of the tuyere sleeve to obtain the first along-the-way pressure loss at the front end of the tuyere sleeve, and calculating according to the first gas density and the first gas velocity to obtain the first local pressure loss at the front end of the tuyere sleeve, wherein the blast furnace operating parameters corresponding to the front end of the tuyere sleeve include the first length, the first diameter, the first gas density and the first gas velocity; calculating according to the first along-the-way pressure loss and the first local pressure loss to obtain the first pressure difference from the hot blast surrounding pipe to the front end of the tuyere sleeve; calculating based on the surrounding pipe gas pressure and the first pressure difference to obtain the front end gas pressure.

[0010] In one embodiment of the present application, based on the aforementioned scheme, the conventional blast kinetic energy of the low-carbon blast furnace under normal operating conditions is determined according to the front-end gas pressure, including: obtaining the first gas volume and the first gas temperature at the front end of the tuyere sleeve; calculating based on the first gas density, the first gas volume, the first gas temperature, the number of tuyere and the front-end gas pressure to obtain the first gas mass per unit time of a single tuyere; calculating according to the first gas mass and the first gas velocity to obtain the conventional blast kinetic energy.

[0011] In one embodiment of the present application, based on the aforementioned scheme, the front end gas pressure is calculated according to the blast furnace operating parameters corresponding to the tuyere sleeve to obtain the internal gas pressure corresponding to the tuyere sleeve, including: calculating according to the second length, second diameter, second gas density and second gas velocity of the tuyere sleeve to obtain the second along-the-way pressure loss of the tuyere sleeve, and calculating according to the second gas density and the second gas velocity to obtain the second local pressure loss of the tuyere sleeve, wherein the blast furnace operating parameters corresponding to the tuyere sleeve include the second length, the second diameter, the second gas density and the second gas velocity; calculating according to the second along-the-way pressure loss and the second local pressure loss to obtain the second pressure difference generated by the combustion of gas in the tuyere sleeve; calculating according to the second pressure difference and the front end gas pressure to obtain the internal gas pressure.

[0012] In one embodiment of the present application, based on the aforementioned scheme, the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon conditions is determined according to the internal gas pressure, including: obtaining the second gas volume and the second gas temperature of the tuyere sleeve; calculating based on the second gas density, the second gas volume, the second gas temperature, the number of tuyere and the internal gas pressure to obtain the second gas mass per unit time of a single tuyere; calculating according to the second gas mass and the second gas velocity to obtain the low-carbon blast kinetic energy.

[0013] In one embodiment of the present application, based on the aforementioned scheme, the uniformity of the blast kinetic energy is determined by any one of the following methods: calculating according to the conventional blast kinetic energy and the low-carbon blast kinetic energy to obtain the blast kinetic energy difference, and calculating the uniformity of the blast kinetic energy based on the blast kinetic energy difference and the conventional blast kinetic energy; determining the uniformity of the blast kinetic energy according to the ratio of the low-carbon blast kinetic energy to the conventional blast kinetic energy.

[0014] In one embodiment of the present application, based on the aforementioned scheme, after determining the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy, the method also includes: comparing the uniformity of the blast kinetic energy with a preset threshold; if the uniformity of the blast kinetic energy is less than or equal to the preset threshold, it is determined that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uniform, and the low-carbon blast furnace is not adjusted; if the uniformity of the blast kinetic energy is greater than the preset threshold, it is determined that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uneven, and the second diameter of the tuyere sleeve, the surrounding pipe gas pressure or the blowing pressure of the low-carbon blast furnace are adjusted until the uniformity of the blast kinetic energy is less than or equal to the preset threshold, so that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uniform.

[0015] According to one aspect of an embodiment of the present application, a device for determining the uniformity of blast kinetic energy is provided, comprising: an acquisition module, used to acquire blast furnace operating indicators, so as to acquire blast furnace operating parameters corresponding to the front end of the tuyere sleeve and the tuyere sleeve respectively according to the blast furnace operating indicators, wherein hot blast enters the low-carbon blast furnace through the front end of the tuyere sleeve and the tuyere sleeve in sequence, and the blast furnace operating indicators include tuyere size, gas density and gas velocity; a calculation module, used to calculate according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve, to obtain the front end gas pressure corresponding to the front end of the tuyere sleeve, and to calculate the front end gas pressure according to the blast furnace operating parameters corresponding to the tuyere sleeve, to obtain the internal gas pressure corresponding to the tuyere sleeve; a determination module, used to determine the conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions according to the front end gas pressure, and to determine the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the internal gas pressure, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy.

[0016] According to one aspect of an embodiment of the present application, an electronic device is provided, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device implements a method for determining the uniformity of kinetic energy of a blast as described in any one of the above embodiments.

[0017] 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 method for determining the uniformity of kinetic energy of a blast as described in any one of the above-mentioned embodiments.

[0018] The beneficial effects of the present application: The present application calculates the blast furnace operating parameters corresponding to the front end of the tuyere sleeve and the tuyere sleeve respectively, and obtains the front end gas pressure corresponding to the front end of the tuyere sleeve and the internal gas pressure corresponding to the tuyere sleeve respectively, and then calculates the conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions, and the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon conditions, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon conditions based on the conventional blast kinetic energy and the low-carbon blast kinetic energy, thereby solving the problem that the uniformity of the blast kinetic energy of the low-carbon blast furnace is difficult to determine, and then facilitates the adjustment of the determined uniformity of the blast kinetic energy, thereby improving the accuracy and efficiency of determining the uniformity of the blast kinetic energy.

[0019] In addition, by comparing the determined blast kinetic energy uniformity with the preset threshold value, the low-carbon blast furnace is regulated, the local airflow resistance change caused by the combustion of hydrogen-rich coal gas is improved, the balance of blast kinetic energy distribution is ensured, and the smelting efficiency of the blast furnace is improved; different operations are implemented for different furnace conditions, making the regulation simple and easy, highly operable, and universal. Further, by optimizing the tuyere small sleeve structure and adjusting the blast and gas injection pressure to regulate the low-carbon blast furnace, the problem of uneven blast kinetic energy distribution caused by the local airflow resistance change during the hydrogen-rich coal gas injection process is solved, ensuring the stability and efficiency of the smelting process in the blast furnace.

