Adjusting method, device and equipment of blast furnace and medium

Abstract

The invention discloses a blast furnace adjusting method, device and equipment and a medium, and belongs to the technical field of metallurgy. The method comprises the following steps: acquiring bosh gas volume, hot air pressure, furnace top pressure, ascending pipe temperature of the furnace top, static pressure of a furnace body and furnace throat temperature of the blast furnace; determining the air permeability index of the blast furnace according to the bosh gas amount, the hot air pressure, the furnace top pressure and the static pressure; according to the air permeability index, the ascending pipe temperature or the furnace throat temperature, whether the pipeline stroke occurs in the blast furnace or not is judged; and if the pipeline stroke occurs, adjusting the blast furnace according to a preset adjusting measure so as to eliminate the pipeline stroke. According to the method, whether the pipeline stroke occurs in the blast furnace or not is judged more accurately according to the air permeability index, the ascending pipe temperature and the furnace throat temperature, if the pipeline stroke occurs, adjustment measures are adopted for adjustment, the pipeline stroke is eliminated in time, and the production efficiency of the blast furnace is improved.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and in particular to a blast furnace adjustment method, device, equipment and medium. Background Art

[0002] The blast furnace is the most important reactor in the modern ironmaking industry. Currently, about 90% of China's molten iron is produced by blast furnaces. The blast furnace is a high-temperature and high-pressure closed reactor. Iron ore, coke and other furnace materials are added from the top of the blast furnace, and high-pressure hot air and auxiliary fuel are blown in from the lower tuyere of the blast furnace. The high-temperature coal gas generated by the combustion of the fuel in the tuyere area flows in the opposite direction to the descending furnace materials, resulting in complex physical and chemical changes and heat transfer, thereby achieving the reduction and separation of iron elements. From top to bottom, there are block belts, soft melting belts, dripping belts, combustion belts and slag iron accumulation belts inside the blast furnace. When the state of each belt is unstable, it will cause fluctuations or abnormalities in the blast furnace state, for example, causing pipeline travel.

[0003] In the related art, whether pipeline travel occurs is determined by the change in the static pressure difference of the blast furnace body. If pipeline travel occurs, effective measures are taken to eliminate the pipeline travel and restore the blast furnace to a normal state.

[0004] However, this judgment method only considers the static pressure difference, and when the static pressure difference is normal, pipeline stroke may also occur. Therefore, the above judgment method cannot accurately determine whether pipeline stroke occurs, resulting in the inability to eliminate pipeline stroke defects in time, affecting the production efficiency of the blast furnace. Summary of the invention

[0005] In view of the above problems, the present invention is proposed to provide a blast furnace adjustment method, device, equipment and medium that solve the above problems. It can more accurately judge whether pipeline stroke occurs in the blast furnace based on the permeability index, riser temperature and throat temperature. If pipeline stroke occurs, adjustment measures are adopted to adjust it, so as to eliminate pipeline stroke in time and improve the production efficiency of the blast furnace.

[0006] In a first aspect, the present invention provides a method for regulating a blast furnace, the method comprising:

[0007] Obtain the amount of gas in the bosh, hot blast pressure, furnace top pressure, temperature of the riser pipe at the furnace top, static pressure of the furnace body and furnace throat temperature of the blast furnace;

[0008] Determining the permeability index of the blast furnace according to the amount of bosh gas, the hot blast pressure, the furnace top pressure and the static pressure;

[0009] judging whether a pipe stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature;

[0010] If the pipeline stroke occurs, the blast furnace is adjusted according to preset adjustment measures to eliminate the pipeline stroke.

[0011] Optionally, judging whether a pipe stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature includes:

[0012] Obtaining the cold air flow rate of the blast furnace;

[0013] If the cold air flow rate is greater than or equal to the preset cold air flow rate threshold, the index difference between the air permeability index at the current moment and the air permeability index at the previous moment, and the temperature difference between the furnace throat temperature at the current moment and the furnace throat temperature at the previous moment are calculated;

[0014] If the index difference is less than a preset index difference threshold, or the temperature difference is greater than a preset temperature difference threshold, it is determined that the blast furnace has an edge pipe stroke;

[0015] Among them, the index difference threshold is less than 0, and the temperature difference threshold is greater than 0.

[0016] Optionally, judging whether a pipe stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature includes:

[0017] Calculate the average, range and maximum values ​​of the temperatures of multiple risers;

[0018] If the average value is greater than a preset average value threshold, or the maximum value is greater than a preset maximum value threshold, it is determined that a central pipe stroke occurs in the blast furnace;

[0019] If the extreme difference value is greater than a preset extreme difference threshold, it is determined that a marginal pipe stroke occurs in the blast furnace.

[0020] Optionally, if the pipeline stroke occurs, adjusting the blast furnace according to a preset adjustment measure to eliminate the pipeline stroke includes:

[0021] If the pipeline trip occurs within the set first interval time, the occurrence frequency of the pipeline trip is increased by one;

[0022] If the occurrence frequency is greater than or equal to a preset frequency threshold within the set second interval, the blast furnace is adjusted according to a preset adjustment measure to eliminate the pipeline stroke;

[0023] The second interval time is greater than the first interval time.

