Method and device for monitoring state of blast furnace tuyere blowpipe

Abstract

The invention discloses a state monitoring method and device for a blast furnace tuyere blowpipe. The method comprises the following steps: acquiring a current internal image of the blast-furnace tuyere blowpipe, a current hot air temperature of the blast-furnace tuyere blowpipe and a current hot air pressure of the blast-furnace tuyere blowpipe; determining a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined different preset hot air temperatures and standard images corresponding to different preset hot air pressures; and determining the state of the blast furnace tuyere blowpipe according to the current internal image and standard images corresponding to the current hot air temperature and the current hot air pressure. According to the technical scheme, the problems of discontinuity and dependence on artificial experience of manual observation are solved, the real-time performance and continuity of monitoring are improved, the subjectivity of manual judgment is reduced, the accuracy of a monitoring result is improved, and it is ensured that countermeasures are taken in time.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace smelting, and in particular to a state monitoring method and device for a blast furnace tuyere blowpipe. Background Art

[0002] In the steelmaking process, the blast furnace is one of the core equipment, and the tuyere blowpipe inside it is crucial to the entire production process. The blowpipe is at risk of being burned through under the action of high-pressure hot air, which has caused many accidents in domestic blast furnaces and brought significant economic losses to enterprises.

[0003] Existing blowpipe monitoring methods mainly rely on manual observation through a peephole or dynamic images taken by a tuyere camera to judge the internal operating status of the blowpipe. Manual observation cannot achieve continuous monitoring and is easily affected by subjective judgment; although the camera can provide dynamic images, it cannot judge the operating status of the blowpipe in real time and accurately. Summary of the invention

[0004] The embodiment of the present invention provides a method and device for monitoring the status of a blast furnace tuyere blowpipe, so as to solve the problem that manual observation cannot achieve continuous monitoring and is easily affected by subjective judgment; and cannot judge the operating status of the blowpipe in real time and accurately.

[0005] In a first aspect, an embodiment of the present invention provides a method for monitoring the status of a blast furnace tuyere blowing pipe, comprising:

[0006] Acquire the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the current hot blast pressure of the blast furnace tuyere blowpipe;

[0007] Determine the standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and the predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures;

[0008] The state of the blast furnace tuyere blowing pipe is determined based on the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

[0009] In a second aspect, an embodiment of the present invention provides a state monitoring device for a blast furnace tuyere blowpipe, comprising:

[0010] A data acquisition module, used to acquire a current internal image of the blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe;

[0011] A standard image determination module, used to determine a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures;

[0012] The state determination module is used to determine the state of the blast furnace tuyere blowing pipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

[0013] The technical solution of the embodiment of the present invention determines the standard image corresponding to the current hot blast temperature and the current hot blast pressure by acquiring the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the standard images corresponding to different preset hot blast temperatures and different preset hot blast pressures, thereby determining the state of the blast furnace tuyere blowpipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure. In the prior art, there may be a certain difference between the temperature measured by the temperature sensor and the temperature inside the tuyere blowpipe. This embodiment determines the state of the tuyere blowpipe by combining the temperature, the pressure, and the internal image of the tuyere blowpipe, so that the determined state is more accurate, solves the problems of intermittent manual observation and dependence on manual experience, improves the real-time and continuity of monitoring, reduces the subjectivity of manual judgment, improves the accuracy of monitoring results, and ensures that countermeasures are taken in a timely manner.

[0014] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a flow chart of a method for monitoring the status of a blast furnace tuyere blowing pipe provided according to Embodiment 1 of the present invention;

[0017] Figure 2 This is the existing blast furnace tuyere blowpipe structure diagram;

[0018] Figure 3 is a flow chart of another method for monitoring the status of blast furnace tuyere blowing pipes provided according to the second embodiment of the present invention;

[0019] Figure 4 is a flow chart of a method for monitoring the status of a blast furnace tuyere blowing pipe provided according to Embodiment 3 of the present invention;

[0020] Figure 5is a flow chart of a method for monitoring the status of a blast furnace tuyere blowing pipe provided according to a fourth embodiment of the present invention;

[0021] Figure 6 is a flow chart of a method for monitoring the status of a blast furnace tuyere blowing pipe provided in accordance with Embodiment 5 of the present invention;

[0022] Figure 7 is a flow chart of a method for monitoring the status of a blast furnace tuyere blowing pipe provided according to Embodiment 6 of the present invention;

[0023] Figure 8 The internal image of the blast furnace tuyere blowpipe 1-16 obtained according to a blast furnace tuyere blowpipe status monitoring method provided by the present invention;