[0020] 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

[0021] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a schematic diagram showing an exemplary embodiment of the present application showing the hydrogen-rich coal gas injection and the blast air flow converging and burning in a tuyere sleeve;

[0023] Figure 2 is a flow chart of a method for determining the uniformity of kinetic energy of air blowing according to an exemplary embodiment of the present application;

[0024] Figure 3 is a flow chart of a method for determining the uniformity of kinetic energy of air blowing according to another exemplary embodiment of the present application;

[0025] Figure 4a is a schematic diagram of the blast kinetic energy of each tuyere under low-carbon blast furnace working conditions shown in an exemplary embodiment of the present application;

[0026] Figure 4b is a schematic diagram of the blast kinetic energy of each tuyere under the first adjusted low-carbon blast furnace working condition shown in an exemplary embodiment of the present application;

[0027] Figure 4c is a schematic diagram of the blast kinetic energy of each tuyere under the second adjusted low-carbon blast furnace working condition shown in an exemplary embodiment of the present application;

[0028] Figure 4d is a schematic diagram of the blast kinetic energy of each tuyere under low-carbon blast furnace working conditions shown in another exemplary embodiment of the present application;

[0029] Figure 4e is a schematic diagram of the blast kinetic energy of each tuyere under the first adjusted low-carbon blast furnace working condition shown in another exemplary embodiment of the present application;

[0030] Figure 4f is a schematic diagram of the blast kinetic energy of each tuyere under the second adjusted low-carbon blast furnace working condition shown in another exemplary embodiment of the present application;

[0031] Figure 5 is a block diagram of a device for determining the uniformity of kinetic energy of air blowing, shown in an exemplary embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0033] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. 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 implementation methods, 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 understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0034] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present application in a schematic manner, and therefore the illustrations 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 arbitrarily, and the component layout may also be more complicated.

[0035] 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.

[0036] First of all, it should be explained that the hot air surrounding pipe is a hot air duct compensation device. It is used to solve the hot air duct compensation problem that the hot air main pipe and the hot air surrounding pipe are not at the same height, which cannot be achieved by existing compensation devices and methods. The blast furnace hot air surrounding pipe receives the hot air sent from the hot blast stove, and then sends the hot air into the blast furnace through the air supply device.

[0037] The blast furnace tuyere sleeve is an important device in the blast furnace air intake system. The main function of the blast furnace tuyere sleeve is to send hot air into the blast furnace. For example, in steel production, the blast furnace tuyere sleeve is a key process part on the blast furnace of the ironmaking plant. The high-temperature hot air blown in and the coke at the bottom of the furnace are oxidized and burned to generate CO, and CO is reduced to iron in the form of oxides at high temperature.

[0038] Low-carbon blast furnaces are injected with rich hydrogen into the blast furnace at the tuyere sleeve. In the tuyere sleeve, part of the injected gas burns with the oxygen in the hot air, resulting in volume expansion, which will produce greater resistance locally and affect the air volume entering. Figure 1 As shown, Figure 1 This is a schematic diagram of an exemplary embodiment of the present application showing the confluence and combustion of hydrogen-rich coal gas injection and blast airflow in a tuyere sleeve. The blast kinetic energy difference with that of a conventional blast furnace is used to characterize the uniformity of the blast of a low-carbon blast furnace under the same parameter conditions, and the balance of the air supply system of the low-carbon blast furnace is achieved by regulating the parameters of the lower part of the blast furnace.

[0039] Figure 2 is a flow chart of a method for determining the uniformity of kinetic energy of air blowing according to an exemplary embodiment of the present application. The method for determining the uniformity of kinetic energy of air blowing can be executed by a computing and processing device. The computing and processing device can be Figure 1 The computer device 102 shown in FIG. Figure 2 As shown, the method for determining the uniformity of kinetic energy of the blast includes at least steps S210 to S230, which are described in detail as follows:

[0040] In step S210, the blast furnace operation index is obtained to obtain the blast furnace operation parameters corresponding to the front end of the tuyere sleeve and the tuyere sleeve respectively according to the blast furnace operation index.

[0041] Among them, hot air enters the low-carbon blast furnace through the front end of the tuyere sleeve and the tuyere sleeve in turn. The blast furnace operating indicators include tuyere size, gas density and gas velocity.

[0042] In one embodiment of the present application, the blast furnace operating parameters corresponding to the front end of the tuyere sleeve include but are not limited to the first length of the front end of the tuyere sleeve, the first diameter of the front end of the tuyere sleeve, the first gas density at the front end of the tuyere sleeve and the first gas velocity at the front end of the tuyere sleeve, and the blast furnace operating parameters corresponding to the tuyere sleeve include but are not limited to the second length of the tuyere sleeve, the second diameter of the tuyere sleeve, the second gas density of the tuyere sleeve and the second gas velocity of the tuyere sleeve.

[0043] In step S220, the front end gas pressure corresponding to the front end of the tuyere sleeve is calculated according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve, and the front end gas pressure is calculated according to the blast furnace operating parameters corresponding to the tuyere sleeve to obtain the internal gas pressure corresponding to the tuyere sleeve.

[0044] In one embodiment of the present application, a process of calculating according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve to obtain the front end gas pressure corresponding to the front end of the tuyere sleeve includes the following steps: obtaining the surrounding pipe gas pressure corresponding to the hot blast surrounding pipe; calculating according to the first length, the first diameter, the first gas density and the first gas velocity of the front end of the tuyere sleeve to obtain the first along-the-way pressure loss at the front end of the tuyere sleeve, and calculating according to the first gas density and the first gas velocity to obtain the first local pressure loss at the front end of the tuyere sleeve, wherein the blast furnace operating parameters corresponding to the front end of the tuyere sleeve include the first length, the first diameter, the first gas density and the first gas velocity; calculating according to the first along-the-way pressure loss and the first local pressure loss to obtain the first pressure difference from the hot blast surrounding pipe to the front end of the tuyere sleeve; and calculating based on the surrounding pipe gas pressure and the first pressure difference to obtain the front end gas pressure.

[0045] In this embodiment, the resistance loss ΔP from the hot blast pipe to the front end of the tuyere sleeve is calculated by using the basic operating parameters of the blast furnace tuyere blast, that is, the blast furnace operating parameters corresponding to the front end of the tuyere sleeve. 0 That is, the first pressure difference, and according to the blast pressure P at the hot air surrounding pipe 0 That is, the surrounding pipe gas pressure, and the blast pressure P at the front end of the tuyere sleeve under conventional blast furnace conditions is obtained. 1 That is, the front gas pressure, namely P 1 =P 0 -ΔP 0 .