[0024] Optionally, the interior of the blast furnace includes areas at different heights, the static pressure includes the static pressures at the different heights, and determining the permeability index of the blast furnace according to the bosh gas volume, the hot blast pressure, the furnace top pressure and the static pressure includes:

[0025] Calculating the pressure difference in each area according to the hot blast pressure, the furnace top pressure and the static pressure at different heights;

[0026] If the pressure difference is greater than 0, the number of regions at the same height is obtained, and a first ratio of the amount of furnace gas to the number is calculated;

[0027] The first ratio and a second ratio of the pressure difference in each area at a corresponding height are calculated to obtain a permeability index of each area in the blast furnace where the pressure difference is greater than 0.

[0028] Optionally, calculating the pressure difference of each area according to the hot blast pressure, the furnace top pressure and the static pressure of the different areas includes:

[0029] Determining the upper pressure and the lower pressure of each area according to the hot blast pressure, the furnace top pressure and the static pressure of the different areas;

[0030] The difference between the lower pressure and the upper pressure is calculated to obtain the pressure difference of each area.

[0031] Optionally, if the index difference is less than a preset index difference threshold, or the temperature difference is greater than a preset temperature difference threshold, it is determined that the blast furnace has an edge pipe stroke, including:

[0032] An area where the index difference is less than the index difference threshold is determined as an abnormal area, and it is determined that the edge pipe stroke occurs in the abnormal area in the blast furnace.

[0033] In a second aspect, the present invention provides a blast furnace adjustment method device, the device comprising:

[0034] An acquisition module is used to obtain the amount of bosh gas, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace;

[0035] A determination module, used to determine the permeability index of the blast furnace according to the amount of bosh gas, the hot blast pressure, the furnace top pressure and the static pressure;

[0036] A judgment module, used for judging whether a pipeline stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature;

[0037] The regulating module is used for regulating the blast furnace according to preset regulating measures if the pipeline stroke occurs, so as to eliminate the pipeline stroke.

[0038] In a third aspect, the present invention provides an electronic device comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method described in the first aspect by executing the computer instructions.

[0039] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0040] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:

[0041] The embodiment of the present invention provides a blast furnace adjustment method, device, equipment and medium, obtains the furnace bosh gas volume, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace, and obtains parameters affecting the stability of the blast furnace; according to the furnace bosh gas volume, hot blast pressure, furnace top pressure and static pressure, the permeability index of the blast furnace is determined to understand the ability of the blast furnace to accept air volume; according to the permeability index, riser temperature or furnace throat temperature, it is judged whether the blast furnace has a pipeline stroke, and multiple parameters are considered to make the judgment more accurate; if a pipeline stroke occurs, the blast furnace is adjusted according to the preset adjustment measures to eliminate the pipeline stroke and improve the production efficiency of the blast furnace. According to the permeability index, riser temperature and furnace throat temperature, the method can more accurately judge whether the blast furnace has a pipeline stroke, and if a pipeline stroke occurs, the adjustment measures are used to adjust it, so as to eliminate the pipeline stroke in time and improve the production efficiency of the blast furnace.

[0042] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 is a flow chart of a blast furnace adjustment method provided by an embodiment of the present invention;

[0045] Figure 2 It is a structural block diagram of a blast furnace regulating device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present application clearer, the implementation mode of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0047] Before a detailed introduction to a blast furnace adjustment method provided in an embodiment of the present invention, a brief introduction to the application scenarios involved is first given.

[0048] The blast furnace is the most important reactor in the modern ironmaking industry. Currently, about 90% of China's molten iron is produced by blast furnaces. The blast furnace is a high-temperature and high-pressure closed reactor. Iron ore, coke and other furnace materials are added from the top of the blast furnace, and high-pressure hot air and auxiliary fuel are blown in from the lower tuyere of the blast furnace. The high-temperature coal gas generated by the combustion of the fuel in the tuyere area flows in the opposite direction to the descending furnace materials, resulting in complex physical and chemical changes and heat transfer, thereby achieving the reduction and separation of iron elements. From top to bottom, there are block belts, soft melting belts, dripping belts, combustion belts and slag iron accumulation belts inside the blast furnace. When the state of each belt is unstable, it will cause fluctuations or abnormalities in the blast furnace state, for example, causing pipeline travel.

[0049] The pipe travel inside the blast furnace is an abnormal production state of the blast furnace. It is an abnormal phenomenon of excessive local airflow development in the horizontal interface direction of the blast furnace. The pipe travel of the blast furnace is generally caused by the deterioration of raw fuel quality, mismatch of air volume and pressure difference, unreasonable material distribution system, etc. The pipe travel is often accompanied by abnormal phenomena such as blast furnace slippage and deviation. In severe cases, it leads to suspended material in the blast furnace, resulting in serious production and energy losses.

[0050] In the related art, whether pipeline travel occurs is determined by the change in the static pressure difference of the blast furnace body. If pipeline travel occurs, effective measures are taken to eliminate the pipeline travel and restore the blast furnace to a normal state.

[0051] However, this judgment method only considers the static pressure difference, and when the static pressure difference is normal, pipeline stroke may also occur. Therefore, the above judgment method cannot accurately determine whether pipeline stroke occurs, resulting in the inability to eliminate pipeline stroke defects in time, affecting the production efficiency of the blast furnace.

[0052] In order to solve the above problems, an embodiment of the present invention provides a blast furnace adjustment method, which can more accurately determine whether pipeline stroke occurs in the blast furnace according to the permeability index, riser temperature and throat temperature. If pipeline stroke occurs, adjustment measures are adopted to eliminate pipeline stroke in time and improve the production efficiency of the blast furnace.