[0024] Fig. 9 The internal image of the blast furnace tuyere blowpipe 17-30 obtained according to a blast furnace tuyere blowpipe status monitoring method provided by the present invention;

[0025] Fig.10 It is a structural schematic diagram of a blast furnace tuyere blowpipe status monitoring device provided according to Embodiment 7 of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Embodiment 1

[0029] Figure 1The flowchart of a method for monitoring the status of a blast furnace tuyere blowpipe is provided in the first embodiment of the present invention. The first embodiment of the present invention provides a method for monitoring the status of a blast furnace tuyere blowpipe. The method can be performed by a device for monitoring the status of a blast furnace tuyere blowpipe. The device can be implemented in the form of hardware and / or software and can be configured in the blast furnace tuyere blowpipe. Figure 1 As shown, the method includes:

[0030] S101, obtaining a current internal image of a blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe.

[0031] Among them, the blast furnace tuyere blowpipe is a very critical equipment in blast furnace production. There are dozens of tuyere evenly distributed around the blast furnace hearth, and each tuyere has a tuyere blowpipe. The tuyere blowpipe is a pipe structure with a refractory casting layer inside and a steel shell outside; Figure 2 As shown, the front end 4 of the blowpipe is a smooth arc-shaped spherical surface near the furnace. The blowpipe is provided with a coal gun insertion hole 2, and the coal gun is inserted into the center of the blowpipe from the coal gun insertion hole 2. The coal powder is sprayed into the tuyere and then burned to generate coal gas that enters the blast furnace. The rear end 1 of the blowpipe is provided with a peephole (high temperature resistant glass lens), through which the internal state of the blowpipe can be roughly observed. A tuyere camera device can be installed in the peephole to dynamically capture the internal picture of the tuyere blowpipe. During the production of the blast furnace, the front end of the blowpipe is extended into the tuyere small sleeve and directly reaches the furnace; the rear end of the blowpipe is connected to the hot air surrounding pipe. During the production period, hot air with a pressure of 400kpa or even higher and a temperature of 1200℃ or even higher is blown into the blast furnace. During the operation of the blowpipe, the internal refractory material is subjected to the action of high pressure hot air, and the temperature of the outer shell is generally 200℃ or even higher.

[0032] The current internal image is a real-time image of the interior of the blast furnace tuyere blowpipe obtained by the tuyere camera device. The current hot blast temperature is the real-time temperature of the interior of the blast furnace tuyere blowpipe obtained by the temperature sensor. The current hot blast pressure is the real-time pressure of the interior of the blast furnace tuyere blowpipe obtained by the pressure sensor.

[0033] S102, determining a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures.

[0034] The predetermined standard images corresponding to different preset hot blast temperatures and different preset hot blast pressures are reference images obtained by analyzing the internal images of the blast furnace tuyere blowpipe at different hot blast temperatures and different hot blast pressures, and each standard image is an image corresponding to the normal state of the blast furnace tuyere blowpipe at a preset hot blast temperature and a preset hot blast pressure. The preset hot blast temperature that is the same as the current hot blast temperature and the preset hot blast pressure that is the same as the current hot blast pressure can be searched, and the standard images corresponding to the same hot blast temperature and hot blast pressure can be determined as the standard images corresponding to the current hot blast temperature and the current hot blast pressure.

[0035] S103, determining the state of the blast furnace tuyere blowing pipe according to the current internal image and the standard image corresponding to the current hot blast temperature and hot blast pressure.

[0036] Among them, the state of the blast furnace tuyere blowpipe refers to the operating status of the tuyere blowpipe during the blast furnace production process. The state of the blast furnace tuyere blowpipe is determined by the brightness difference between the current internal image and the standard image corresponding to the current hot air temperature and hot air pressure. Exemplarily, the normal working state corresponds to the standard image. Under the same temperature and pressure conditions, when a foreign object passes through the tuyere blowpipe, the tuyere brightness becomes darker and the brightness value decreases. When the refractory material poured inside the tuyere blowpipe falls, the brightness inside the tuyere blowpipe decreases during the falling process. At this time, the brightness of the current internal image is lower than the standard image. Therefore, when the brightness of the current internal image is lower than the brightness of the standard image, it can be determined that the refractory material poured inside the tuyere blowpipe has fallen.

[0037] During the falling process of the poured refractory material, the moment the outer steel shell is exposed, the high-temperature hot air contacts the steel shell, the steel shell begins to heat up, and the temperature of the steel shell rises rapidly. When the temperature of an object made of steel rises sharply, the brightness will increase sharply. At this time, the brightness of the current internal image is higher than that of the standard image. Therefore, when the brightness of the current internal image is higher than that of the standard image, it can be determined that the steel shell of the tuyere blowpipe is exposed.