[0046] In this embodiment, the resistance loss ΔP from the hot air surrounding pipe to the tuyere sleeve is calculated according to the following formula (1): 0 Then, according to formula (2), the blast pressure P at the front end of the tuyere sleeve under conventional blast furnace conditions is obtained: 1 :

[0047]

[0048] P 1 =P 0 -ΔP 0 Formula (2)

[0049] In equations (1) and (2): ΔP 0 Indicates the resistance loss from the hot air surrounding pipe to the front end of the tuyere sleeve, unit: Pa; ΔP 0f It indicates the resistance loss along the front end of the tuyere sleeve, i.e. the first pressure loss along the way, unit: Pa; ΔP 0l Indicates the local resistance loss at the front end of the tuyere sleeve, i.e. the first local pressure loss, unit: Pa; λ 0 Represents the drag coefficient along the front end of the preset tuyere sleeve; ξ 0Indicates the local resistance coefficient at the front end of the preset tuyere sleeve; L 0 Indicates the total length of the front end of the tuyere sleeve, i.e. the first length, in m; d 0 Indicates the diameter of the front end of the tuyere sleeve, i.e. the first diameter, unit: m; ρ 0 Indicates the blast density at the front end of the tuyere sleeve, i.e. the first gas density, unit: kg / m 3 ;v 0 Indicates the blast speed and first gas speed at the front end of the tuyere sleeve, unit: m / s; P 1 It indicates the blast pressure at the front end of the tuyere sleeve under normal blast furnace working conditions, unit: Pa; P 0 Indicates the blast pressure at the hot air surrounding pipe, unit: Pa.

[0050] In one embodiment of the present application, the front-end gas pressure is calculated according to the blast furnace operating parameters corresponding to the tuyere sleeve to obtain the internal gas pressure corresponding to the tuyere sleeve, and the process includes the following steps: according to the second length, second diameter, second gas density and second gas velocity of the tuyere sleeve, the second along-the-line pressure loss of the tuyere sleeve is calculated, and according to the second gas density and the second gas velocity, the second local pressure loss of the tuyere sleeve is calculated, wherein the blast furnace operating parameters corresponding to the tuyere sleeve include the second length, second diameter, second gas density and second gas velocity; according to the second along-the-line pressure loss and the second local pressure loss, the second pressure difference generated by the combustion of the gas in the tuyere sleeve is calculated; according to the second pressure difference and the front-end gas pressure, the internal gas pressure is calculated.

[0051] In this embodiment, under the low-carbon blast furnace working condition, considering the gas combustion efficiency η, the diameter d of the tuyere sleeve is first preset. 1 , and then according to the gas injection medium and gas injection amount Blowing pressure P RG The other parameters are consistent with those of conventional blast furnaces. The resistance loss ΔP generated by the combustion of coal gas in the tuyere sleeve is calculated. 1 That is, the second pressure difference; according to the blast pressure P at the front end of the tuyere sleeve 1 The resistance loss ΔP caused by the combustion of coal gas at the tuyere sleeve 1 Calculate and obtain the hot air-gas pressure P of the tuyere sleeve under the low-carbon blast furnace working condition. 2 The internal gas pressure, or P 2 =P 1 -ΔP 1 ; or, according to the blast pressure P at the hot air enclosure 0 , the resistance loss from the hot air surrounding pipe to the front end of the tuyere small sleeve ΔP 0 The resistance loss ΔP caused by the combustion of coal gas at the tuyere sleeve 1The hot air-gas pressure P of the tuyere sleeve obtained under low carbon blast furnace conditions 2 , that is, P 2 =P 0 -ΔP 0 -ΔP 1 , which can also be written as P 2 =P 0 -(ΔP 0 +ΔP 1 ).

[0052] In this embodiment, the gas combustion efficiency is defined as η. The gas combustion efficiency refers to the proportion of effective energy converted during the mixed combustion of hydrogen-rich gas and hot air in the tuyere sleeve under low-carbon blast furnace conditions, as shown in formula (3):

[0053]

[0054] In formula (3), η represents the gas combustion efficiency, %; Q RG1 —Gas volume before entering the blast furnace, unit: m 3 / min; —Gas volume injected, unit: m 3 / min.

[0055] Furthermore, the low carbon blast furnace operation mode is to inject different gas media, and the injected gas includes COG, CH 4 , H 2 And one or more of carbon-hydrogen coupled injection of coal gas, etc. Further, for different injection media, the coal gas combustion efficiency η value is also different, COG, CH 4 , H 2 The gas combustion efficiency η of the carbon-hydrogen coupling injection gas is set to 20%-25%, 10%-15%, 25%-30% and 15%-20% respectively. It can be understood that the different gas combustion efficiencies caused by the injection of different gas media lead to different gas combustion masses and velocities in the tuyere sleeve after combustion, so the average blast kinetic energy under low-carbon blast furnace conditions is The injection gas is H 2 For example, the gas combustion efficiency η and the average blast kinetic energy under low-carbon blast furnace conditions There is a positive correlation, specifically: the greater the gas combustion efficiency η, the greater the hot air-gas mixture mass m per unit time at a single tuyere. 1 The larger the value, the average velocity v of hot air and gas in the small air outlet sleeve under low carbon working conditions 1 The larger the value, the average blast kinetic energy under low carbon blast furnace conditions It is understandable that the above description is only for illustration and does not limit the gas combustion efficiency η and the average blast kinetic energy under low-carbon blast furnace conditions. The specific relationship is determined according to the actual impact of the injected coal gas on the gas quality and gas velocity after combustion. This application does not limit this, nor should it bring any limitation to the functions and scope of use of the embodiments of this application.