[0053] Next, the blast furnace adjustment method provided by the embodiment of the present invention is described in detail with reference to the accompanying drawings.

[0054] Figure 1 is a flow chart of a blast furnace adjustment method provided by an embodiment of the present invention, such as Figure 1 As shown, the method includes:

[0055] Step S110, obtaining the amount of bosh gas, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace.

[0056] In this embodiment, the amount of gas in the furnace of the blast furnace is collected by sampling; the hot blast pressure, furnace top pressure and furnace body static pressure are collected by pressure sensors; the riser temperature and furnace throat temperature of the furnace top are collected by temperature sensors. Among them, the cold air flow rate can be collected by flowmeter. The collected data will be stored in the blast furnace database, and can be directly obtained from the blast furnace database when needed, and then the obtained data will be stored in the pre-built data table.

[0057] Among them, the top of the blast furnace generally has multiple riser tubes, so the temperature of each riser tube is detected to obtain multiple riser tube temperatures. 3 The first-stage blast furnace has four riser tubes, and there are four riser tube temperatures, so the four riser tube temperatures are recorded in the data table, as shown in Table 1:

[0058] Table 1

[0059]

[0060]

[0061] Among them, bgv represents the amount of gas in the furnace, bp represents the hot air pressure, dp represents the furnace top pressure, tt1 to tt4 represent the furnace top riser temperature, and bv represents the cold air flow rate.

[0062] In this embodiment, the amount of bosh gas, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace can be obtained once every set time. For example, the amount of bosh gas, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace can be obtained once every 1 second, so that whether the operation status of the blast furnace is abnormal can be discovered more timely.

[0063] Step S120, determining the permeability index of the blast furnace according to the amount of gas in the furnace, the hot blast pressure, the furnace top pressure and the static pressure.

[0064] In this embodiment, the permeability index of the blast furnace can reflect the ability of the blast furnace to accept air volume. When determining the permeability index, in addition to considering the furnace gas volume, hot air pressure, and furnace top pressure, the static pressure must also be considered, so that the permeability index can better reflect the actual situation of the blast furnace.

[0065] Step S130: judging whether a pipe stroke occurs in the blast furnace according to the air permeability index, the riser temperature or the furnace throat temperature.

[0066] In this embodiment, the permeability index, riser temperature and throat temperature can all reflect the operation of the blast furnace. When the permeability index, riser temperature or throat temperature enters a certain state, it may indicate that a pipeline stroke occurs in the blast furnace.

[0067] Step S140: If pipeline travel occurs, the blast furnace is adjusted according to preset adjustment measures to eliminate the pipeline travel.

[0068] In this embodiment, if pipeline travel occurs, it means that the operation of the blast furnace has become unstable and needs to be adjusted in time to avoid seriously affecting the operating efficiency of the blast furnace. Among them, the adjustment measures may include reducing wind and adjusting the material distribution system.

[0069] Optionally, step S120 includes:

[0070] The first step is to calculate the pressure difference in each area based on the hot air pressure, furnace top pressure and static pressure at different heights.

[0071] In this embodiment, the interior of the blast furnace includes areas at different heights, and the static pressure includes static pressures at different heights.

[0072] It can be understood that the interior of the blast furnace can be divided into multiple areas. The lower surfaces of some areas are on the same horizontal plane at a certain height. These areas are recorded as areas at the same height, while the areas whose lower surfaces are on different horizontal planes are recorded as areas at different heights. Then the pressure difference of each area is calculated.

[0073] For example, the blast furnace body is divided into m sections through m-1 planes of different heights and parallel to the bottom of the blast furnace, that is, the blast furnace body is divided into m sections in the height direction of the blast furnace, and n pressure measuring points are arranged in the circumferential direction of each plane, and the n pressure measuring points can be evenly distributed in the circumferential direction. Then each section is divided into n areas, each area includes a pressure measuring point, and the n areas on the same section are areas of the same height, while the areas on different sections are areas of different heights. The number of areas on each section is the same and corresponds one to one. The static pressure of each pressure measuring point is collected by a pressure sensor, and the static pressure of each pressure measuring point is used as the static pressure at the corresponding height, and can also be recorded as the static pressure of the corresponding area. Finally, n*(m-1) static pressures can be obtained, and then combined with the furnace top pressure and the hot air pressure, the pressure difference of each area is calculated.

[0074] Exemplarily, the furnace body is divided into 4 sections by 3 planes, 6 pressure measuring points are arranged in the circumferential direction of each plane, each section includes 6 areas, and the 18 static pressures detected are shown in Table 2:

[0075] Table 2

[0076] <![CDATA[p1]]> <![CDATA[p2]]> <![CDATA[p3]]> <![CDATA[p4]]> <![CDATA[p5]]> <![CDATA[p6]]> <![CDATA[p7]]> <![CDATA[p8]]> <![CDATA[p9]]> 0.277 0.274 0.281 0.281 0.278 0.277 0.305 0.304 0.309 <![CDATA[p 10 ]]> <![CDATA[p 11 ]]> <![CDATA[p 12 ]]> <![CDATA[p 13 ]]> <![CDATA[p 14 ]]> <![CDATA[p 15 ]]> <![CDATA[p 16 ]]> <![CDATA[p 17 ]]> <![CDATA[p 18 ]]> 0.311 0.306 0.305 0.356 0.351 0.358 0.359 0.358 0.358

[0077] The heights of the three interfaces are recorded as the first height, the second height, and the third height from bottom to top, p1 to p6 represent the static pressure at the third height, and p7 to p 12 represents the static pressure at the second height, p 13 to p 18 Represents the static pressure at the first altitude.