[0056] In this embodiment, the resistance loss ΔP generated by the combustion of gas in the tuyere sleeve is calculated according to the following formula (4): 1 According to the following formula (5), the hot air-gas pressure P of the tuyere sleeve under the low-carbon blast furnace working condition is calculated: 2 :

[0057]

[0058] P 2 =P 1 -ΔP 1 =P 0 -ΔP 0 -ΔP 1 or P 2 =P 0 -(ΔP 0 +ΔP 1 ) Formula (5)

[0059] In equations (4) and (5), ΔP 1 Indicates the resistance loss of the tuyere sleeve under low carbon working conditions, unit: Pa; ΔP 1f It indicates the resistance loss along the tuyere sleeve under low carbon working conditions, that is, the second pressure loss along the tuyere sleeve, unit: Pa; ΔP 1l It indicates the local resistance loss of the tuyere sleeve under low carbon working conditions, that is, the second local pressure loss, unit: Pa; λ 1 represents the resistance coefficient along the tuyere sleeve under low carbon working conditions; ξ 1 Indicates the local resistance coefficient of the tuyere sleeve under low carbon conditions; L 1 Indicates the length of the tuyere sleeve, i.e. the second length, in m; d 1 Indicates the diameter of the tuyere sleeve, i.e. the second diameter, unit: m; ρ 1 It indicates the average density of hot air and coal gas in the tuyere small set under low carbon working conditions, that is, the second gas density, unit: kg / m 3 ;v 1 It indicates the average speed of hot air and coal gas in the tuyere small set under low carbon working conditions. The second gas speed is in m / s. 2 It indicates the pressure of hot air-gas in the tuyere sleeve under low-carbon blast furnace operating conditions, that is, the internal gas pressure, unit: Pa.

[0060] In step S230, the conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions is determined according to the front-end gas pressure, and the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions is determined according to the internal gas pressure, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions based on the conventional blast kinetic energy and the low-carbon blast kinetic energy.

[0061] In one embodiment of the present application, the process of determining the conventional blast kinetic energy of a low-carbon blast furnace under normal operating conditions based on the front-end gas pressure includes the following steps: obtaining the first gas volume and the first gas temperature at the front end of the tuyere sleeve; calculating based on the first gas density, the first gas volume, the first gas temperature, the number of tuyere sleeves and the front-end gas pressure to obtain the first gas mass per unit time of a single tuyere; calculating based on the first gas mass and the first gas velocity to obtain the conventional blast kinetic energy.

[0062] In one embodiment of the present application, the process of determining the low-carbon blast kinetic energy of a low-carbon blast furnace under low-carbon conditions based on the internal gas pressure includes the following steps: obtaining the second gas volume and the second gas temperature of the tuyere sleeve; calculating based on the second gas density, the second gas volume, the second gas temperature, the number of tuyere and the internal gas pressure to obtain the second gas mass per unit time of a single tuyere; calculating based on the second gas mass and the second gas velocity to obtain the low-carbon blast kinetic energy.

[0063] In this embodiment, the calculation formula of the kinetic energy of the blast is: The kinetic energy of the blast furnace under conventional blast furnace conditions and low-carbon blast furnace conditions is obtained. and According to formula (7), the average blast kinetic energy under conventional blast furnace conditions can be obtained: According to formula (8), the average blast kinetic energy under low-carbon blast furnace conditions can be obtained:

[0064]

[0065] In formula (6) and formula (7), —The average blast kinetic energy under conventional blast furnace conditions is the conventional blast kinetic energy, unit: kJ / s; Q 0 —Blast volume is the volume of the first gas, unit: m 3 / min; m 0 —The blast mass per unit time of a single tuyere is the mass of the first gas, unit: kg / s; t 0 —hot air temperature is the first gas temperature, unit: K; n—number of tuyere, that is, the number of tuyere; ρ 0 —The air density at the front end of the tuyere sleeve, unit: kg / m3; v 0 —The blast speed at the front end of the tuyere sleeve, unit: m / s; P 1—Blast pressure at the front end of the tuyere sleeve under conventional blast furnace conditions, unit: Pa; —The average blast kinetic energy under conventional low-carbon blast furnace conditions is the low-carbon blast kinetic energy, unit: kJ / s; Q 1 —The total amount of hot air-gas mixture is the volume of the second gas, unit: m 3 / min; m 1 —The mass of hot air-gas mixture per unit time at a single tuyere is the mass of the second gas, unit: kg / s; t 1 —Hot air-gas mixture temperature, i.e., the second gas temperature, unit: K; ρ 1 —Average density of hot air and gas in the tuyere small set under low carbon working conditions, unit: kg / m3; v 1 —Average velocity of hot air and gas in the tuyere under low carbon working conditions, unit: m / s; P 2 —The pressure of hot air-gas in the tuyere sleeve under low-carbon blast furnace working conditions, unit: Pa.

[0066] In one embodiment of the present application, the uniformity of the blast kinetic energy is determined by any one of the following methods: calculating based on conventional blast kinetic energy and low-carbon blast kinetic energy to obtain the blast kinetic energy difference, and calculating the uniformity of the blast kinetic energy based on the blast kinetic energy difference and conventional blast kinetic energy; determining the uniformity of the blast kinetic energy based on the ratio of low-carbon blast kinetic energy to conventional blast kinetic energy.

[0067] In this embodiment, according to the following formula (8), the kinetic energy of the blast under the low-carbon blast furnace working condition is Calculate the overall air blast uniformity ΔE, i.e. the air blast kinetic energy uniformity:

[0068]

[0069] In formula (8), ΔE represents the overall air blowing uniformity under low carbon conditions; It indicates the average blast kinetic energy under normal blast furnace conditions, unit: kJ / s; It indicates the average blast kinetic energy under low-carbon blast furnace conditions, unit: kJ / s. It can be understood that conventional conditions refer to conventional blast furnace conditions, and low-carbon conditions refer to low-carbon blast furnace conditions.

[0070] In one embodiment of the present application, the process after determining the uniformity of the blast kinetic energy of a low-carbon blast furnace under low-carbon conditions based on conventional blast kinetic energy and low-carbon blast kinetic energy also includes the following steps: comparing the uniformity of the blast kinetic energy with a preset threshold; if the uniformity of the blast kinetic energy is less than or equal to the preset threshold, it is determined that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uniform, and the low-carbon blast furnace is not adjusted; if the uniformity of the blast kinetic energy is greater than the preset threshold, it is determined that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uneven, and the second diameter of the tuyere sleeve, the surrounding pipe gas pressure or the blowing pressure of the low-carbon blast furnace are adjusted until the uniformity of the blast kinetic energy is less than or equal to the preset threshold, so that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uniform.

[0071] In this embodiment, if the uniformity of the blast kinetic energy is greater than a preset threshold value and the blast furnace is in the initial operating condition of the furnace, the second diameter of the tuyere sleeve is adjusted until the uniformity of the blast kinetic energy is less than or equal to the preset threshold value, and the adjusted second diameter of the tuyere sleeve is output; if the uniformity of the blast kinetic energy is greater than the preset threshold value and the blast furnace is in normal operating conditions, the surrounding pipe gas pressure or the injection pressure is adjusted according to the gradient method with a preset step length until the uniformity of the blast kinetic energy is less than or equal to the preset threshold value, and the adjusted blast pressure or the adjusted injection pressure is output.