[0078] Optionally, the first step includes:

[0079] According to the hot blast pressure, furnace top pressure and static pressure in different areas, the upper pressure and lower pressure of each area are determined; the difference between the lower pressure and the upper pressure is calculated to obtain the pressure difference of each area.

[0080] The upper pressure of each area is the pressure at the position of each area closest to the furnace top, and the lower pressure of each area is the pressure at the position of each area closest to the furnace bottom.

[0081] Specifically, the difference between each static pressure at the maximum height and the furnace top pressure is calculated to obtain the pressure difference of each area at the maximum height. The difference between the hot blast pressure and each static pressure at the minimum height is calculated to obtain the pressure difference of each area at the minimum height. The difference between the two corresponding static pressures at any two adjacent heights is calculated to obtain the pressure difference of each area at other heights, where other heights are the heights excluding the maximum height and the minimum height.

[0082] In this embodiment, the area on the highest section is the area at the maximum height, and the upper pressure of the area at the maximum height is the furnace top pressure, and the lower pressure is the static pressure at the maximum height, so the pressure difference of each area at the maximum height is obtained by calculating the difference between each static pressure at the maximum height and the furnace top pressure. Similarly, the area on the lowest section is the area at the minimum height, and the lower pressure of the area at the minimum height is the hot air pressure, and the upper pressure is the static pressure at the minimum height, so the pressure difference of each area at the minimum height is obtained by calculating the difference between the hot air pressure and each static pressure at the minimum height. The upper pressure of the area at a certain height in other sections is the static pressure of the adjacent and higher height, and the lower pressure is the static pressure at the height, so the static pressure corresponding to the lower part of each area is calculated minus the static pressure corresponding to the upper part to obtain the pressure difference of each area at the height, thereby obtaining the pressure difference of each area at all heights. This method can divide the pressure difference more finely, so that the pipeline travel of each area can be judged according to the pressure difference of each area.

[0083] For example, according to the furnace top pressure and hot blast pressure, and 18 static pressures at three heights, the data table of the pressure difference in each area is calculated as shown in Table 3:

[0084] Table 3

[0085]

[0086]

[0087] Among them, pd1 to pd6 represent the pressure difference of the six areas between the maximum height pressure measuring point and the furnace top, pd7 to pd 12 Indicates the pressure difference between the six areas between the pressure measuring point at the middle height and the pressure measuring point at the maximum height, pd 13 to pd 18 Indicates the pressure difference of the six areas between the pressure measuring point at the minimum height and the pressure measuring point at the middle height, pd 19 to pd 24 Indicates the pressure difference of the six areas between the blast furnace tuyere and the pressure measuring point at the middle height.

[0088] Step 2: If the pressure difference is greater than 0, the number of areas at the same height is obtained, and a first ratio of the amount of furnace gas to the number is calculated.

[0089] In this embodiment, the bosh gas volume is the total gas volume in the bosh of the blast furnace. In this embodiment, the blast furnace has been divided into multiple areas. The first ratio of the bosh gas volume to the number of areas at the same height is calculated to obtain the bosh gas volume of each area at the same height.

[0090] The third step is to calculate the first ratio and the second ratio of the pressure difference in each area at the corresponding height, and obtain the permeability index of each area in the blast furnace where the pressure difference is greater than 0.

[0091] In this embodiment, the first ratio is calculated to the second ratio of the pressure difference of each area at the corresponding height, that is, the amount of bosh gas in each area is calculated and divided by the pressure difference of the corresponding area to obtain the permeability index of each area. In this case, the permeability index of each small area in the blast furnace is not obtained as the total permeability index of the blast furnace, but the permeability index of each small area in the blast furnace, so that the ability of each small area to receive air volume can be analyzed according to the permeability index of each small area.

[0092] For example, according to the amount of furnace gas in Table 1 and the pressure difference in Table 3, the data table of the permeability index of each area is calculated as shown in Table 4:

[0093] Table 4

[0094] <![CDATA[tz1]]> <![CDATA[tz2]]> <![CDATA[tz3]]> <![CDATA[tz4]]> <![CDATA[tz5]]> <![CDATA[tz6]]> <![CDATA[tz7]]> <![CDATA[tz8]]> 38605 42224 34645 34645 37532 38605 48256 45039 <![CDATA[tz9]]> <![CDATA[tz 10 ]]> <![CDATA[tz 11 ]]> <![CDATA[tz 12 ]]> <![CDATA[tz 13 ]]> <![CDATA[tz 14 ]]> <![CDATA[tz 15 ]]> <![CDATA[tz 16 ]]> 48256 45039 48256 48256 26493 28748 27575 28149 <![CDATA[tz 17 ]]> <![CDATA[tz 18 ]]> <![CDATA[tz 19 ]]> <![CDATA[tz 20 ]]> <![CDATA[tz 21 ]]> <![CDATA[tz 22 ]]> <![CDATA[tz 23 ]]> <![CDATA[tz 24 ]]> 25984 25494 20787 19302 21447 21793 21447 21447

[0095] Among them, tz1 to tz6 represent the permeability index of the six areas between the maximum height pressure measuring point and the furnace top, tz7 to tz 12 Indicates the air permeability index of the six areas between the pressure measuring point at the middle height and the pressure measuring point at the maximum height, tz 13 to tz 18 Indicates the difference in air permeability index of the six areas between the pressure measuring point at the minimum height and the pressure measuring point at the middle height, tz 19 to tz 24 Indicates the permeability index of the six areas between the blast furnace tuyere and the pressure measuring point at the middle height.