[0072] In this embodiment, ε represents the preset threshold value. If |ΔE|≤ε, that is, the uniformity of the blast kinetic energy is within the normal range, the blast of the low-carbon blast furnace is determined to be uniform, and no further adjustment and optimization of the operating parameters of the low-carbon blast furnace is required; if |ΔE|>ε, that is, the threshold value exceeds the normal range, the blast of the low-carbon blast furnace is determined to be uneven, and further adjustment and optimization of the operating parameters of the low-carbon blast furnace is required; if |ΔE|>ε, that is, the uniformity of the blast kinetic energy exceeds the normal range, and the low-carbon blast furnace is in the initial stage of furnace opening, the preset diameter d of the tuyere sleeve is adjusted. 1 , cyclic calculation, until the overall blast uniformity |ΔE|≤ε, output the adjusted diameter of the tuyere sleeve; if |ΔE|>ε, that is, the blast kinetic energy uniformity exceeds the normal range, and the low-carbon blast furnace is in normal operation, adjust the surrounding pipe gas pressure, that is, the blast pressure P 0 Or injection pressure P RG , until the overall blast uniformity |ΔE|≤ε, output the adjusted blast pressure or injection pressure, reference Figure 3 As shown, Figure 3 It is a flow chart of another exemplary embodiment of the present application showing a method for determining the uniformity of kinetic energy of the blast. It is understandable that the gas injection will cause resistance loss, that is, the resistance loss ΔP of the tuyere sleeve under low-carbon working conditions. 1 Calculated from the injection pressure, it can also be understood as the resistance loss ΔP of the tuyere sleeve under low carbon conditions 1 Including injection pressure.

[0073] In this embodiment, the ε value can be set to 5% to 10%, which can be adjusted according to the actual conditions of the blast furnace. 1 When the diameter is 105, 110, 115, 125 and 130 mm, the blast pressure P 0 To P 0 ' or injection pressure P RG To P R ' G When the step length is set to 1 kPa, the gradient method is used, for example, the step length is set to 1 kPa, and the overall air blowing uniformity ΔE|≤ε is adjusted in a cyclic iterative manner. It should be noted that the diameter value and the step length of the gradient method are only examples, and can be set according to needs in actual use, and this application does not limit this.

[0074] In one embodiment of the present application, the steps in the above method are further explained through the following Example 1. It can be understood that the following Example 1 is only for illustration and does not limit the present application.

[0075] In step S101, the basic operating parameters of COG injection in a blast furnace are determined. 3 Basic operating parameters of blast furnace COG injection: number of tuyere (n) 30, tuyere diameter (d 1 )0.115m, branch pipe length (L 0 )3.3m, air volume (Q 0 )5200Nm 3 / min(oxygen enrichment 760Nm 3 / min), coke oven gas COG injection volume 7000Nm 3 / h, number of sprays: 4, air temperature (t 0 )1210℃, blast pressure (P 0 )443.7kPa. Table 1 shows the composition and content of coke oven gas:

[0076] Table 1 Composition and content of coke oven gas, %

[0077] Element <![CDATA[H 2 ]]> CO <![CDATA[CH 4 ]]> <![CDATA[CO 2 ]]> <![CDATA[H 2 The]]> <![CDATA[N 2 ]]> <![CDATA[O 2 ]]> content 63.37 6.34 21.33 1.76 0.82 6.11 0.27

[0078] Further, according to That is, formula (1) is used to calculate the resistance loss from the hot blast pipe to the front end of the tuyere sleeve under the condition of conventional blast furnace without gas injection, as shown in Table 2:

[0079] Table 2 Resistance loss from the hot blast pipe to the front end of the tuyere sleeve under conventional blast furnace conditions

[0080]

[0081] In step S102, under the condition of low carbon blast furnace, considering the gas combustion efficiency η is 20%, the diameter d of the tuyere sleeve is first preset. 1 115mm, and then according to the gas injection medium COG, gas injection amount 7000Nm 3 / h, injection pressure P RG The other parameters are consistent with those of conventional blast furnaces. The resistance loss ΔP generated by the combustion of coal gas in the tuyere sleeve is calculated. 1 ;

[0082] In step S103, according to the blast pressure P at the hot blast enclosure pipe 0 , the resistance loss from the hot air surrounding pipe to the front end of the tuyere small sleeve ΔP 0 The resistance loss ΔP caused by the combustion of coal gas at the tuyere sleeve 1 The hot air-gas pressure P of the tuyere sleeve obtained under low carbon blast furnace conditions 2 , that is, P 2 =P 0 -(ΔP 0 +ΔP 1 ). The resistance loss from the hot air surrounding pipe for spraying COG to the front end of the tuyere sleeve is obtained, as shown in Table 3:

[0083] Table 3 Resistance loss from the hot blast pipe to the front end of the tuyere sleeve under low carbon blast furnace conditions

[0084] Working conditions <![CDATA[P 0 ,kPa]]> <![CDATA[ΔP 0 ,kPa]]> <![CDATA[ΔP 1 ,kPa]]> <![CDATA[P 2 ,kPa]]> No air outlet 443.7 17.7 57.6 368.4 Blowing tuyere 443.7 17.7 82.1 343.9

[0085] In step S104, the calculation formula of the kinetic energy of the wind is The kinetic energy of the blast furnace under conventional blast furnace conditions and low-carbon blast furnace conditions is obtained. and The results are shown in Table 4. The kinetic energy of each tuyere under low carbon blast furnace conditions is as follows: Figure 4a As shown, Figure 4a It is a schematic diagram of the blast kinetic energy of each tuyere under low-carbon blast furnace conditions, shown as an exemplary embodiment of the present application.