[0096] In this embodiment, if the pressure difference is less than or equal to 0, the air permeability index of the corresponding area is recorded as 0.

[0097] Optionally, step S130 includes steps S1301 to S1303.

[0098] Step S1301, obtaining the cold air flow rate of the blast furnace.

[0099] In this embodiment, cold air is heated by a heating furnace to form hot air, and then the hot air is blown into the blast furnace from the lower tuyere of the blast furnace. The size of the cold air flow rate reflects the size of the hot air flow rate, and thus the operating condition of the blast furnace can be reflected by the cold air flow rate.

[0100] Step S1302: If the cold air flow rate is greater than or equal to the preset cold air flow rate threshold, the index difference between the air permeability index at the current moment and the air permeability index at the previous moment, and the temperature difference between the furnace throat temperature at the current moment and the furnace throat temperature at the previous moment are calculated.

[0101] The average value of the cold air flow rate in the non-stop wind reduction state in a period of time before the current moment can be calculated, and the value obtained by multiplying the average value by the set ratio is used as the flow threshold. For example, the average value of the cold air flow rate in the non-stop wind reduction state in the past six months is calculated, and 90% of the average value is used as the flow threshold.

[0102] In this embodiment, when the blast furnace is in the wind-down state, the cold air flow rate may be less than the flow rate threshold, at which time the blast furnace condition will enter an abnormal state, and the air permeability index is not yet stable. If the cold air flow rate is greater than or equal to the preset flow rate threshold, it means that the blast furnace has exited the wind-down state and entered the normal operation state, and the air permeability index is relatively stable. Therefore, the blast furnace condition is normal, and the air supply of the blast furnace is relatively normal. At this time, it can be judged whether a pipeline stroke occurs based on the air permeability index and the furnace throat temperature.

[0103] For example, the average cold air flow rate of the blast furnace in the non-shutdown and reduced wind state in the past six months is 6552, the flow threshold is 5897, and the cold air flow rate at the current moment is 6384. Therefore, the condition of the blast furnace is normal.

[0104] Among them, since the permeability of the blast furnace changes relatively quickly, the first time difference between the current moment and the previous moment when calculating the index difference of the permeability index can be set to be relatively small, for example, 20 seconds, that is, the permeability index can be calculated once every first time difference. However, since the throat temperature of the blast furnace changes slightly slowly, the second time difference between the current moment and the previous moment when calculating the temperature difference of the throat can be set to be slightly larger, for example, 1 minute, that is, the throat temperature is obtained once every second time difference, so that the changes in the permeability index and the throat temperature can be captured more timely.

[0105] Step S1303: If the index difference is less than a preset index difference threshold, or the temperature difference is greater than a preset temperature difference threshold, it is determined that an edge pipe stroke occurs in the blast furnace.

[0106] Among them, the index difference threshold is less than 0, and the temperature difference threshold is greater than 0.

[0107] In this embodiment, when the furnace condition is normal, the decrease value of the permeability index and the increase value of the furnace throat temperature are used to determine whether the blast furnace has an edge pipe stroke. Specifically, if the permeability index decreases, and the decrease value is greater than the absolute value of the index difference threshold, it means that the permeability index decreases too fast, and the blast furnace may have an edge pipe stroke; if the furnace throat temperature increases, and the increase value is greater than the temperature difference threshold, it means that the furnace throat temperature increases too fast, and the blast furnace may have an edge pipe stroke.

[0108] Among them, if the permeability index does not decrease or decreases slightly, and the throat temperature does not rise or rises slightly, it is determined that there is no pipeline travel in the blast furnace.

[0109] Optionally, step S1303 includes:

[0110] The area where the index difference is less than the index difference threshold is determined as an abnormal area, and it is determined that the edge pipeline stroke occurs in the abnormal area in the blast furnace.

[0111] It can be understood that the air permeability index of each area is used to determine whether an edge pipe stroke occurs in each area. If the index difference of a certain area is less than the preset index difference threshold, it means that an edge pipe stroke occurs in the area, so that the range where the edge pipe stroke occurs can be narrowed down, and the specific area where the edge pipe stroke occurs can be determined more accurately.

[0112] Exemplarily, a data table of the index difference between the air permeability index at the current moment and the air permeability index at the previous moment calculated according to Table 4 is shown in Table 5:

[0113]

[0114]

[0115] Among them, dz1 to dz 24 It represents the index difference of 24 areas of the furnace body, and the index difference threshold is 7000. Therefore, from the index difference analysis of the permeability index, there is no edge pipe travel in all areas.

[0116] In this embodiment, the furnace throat temperature is the temperature collected at the temperature measuring point on the furnace throat steel brick, and multiple temperature measuring points can be evenly arranged on the circumference of the furnace throat steel brick, so the furnace throat can be divided into multiple areas according to the temperature measuring points, and each area includes a temperature measuring point. If the temperature difference between the furnace throat temperature of a certain temperature measuring point at the current moment and the furnace throat temperature at the previous moment is greater than the preset temperature difference threshold, it means that the edge pipeline stroke appears in the area corresponding to the temperature measuring point, that is, the specific area where the edge pipeline stroke occurs can be accurately determined.

[0117] For example, 12 temperature measuring points can be evenly arranged around the throat steel bricks, and the data table of the 12 throat temperatures collected is shown in Table 6:

[0118] Table 6

[0119] <![CDATA[sbt1]]> <![CDATA[sbt2]]> <![CDATA[sbt3]]> <![CDATA[sbt4]]> <![CDATA[sbt5]]> <![CDATA[sbt6]]> 73.1 81 74.3 84.1 69.6 93.8 <![CDATA[sbt7]]> <![CDATA[sbt8]]> <![CDATA[sbt9]]> <![CDATA[sbt 10 ]]> <![CDATA[sbt 11 ]]> <![CDATA[sbt 12 ]]> 94 77.3 76.6 70.3 84.5 75.2

[0120] Among them, sbt1 to sbt12 represent 12 furnace throat temperatures.

[0121] Exemplarily, the data table of the temperature differences of 12 furnace throat temperatures calculated according to Table 6 is shown in Table 7:

[0122] Table 7

[0123] <![CDATA[dsz1]]> <![CDATA[dsz2]]> <![CDATA[dsz3]]> <![CDATA[dsz4]]> <![CDATA[dsz5]]> <![CDATA[dsz6]]> -3.7 8.7 17.1 7.5 -1.9 7.5 <![CDATA[dsz7]]> <![CDATA[dsz8]]> <![CDATA[dsz9]]> <![CDATA[dsz 10 ]]> <![CDATA[dsz 11 ]]> <![CDATA[dsz 12 ]]> 3.3 -0.6 4.2 -2.1 3 2.4

[0124] Among them, dsz1 to dsz12 represent the temperature difference of 12 furnace throat temperatures, and the temperature difference threshold is 15. Therefore, the edge pipe stroke appears in the furnace throat area corresponding to the third temperature measurement point.

[0125] Optionally, the riser temperature includes multiple ones, and step S130 also includes steps S1304 to S1306.

[0126] Step S1304, calculating the average value, range value and maximum value of the temperatures of multiple riser pipes.

[0127] In this embodiment, a blast furnace generally includes multiple riser tubes, so multiple riser tube temperatures are collected. At this time, the average value and range value of all riser tube temperatures, as well as the maximum value among them, need to be calculated. The range value is the difference between the maximum value and the maximum value.

[0128] Step S1305: If the average value is greater than the preset average value threshold, or the maximum value is greater than the preset maximum value threshold, it is determined that a central pipeline stroke occurs in the blast furnace.

[0129] In this embodiment, no matter what the condition of the blast furnace is, it is possible to determine whether a pipeline stroke occurs by using the riser temperature. Specifically, if the average value of the riser temperature is greater than a preset average value threshold, or the maximum value is greater than a preset maximum value threshold, it means that the riser temperature is high and a central pipeline stroke may occur in the blast furnace.

[0130] Step S1306: If the extreme value is greater than the preset extreme value threshold, it is determined that the blast furnace has an edge pipe stroke.

[0131] In this embodiment, if the extreme difference value of the riser temperature is greater than the extreme difference threshold, it means that the temperature difference of the riser is large, and at this time, the edge pipe stroke may occur in the blast furnace.

[0132] Exemplarily, the data table of the maximum value, average value and range value of the riser temperature calculated by the above method is shown in Table 8:

[0133] Table 8

[0134] ttmax tavg ttrv 114.5 113.1 1.4

[0135] Among them, ttmax represents the maximum value, ttavg represents the average value, ttrv represents the range value, the average value threshold is 260, the range value threshold is 20, and the maximum value threshold is 300. Therefore, there is no central pipeline trip.

[0136] Optionally, step S140 includes:

[0137] If a pipeline trip occurs within the set first interval time, the frequency of the pipeline trip is increased once; if the frequency within the set second interval time is greater than or equal to the preset frequency threshold, the blast furnace is adjusted according to the preset adjustment measures to eliminate the pipeline trip.

[0138] The second interval time is greater than the first interval time.

[0139] In this embodiment, the frequency of occurrence of the pipeline trip can be counted once every first interval time. If the pipeline trip occurs in the first interval time, the frequency of occurrence increases once. For example, if the first interval time is 1 hour, then whether the pipeline trip occurs is counted once every hour. If the frequency of occurrence in the previous hour is a, and the pipeline trip also occurs in the current hour, the frequency of occurrence is updated to a+1.

[0140] Next, if the frequency in the second interval is greater than or equal to the preset frequency threshold, it means that the pipeline trip occurs a bit too many times. In order to avoid affecting the operating efficiency of the blast furnace, the blast furnace needs to be adjusted and the preset adjustment measures are used to eliminate the pipeline trip.

[0141] If the frequency of occurrence within the set second interval is greater than or equal to the preset frequency threshold, the blast furnace is adjusted according to the preset adjustment measures, including:

[0142] If the frequency within the set second interval is greater than or equal to the frequency threshold, the charging system of the blast furnace is adjusted. If the pipeline stroke is an edge pipeline stroke, the edge charging system of the blast furnace is adjusted; if the pipeline stroke is a center pipeline stroke, the center charging system of the blast furnace is adjusted.