[0086] Table 4 Blast kinetic energy parameters of conventional blast furnace and low carbon blast furnace without regulation

[0087]

[0088] In step S105, the kinetic energy of the blast in the low-carbon blast furnace is calculated according to the following formula: Calculate the overall air blowing uniformity ΔE,

[0089] In step S106, the overall blast uniformity is compared with the preset normal range. Taking the preset normal range of 5% to 10% as an example, if |ΔE|=11.05%>ε, the overall blast uniformity exceeds the normal range, and it is determined that the blast of the low-carbon blast furnace operating condition is uneven, and further adjustment and optimization parameters are required;

[0090] In step S107, if |ΔE|>ε, the overall blast uniformity exceeds the normal range, and the low-carbon blast furnace is in the initial stage of furnace start-up, the preset tuyere sleeve diameter d is adjusted. 1 , cyclic calculation, until the overall blast uniformity |ΔE|≤ε, output the adjusted parameters, where the adjusted parameters include the diameter of the tuyere sleeve. The adjusted parameters are shown in Table 5. When the diameter of the tuyere for injecting coal gas is adjusted to 130mm, ΔE|=0.79%≤ε, meeting the output requirements. The blast kinetic energy of each tuyere under the working condition of low-carbon blast furnace after adjustment is as follows Figure 4b As shown, Figure 4b It is a schematic diagram of the blast kinetic energy of each tuyere under the first adjusted low-carbon blast furnace operating condition shown in an exemplary embodiment of the present application.

[0091] Table 5 Blast kinetic energy parameters of conventional blast furnace and low carbon blast furnace without regulation (diameter of small sleeve of air regulating port)

[0092]

[0093] If |ΔE|>ε, the overall blast uniformity exceeds the normal range, and the low-carbon blast furnace is in normal operation, adjust the blast pressure P 0 To P 0 ' or injection pressure P RG To P R ' G , until the overall blast uniformity ΔE|≤ε, and then output the adjusted parameters. The adjusted parameters are shown in Table 6. When the blast pressure is adjusted from 443.7kPa to 450kPa and the number of tuyere is adjusted from 4 to 6, |ΔE|=1.00%≤ε, which meets the output requirements. The blast kinetic energy of each tuyere under the low-carbon blast furnace working condition after adjustment is as follows Figure 4c As shown, Figure 4c It is a schematic diagram of the blast kinetic energy of each tuyere under the second adjusted low-carbon blast furnace operating condition shown in an exemplary embodiment of the present application.

[0094] Table 6 Blast kinetic energy parameters of conventional blast furnace and low carbon blast furnace without regulation (adjusting blast pressure)

[0095]

[0096] The results show that when the gas medium injected into the low-carbon blast furnace is COG, the injected gas burns with the oxygen in the hot air in the tuyere sleeve, resulting in volume expansion, which will produce greater resistance locally. The balance of the air supply system of the low-carbon blast furnace can be achieved by adjusting the lower parameters, such as adjusting the diameter of the tuyere sleeve or adjusting the blast pressure.

[0097] In one embodiment of the present application, the steps in the above method are further explained through the following Example 2. It can be understood that the following Example 2 is only for illustration and does not limit the present application.

[0098] In step S201, determine the blast furnace injection H 2 The following are the basic operating parameters of a 2300m 3 Blast furnace injection H 2 Basic operating parameters: number of tuyere (n) 30, tuyere diameter (d 1 )0.115m, branch pipe length (L 0 )3.3m, air volume (Q 0 )5200Nm 3 / min(oxygen enrichment 760Nm 3 / min), H 2 Injection volume (Q RG0 ) is 6500Nm 3 / h, number of sprays: 4, air temperature (t 0 )1210℃, blast pressure (P 0 )443.7kPa.

[0099] Further, according to That is, formula (1) is used to calculate the resistance loss from the hot blast pipe to the front end of the tuyere sleeve under the condition of conventional blast furnace without gas injection, as shown in Table 7:

[0100] Table 7 Resistance loss from the hot blast pipe to the front end of the tuyere sleeve under conventional blast furnace conditions

[0101]

[0102] In step S202, under the condition of low carbon blast furnace, considering the gas combustion efficiency η is 25%, the diameter d of the tuyere sleeve is first preset. 1 is 115mm, and then according to the gas injection medium H 2 , Gas injection volume 6500Nm 3 / h, injection pressure P RG The other parameters are consistent with those of conventional blast furnaces. The resistance loss ΔP generated by the combustion of coal gas in the tuyere sleeve is calculated. 1 ;

[0103] In step S203, according to the blast pressure P at the hot blast enclosure pipe 0 , the resistance loss from the hot air surrounding pipe to the front end of the tuyere small sleeve ΔP 0 The resistance loss ΔP caused by the combustion of coal gas at the tuyere sleeve 1 The hot air-gas pressure P of the tuyere sleeve obtained under low carbon blast furnace conditions 2 , that is, P 2 =P 0 -(ΔP 0 +ΔP 1 ). Get the spray H 2 The resistance loss from the hot air surrounding pipe to the front end of the tuyere small sleeve is shown in Table 8;

[0104] Table 8 Resistance loss from hot blast pipe to front end of tuyere sleeve under low carbon blast furnace working condition

[0105] Working conditions <![CDATA[P 0 ,kPa]]> <![CDATA[ΔP 0 ,kPa]]> <![CDATA[ΔP 1 ,kPa]]> <![CDATA[P 2 ,kPa]]> No air outlet 443.7 17.7 57.6 368.4 Blowing tuyere 443.7 17.7 80.6 345.4

[0106] In step S204, the calculation formula of the kinetic energy of the wind is The kinetic energy of the blast furnace under conventional blast furnace conditions and low-carbon blast furnace conditions is obtained. and The results are shown in Table 9. The kinetic energy of each tuyere under low carbon blast furnace conditions is as follows: Figure 4d As shown, Figure 4d It is a schematic diagram of the blast kinetic energy of each tuyere under low-carbon blast furnace conditions, shown in another exemplary embodiment of the present application.

[0107] Table 9 Blast kinetic energy parameters of conventional blast furnace and low carbon blast furnace without regulation

[0108]

[0109] In step S205, the kinetic energy of the blast in the low-carbon blast furnace is calculated according to the following formula: Calculate the overall air blowing uniformity ΔE,

[0110] In step S206, the overall blast uniformity is compared with the preset normal range. Taking the preset normal range of 5% to 10% as an example, if |ΔE|=10.71%>ε, the overall blast uniformity exceeds the normal range, and it is determined that the blast of the low-carbon blast furnace operating condition is uneven, and further adjustment and optimization parameters are required;

[0111] In step S207, if |ΔE|>ε, the overall blast uniformity exceeds the normal range, and the low-carbon blast furnace is in the initial stage of furnace start-up, the preset tuyere small sleeve diameter d is adjusted. 1, cyclic calculation, until the overall blast uniformity |ΔE|≤ε, output the adjusted parameters, the adjusted parameters include the diameter of the tuyere sleeve. The adjusted parameters are shown in Table 10. When the diameter of the tuyere for gas injection is adjusted to 130mm, ΔE|=0.61%≤ε, meeting the output requirements. The blast kinetic energy of each tuyere under the working condition of low-carbon blast furnace after adjustment is as follows Figure 4e As shown, Figure 4e It is a schematic diagram of the blast kinetic energy of each tuyere under the first adjusted low-carbon blast furnace operating condition shown in another exemplary embodiment of the present application.