[0143] For example, the second interval is 1 day, the frequency threshold is 2, if there are 2 or more pipeline trips within 1 day, and all of them are center pipeline trips, then the center charging system of the blast furnace is adjusted. Alternatively, the second interval is 2 days, the frequency threshold is 3, if there are 3 or more pipeline trips within 2 days, and all of them are edge pipeline trips, then the edge charging system of the blast furnace is adjusted.

[0144] In this embodiment, if the blast furnace has a pipeline stroke, the blast furnace is controlled to reduce airflow. That is, once a pipeline stroke occurs, the blast furnace can be properly reduced airflow immediately to eliminate the pipeline stroke in the fastest way.

[0145] Based on the same inventive concept, an embodiment of the present invention further provides a blast furnace regulating device, Figure 2 is a structural block diagram of a blast furnace regulating device provided by an embodiment of the present invention, such as Figure 2As shown, the device 200 includes an acquisition module 201 , a determination module 202 , a judgment module 203 and an adjustment module 204 .

[0146] An acquisition module 201 is used to acquire the amount of bosh gas, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace;

[0147] A determination module 202, for determining the permeability index of the blast furnace according to the amount of gas in the furnace, the hot blast pressure, the furnace top pressure and the static pressure;

[0148] A judgment module 203, for judging whether a pipe trip occurs in the blast furnace according to the air permeability index, the riser temperature or the furnace throat temperature;

[0149] The regulating module 204 is used to regulate the blast furnace according to preset regulating measures to eliminate the pipeline stroke if the pipeline stroke occurs.

[0150] Optionally, the judging module 203 includes:

[0151] An acquisition unit, used for acquiring the cold air flow rate of the blast furnace;

[0152] A first calculation unit is used to calculate the index difference between the air permeability index at a current moment and the air permeability index at a previous moment, and the temperature difference between the furnace throat temperature at a current moment and the furnace throat temperature at a previous moment if the cold air flow rate is greater than or equal to a preset cold air flow rate threshold;

[0153] A judgment unit, used for judging that an edge pipe stroke occurs in the blast furnace if the index difference is less than a preset index difference threshold, or the temperature difference is greater than a preset temperature difference threshold;

[0154] Among them, the index difference threshold is less than 0, and the temperature difference threshold is greater than 0.

[0155] Optionally, the determination module 203 is further configured to:

[0156] Calculate the average, range and maximum values ​​of the temperatures of multiple risers;

[0157] If the average value is greater than a preset average value threshold, or the maximum value is greater than a preset maximum value threshold, it is determined that a center pipe stroke occurs in the blast furnace;

[0158] If the extreme value is greater than the preset extreme threshold, it is determined that the blast furnace has a marginal pipe stroke.

[0159] Optionally, the adjustment module 204 is further configured to:

[0160] If a pipeline trip occurs within the set first interval time, the occurrence frequency of the pipeline trip is increased by one;

[0161] If the frequency of occurrence within the set second interval is greater than or equal to the preset frequency threshold, the blast furnace is adjusted according to the preset adjustment measures to eliminate the pipeline trip;

[0162] The second interval time is greater than the first interval time.

[0163] Optionally, the interior of the blast furnace includes areas at different heights, the static pressure includes static pressures at different heights, and the determination module 202 includes:

[0164] The second calculation unit is used to calculate the pressure difference of each area according to the hot air pressure, the furnace top pressure and the static pressure at different heights;

[0165] a third calculation unit, for obtaining the number of regions at the same height if the pressure difference is greater than 0, and calculating a first ratio of the amount of furnace gas to the number;

[0166] The fourth calculation unit is used to calculate the second ratio of the first ratio and the pressure difference of each area at the corresponding height to obtain the permeability index of each area in the blast furnace where the pressure difference is greater than 0.

[0167] Optionally, the first computing unit is further configured to:

[0168] Determine the upper and lower pressures of each area based on the hot blast pressure, furnace top pressure and static pressures in different areas;

[0169] The difference between the lower pressure and the upper pressure is calculated to obtain the pressure difference in each area.

[0170] Optionally, the judging unit is further configured to:

[0171] The area where the index difference is less than the index difference threshold is determined as an abnormal area, and it is determined that the edge pipeline stroke occurs in the abnormal area in the blast furnace.

[0172] It can be understood that the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0173] An embodiment of the present invention further provides an electronic device, which may include a processor and a memory, wherein the processor and the memory may be communicatively connected to each other via a bus or other means.

[0174] The processor may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application, or may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and other chips, or a combination of the above-mentioned chips.

[0175] The memory may include a large capacity memory for data or instructions. By way of example and not limitation, the memory may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. Where appropriate, the memory may include a removable or non-removable (or fixed) medium. Where appropriate, the memory may be inside or outside the electronic device. In a particular embodiment, the memory may be a non-volatile solid-state memory.

[0176] In one example, the memory may be a read-only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0177] The processor implements any one of the blast furnace adjustment methods in the above embodiments by reading and executing computer program instructions stored in the memory.

[0178] In one example, the electronic device may further include a communication interface and a bus. Among them, the processor, memory, and communication interface are connected through a bus and communicate with each other. The communication interface is mainly used to realize the communication between the modules, devices, units and / or devices in the embodiment of the present application. Where appropriate, the bus may include one or more buses.

[0179] In addition, in combination with the blast furnace adjustment method in the above embodiment, the embodiment of the present invention can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the blast furnace adjustment methods in the above embodiment is implemented.