[0112] Table 10 Blast kinetic energy parameters of conventional blast furnace and low carbon blast furnace without regulation (diameter of small sleeve of air regulating port)

[0113]

[0114] If |ΔE|>ε, the overall blast uniformity exceeds the normal range, and the low-carbon blast furnace is in normal operation, adjust the blast pressure P 0 To P 0 ' or injection pressure P RG To P R ' G , until the overall blast uniformity ΔE|≤ε, output the adjusted parameters, the adjusted parameters include blast pressure or injection pressure. The adjusted parameters are shown in Table 11. Adjust the blast pressure P 0 ′ is 450kPa, the number of tuyere is adjusted from 4 to 6 and the diameter of the tuyere is adjusted to 125mm, |ΔE|=1.89%≤ε, which meets the output requirements. The blast kinetic energy of each tuyere under the low-carbon blast furnace working condition after adjustment is as follows Figure 4f As shown, Figure 4f It is a schematic diagram of the blast kinetic energy of each tuyere under the second adjusted low-carbon blast furnace operating condition shown in another exemplary embodiment of the present application.

[0115] Table 11 Blast kinetic energy parameters of conventional blast furnace and low carbon blast furnace without regulation (adjusting blast pressure)

[0116]

[0117] The results show that when the low carbon blast furnace gas injection medium is H 2 When the injected coal gas burns with the oxygen in the hot air in the tuyere sleeve, the volume expands, and a large resistance is generated locally. The balance of the air supply system of the low-carbon blast furnace can be achieved by adjusting the lower parameters, such as adjusting the diameter of the tuyere sleeve or adjusting the blast pressure.

[0118] The present application is applicable to the kinetic energy regulation of blast furnace gas flow under hydrogen-rich smelting conditions, and can ensure the balance and stability of the air supply system under blast furnace low-carbon smelting conditions. The present application calculates the resistance loss from the hot blast pipe to the front end of the tuyere sleeve, and calculates the resistance loss change of the hot blast-gas in the tuyere sleeve under the working conditions of the low-carbon blast furnace in combination with the combustion efficiency of different injected coal gases, so as to correct the blast kinetic energy under different injection states; by comparing the blast kinetic energy under the working conditions of the conventional blast furnace and the low-carbon blast furnace, the uniformity of the air supply parameters in the lower part of the blast furnace is determined, and the parameters are adjusted and optimized as needed, and further includes specific formulas for calculating the resistance loss, the combustion efficiency of the coal gas and the blast kinetic energy, as well as the adjustment steps of the tuyere sleeve diameter, the blast pressure or the injection pressure under different working conditions. Through these steps, the uniformity of the blast and the injected coal gas of the low-carbon blast furnace can be effectively controlled, the production efficiency can be improved, and the stable and smooth operation of the blast furnace can be ensured, and it has broad industrial application prospects in the field of low-carbon blast furnaces; by optimizing the design of the tuyere sleeve and combining the pressure regulating system, the local airflow resistance change caused by the combustion of hydrogen-rich coal gas is significantly improved, the balanced distribution of the blast kinetic energy is ensured, and the smelting efficiency of the blast furnace is improved. The present invention implements different operations according to different furnace conditions, so that the regulation is simple and easy, the operability is strong, and the invention has universality.

[0119] Figure 5 is a block diagram of a device for determining the uniformity of kinetic energy of a blast according to an exemplary embodiment of the present application. The device can be applied to Figure 1 The implementation environment shown in the figure is specifically configured in the computer device 102. The device can also be applied to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the device is applied.

[0120] like Figure 5 As shown, the exemplary device for determining the uniformity of kinetic energy of air blowing includes: an acquisition module 510 , a calculation module 520 and a determination module 530 .

[0121] Among them, the acquisition module 510 is used to obtain the blast furnace operation index, so as to obtain the blast furnace operation parameters corresponding to the front end of the tuyere sleeve and the tuyere sleeve respectively according to the blast furnace operation index, wherein the hot air enters the low-carbon blast furnace through the front end of the tuyere sleeve and the tuyere sleeve in turn, and the blast furnace operation index includes tuyere size, gas density and gas velocity; the calculation module 520 is used to calculate according to the blast furnace operation parameters corresponding to the front end of the tuyere sleeve, obtain the front end gas pressure corresponding to the front end of the tuyere sleeve, and calculate the front end gas pressure according to the blast furnace operation parameters corresponding to the tuyere sleeve, and obtain the internal gas pressure corresponding to the tuyere sleeve; the determination module 530 is used to determine the conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions according to the front end gas pressure, and determine the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the internal gas pressure, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy.

[0122] It should be noted that the device for determining the uniformity of kinetic energy of the blast provided in the above embodiment and the method for determining the uniformity of kinetic energy of the blast provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment, and will not be repeated here. In practical applications, the device for determining the uniformity of kinetic energy of the blast provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0123] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, when the one or more programs are executed by one or more processors, the electronic device implements the method for determining the uniformity of the kinetic energy of the blowing provided in the above-mentioned embodiments.

[0124] Figure 6 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 6 The computer system 600 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.

[0125] like Figure 6As shown, the computer system 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage part 608 to the random access memory (RAM) 603, such as executing the methods provided in the above-mentioned various embodiments. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, the ROM 602 and the RAM 603 are connected to each other through the bus 604. The input / output (I / O) interface 605 is also connected to the bus 604.

[0126] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed so that a computer program read therefrom is installed into the storage section 608 as needed.

[0127] 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 609, and / or installed from a removable medium 611. When the computer program is executed by a central processing unit (CPU) 601, various functions defined in the system of the present application are executed.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] Another aspect of the present application further 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 method for determining the uniformity of kinetic energy of the blast provided in the above-mentioned embodiments. The computer-readable storage medium may be included in the electronic device described in the above-mentioned embodiments, or may exist independently without being assembled into the electronic device.

[0132] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0133] 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 method for determining the uniformity of kinetic energy of the blast provided in each of the above embodiments.

[0134] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0135] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0136] 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 determining the uniformity of kinetic energy of air blast, characterized in that: include: Acquire a blast furnace operation index, so as to acquire blast furnace operation parameters corresponding to the front end of the tuyere sleeve and the tuyere sleeve respectively according to the blast furnace operation index, wherein hot blast sequentially enters the low-carbon blast furnace through the front end of the tuyere sleeve and the tuyere sleeve, and the blast furnace operation index includes tuyere size, gas density and gas velocity; Calculate the front gas pressure corresponding to the front end of the tuyere sleeve according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve, and calculate the front gas pressure according to the blast furnace operating parameters corresponding to the tuyere sleeve to obtain the internal gas pressure corresponding to the tuyere sleeve; The conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions is determined according to the front-end gas pressure, and the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions is determined according to the internal gas pressure, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy.

2. The method for determining the uniformity of kinetic energy of air blowing according to claim 1, characterized in that: The front end gas pressure corresponding to the front end of the tuyere sleeve is obtained by calculating according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve, including: Obtain the surrounding pipe gas pressure corresponding to the hot air surrounding pipe; Calculating according to a first length, a first diameter, a first gas density and a first gas velocity of a front end of the tuyere sleeve to obtain a first along-the-way pressure loss at the front end of the tuyere sleeve, and calculating according to the first gas density and the first gas velocity to obtain a first local pressure loss at the front end of the tuyere sleeve, wherein the blast furnace operating parameters corresponding to the front end of the tuyere sleeve include the first length, the first diameter, the first gas density and the first gas velocity; Calculate the first pressure difference from the hot blast surrounding pipe to the front end of the tuyere small sleeve according to the first along-the-way pressure loss and the first local pressure loss; The front end gas pressure is obtained by performing calculation based on the surrounding pipe gas pressure and the first pressure difference.

3. The method for determining the uniformity of kinetic energy of air blowing according to claim 2, characterized in that: Determining the conventional blast kinetic energy of the low-carbon blast furnace under conventional working conditions according to the front-end gas pressure includes: Obtaining the first gas volume and the first gas temperature at the front end of the tuyere sleeve; Calculating based on the first gas density, the first gas volume, the first gas temperature, the number of tuyere and the front-end gas pressure to obtain the first gas mass per unit time of a single tuyere; The conventional blast kinetic energy is obtained by calculation according to the first gas mass and the first gas velocity.

4. The method for determining the uniformity of kinetic energy of air blowing according to claim 1, characterized in that: The front end gas pressure is calculated according to the blast furnace operating parameters corresponding to the tuyere sleeve to obtain the internal gas pressure corresponding to the tuyere sleeve, including: Calculating according to the second length, the second diameter, the second gas density and the second gas velocity of the tuyere sleeve to obtain the second along-the-way pressure loss of the tuyere sleeve, and calculating according to the second gas density and the second gas velocity to obtain the second local pressure loss of the tuyere sleeve, wherein the blast furnace operating parameters corresponding to the tuyere sleeve include the second length, the second diameter, the second gas density and the second gas velocity; Calculating according to the second along-the-way pressure loss and the second local pressure loss, obtaining a second pressure difference generated by the combustion of the gas in the tuyere sleeve; The internal gas pressure is obtained by calculation based on the second pressure difference and the front end gas pressure.

5. The method for determining the uniformity of kinetic energy of air blowing according to claim 4, characterized in that: Determining the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon working conditions according to the internal gas pressure includes: Obtain the second gas volume and second gas temperature of the tuyere sleeve; Calculating based on the second gas density, the second gas volume, the second gas temperature, the number of tuyere and the internal gas pressure, to obtain the second gas mass per unit time of a single tuyere; The low-carbon blast kinetic energy is obtained by calculating according to the second gas mass and the second gas velocity.

6. The method for determining the uniformity of kinetic energy of air blowing according to any one of claims 1 to 5, characterized in that: The uniformity of the kinetic energy of the blast is determined by any one of the following methods: Calculate the conventional blast kinetic energy and the low-carbon blast kinetic energy to obtain a blast kinetic energy difference, and calculate the blast kinetic energy uniformity based on the blast kinetic energy difference and the conventional blast kinetic energy; The uniformity of the blast kinetic energy is determined according to the ratio of the low-carbon blast kinetic energy to the conventional blast kinetic energy.

7. The method for determining the uniformity of kinetic energy of air blowing according to any one of claims 1 to 5, characterized in that: After determining the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon working conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy, the method further comprises: Comparing the uniformity of the kinetic energy of the air blast with a preset threshold; If the blast kinetic energy uniformity is less than or equal to the preset threshold, it is determined that the blast kinetic energy distribution of the low-carbon blast furnace under the low-carbon working condition is uniform, and the low-carbon blast furnace is not regulated; If the uniformity of the blast kinetic energy is greater than the preset threshold, it is determined that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uneven, and the second diameter of the tuyere sleeve, the surrounding pipe gas pressure or the blowing pressure of the low-carbon blast furnace are adjusted until the uniformity of the blast kinetic energy is less than or equal to the preset threshold, so that the blast kinetic energy distribution of the low-carbon blast furnace under low-carbon conditions is uniform.

8. A device for determining the uniformity of kinetic energy of air blast, characterized in that: include: An acquisition module is used to acquire a blast furnace operation index, so as to acquire blast furnace operation parameters corresponding to the front end of the tuyere sleeve and the tuyere sleeve respectively according to the blast furnace operation index, wherein hot air sequentially enters the low-carbon blast furnace through the front end of the tuyere sleeve and the tuyere sleeve, and the blast furnace operation index includes tuyere size, gas density and gas velocity; A calculation module, used for calculating according to the blast furnace operating parameters corresponding to the front end of the tuyere sleeve, obtaining the front end gas pressure corresponding to the front end of the tuyere sleeve, and calculating the front end gas pressure according to the blast furnace operating parameters corresponding to the tuyere sleeve, obtaining the internal gas pressure corresponding to the tuyere sleeve; A determination module is used to determine the conventional blast kinetic energy of the low-carbon blast furnace under conventional operating conditions according to the front-end gas pressure, and to determine the low-carbon blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the internal gas pressure, so as to determine the uniformity of the blast kinetic energy of the low-carbon blast furnace under low-carbon operating conditions according to the conventional blast kinetic energy and the low-carbon blast kinetic energy.

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 method for determining the uniformity of the kinetic energy of the air blowing as described in any one of claims 1 to 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 method for determining the uniformity of kinetic energy of the blowing air according to any one of claims 1 to 7.

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