[0180] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0181] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0182] The embodiment of the present invention provides a blast furnace adjustment method, device, equipment and medium, obtains the furnace bosh gas volume, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace, and obtains parameters affecting the stability of the blast furnace; according to the furnace bosh gas volume, hot blast pressure, furnace top pressure and static pressure, the permeability index of the blast furnace is determined to understand the ability of the blast furnace to accept air volume; according to the permeability index, riser temperature or furnace throat temperature, it is judged whether the blast furnace has a pipeline stroke, and multiple parameters are considered to make the judgment more accurate; if a pipeline stroke occurs, the blast furnace is adjusted according to the preset adjustment measures to eliminate the pipeline stroke and improve the production efficiency of the blast furnace. According to the permeability index, riser temperature and furnace throat temperature, the method can more accurately judge whether the blast furnace has a pipeline stroke, and if a pipeline stroke occurs, the adjustment measures are used to adjust it, so as to eliminate the pipeline stroke in time and improve the production efficiency of the blast furnace.

[0183] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0184] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0185] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "one" or "an" preceding a component does not exclude the presence of a plurality of such components. The present invention may be implemented by means of hardware comprising a number of different components and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A method for regulating a blast furnace, characterized in that: The method comprises: Obtain the amount of gas in the bosh, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace; Determining the permeability index of the blast furnace according to the amount of bosh gas, the hot blast pressure, the furnace top pressure and the static pressure; judging whether a pipe stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature; If the pipeline stroke occurs, the blast furnace is adjusted according to preset adjustment measures to eliminate the pipeline stroke.

2. The blast furnace adjustment method according to claim 1, characterized in that: The step of judging whether a pipe stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature includes: Obtaining the cold air flow rate of the blast furnace; If the cold air flow rate is greater than or equal to the preset cold air flow rate threshold, the index difference between the air permeability index at the current moment and the air permeability index at the previous moment, and the temperature difference between the furnace throat temperature at the current moment and the furnace throat temperature at the previous moment are calculated; If the index difference is less than a preset index difference threshold, or the temperature difference is greater than a preset temperature difference threshold, it is determined that the blast furnace has an edge pipe stroke; Among them, the index difference threshold is less than 0, and the temperature difference threshold is greater than 0.

3. The blast furnace adjustment method according to claim 1, characterized in that: The riser temperature includes multiple values, and judging whether the blast furnace has a pipeline trip according to the permeability index, the riser temperature or the furnace throat temperature includes: Calculate the average, range and maximum values ​​of the temperatures of multiple risers; If the average value is greater than a preset average value threshold, or the maximum value is greater than a preset maximum value threshold, it is determined that a central pipe stroke occurs in the blast furnace; If the extreme difference value is greater than a preset extreme difference threshold, it is determined that a marginal pipe stroke occurs in the blast furnace.

4. The blast furnace adjustment method according to claim 1, characterized in that: If the pipeline trip occurs, the blast furnace is adjusted according to a preset adjustment measure to eliminate the pipeline trip, including: If the pipeline trip occurs within the set first interval time, the occurrence frequency of the pipeline trip is increased by one; If the occurrence frequency is greater than or equal to a preset frequency threshold within the set second interval, the blast furnace is adjusted according to a preset adjustment measure to eliminate the pipeline trip; The second interval time is greater than the first interval time.

5. The blast furnace adjustment method according to claim 1, characterized in that: The blast furnace includes areas at different heights, the static pressure includes the static pressures at the different heights, and the permeability index of the blast furnace is determined according to the amount of gas in the furnace, the hot blast pressure, the furnace top pressure and the static pressure, including: Calculating the pressure difference in each area according to the hot blast pressure, the furnace top pressure and the static pressure at different heights; If the pressure difference is greater than 0, the number of regions at the same height is obtained, and a first ratio of the amount of furnace gas to the number is calculated; The first ratio and a second ratio of the pressure difference in each area at a corresponding height are calculated to obtain a permeability index of each area in the blast furnace where the pressure difference is greater than 0.

6. The blast furnace adjustment method according to claim 5, characterized in that: The step of calculating the pressure difference of each area according to the hot blast pressure, the furnace top pressure and the static pressure of the different areas comprises: Determining the upper pressure and the lower pressure of each area according to the hot blast pressure, the furnace top pressure and the static pressure of the different areas; The difference between the lower pressure and the upper pressure is calculated to obtain the pressure difference of each area.

7. The blast furnace adjustment method according to claim 5, characterized in that: If the index difference is less than a preset index difference threshold, or the temperature difference is greater than a preset temperature difference threshold, it is determined that the blast furnace has an edge pipe stroke, including: An area where the index difference is less than the index difference threshold is determined as an abnormal area, and it is determined that the edge pipe stroke occurs in the abnormal area in the blast furnace.

8. A blast furnace regulating device, characterized in that: The device comprises: An acquisition module is used to obtain the amount of bosh gas, hot blast pressure, furnace top pressure, furnace top riser temperature, furnace body static pressure and furnace throat temperature of the blast furnace; A determination module, used to determine the permeability index of the blast furnace according to the amount of bosh gas, the hot blast pressure, the furnace top pressure and the static pressure; A judgment module, used for judging whether a pipeline stroke occurs in the blast furnace according to the permeability index, the riser temperature or the furnace throat temperature; The regulating module is used for regulating the blast furnace according to preset regulating measures if the pipeline stroke occurs, so as to eliminate the pipeline stroke.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 7.

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