[0038] When the outer steel shell of the blowpipe is burned through by the high-temperature hot air, the hot air begins to flow back from the leak point to the outside atmosphere at the moment of burning through. At this time, the hot air contacts the outside atmosphere, the brightness of the area begins to decrease, and the brightness difference between the current internal image and the standard image gradually decreases. Therefore, when the brightness difference between the current internal image and the standard image gradually decreases, it can be determined that the steel shell of the tuyere blowpipe is burned through.

[0039] The technical solution of the embodiment of the present invention determines the standard image corresponding to the current hot blast temperature and the current hot blast pressure by acquiring the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the standard images corresponding to different preset hot blast temperatures and different preset hot blast pressures, thereby determining the state of the blast furnace tuyere blowpipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure. In the prior art, there may be a certain difference between the temperature measured by the temperature sensor and the temperature inside the tuyere blowpipe. This embodiment determines the state of the tuyere blowpipe by combining the temperature, the pressure, and the internal image of the tuyere blowpipe, so that the determined state is more accurate, solves the problems of intermittent manual observation and dependence on manual experience, improves the real-time and continuity of monitoring, reduces the subjectivity of manual judgment, improves the accuracy of monitoring results, and ensures that countermeasures are taken in a timely manner.

[0040] Embodiment 2

[0041] Figure 3 is a flow chart of another method for monitoring the status of blast furnace tuyere blowpipe provided in the second embodiment of the present invention, with reference to Figure 1 and Figure 3 Based on the first embodiment, this embodiment further optimizes S103, determining the state of the blast furnace tuyere blowpipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure, to: S203, determining the state of the blast furnace tuyere blowpipe according to the brightness difference between the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure. Figure 3 As shown, the optimized blast furnace tuyere blowing pipe state monitoring method includes:

[0042] S201, obtaining a current internal image of a blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe.

[0043] S202: Determine a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures.

[0044] S203, determining the state of the blast furnace tuyere blowing pipe according to the brightness difference between the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

[0045] Among them, the average brightness of the current internal image and the average brightness of the standard image can be calculated, and the brightness difference can be determined according to the average brightness of the current internal image and the average brightness of the standard image, so as to determine the state of the blast furnace tuyere blowing pipe according to the brightness difference. In addition, the current internal image and the standard image can also be partitioned, the average brightness of each partition can be calculated, and the average brightness difference of each partition between the internal image and the standard image can be calculated, and the brightness difference of the current image and the standard image can be determined according to the average brightness difference of each partition.

[0046] The technical solution of the embodiment of the present invention obtains the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe and the current hot blast pressure of the blast furnace tuyere blowpipe, as well as the predetermined standard images corresponding to different preset hot blast temperatures and different preset hot blast pressures, and determines the state of the blast furnace tuyere blowpipe according to the brightness difference between the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure, thereby solving the problems of intermittent manual observation and dependence on manual experience, reducing the subjectivity of manual judgment and improving the accuracy of monitoring results.

[0047] Embodiment 3

[0048] Figure 4 is a flow chart of another method for monitoring the status of blast furnace tuyere blowpipe provided in Embodiment 3 of the present invention, with reference to Figure 3 and Figure 4 This embodiment is based on the second embodiment, and further refines S203, determining the state of the blast furnace tuyere blowing pipe according to the current internal image and the brightness difference of the standard image corresponding to the current hot blast temperature and the current hot blast pressure, as follows: S3031, dividing the current internal image into at least two first sub-regions. S3032, dividing the standard image corresponding to the current hot blast temperature and the current hot blast pressure into at least two second sub-regions; wherein the first sub-region and the second sub-region correspond one to one. S3033, determining the brightness difference of the sub-region image between the first sub-region and the corresponding second sub-region. S3034, determining the abnormal state and abnormal region of the blast furnace tuyere blowing pipe according to the brightness difference of each sub-region image. Figure 4 As shown, the refined state monitoring method of blast furnace tuyere blowing pipe includes:

[0049] S301, obtaining a current internal image of a blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe.

[0050] S302: Determine a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures.

[0051] S3031, dividing the current internal image into at least two first sub-areas;

[0052] Herein, at least two means two or more, and each first sub-region is independent of other first sub-regions.

[0053] S3032, dividing the standard image corresponding to the current hot air temperature and the current hot air pressure into at least two second sub-areas; wherein the first sub-areas and the second sub-areas correspond one to one;

[0054] The number of the second sub-areas is the same as that of the first sub-areas, and the division method is the same. For example, the current internal image is divided into eight first sub-areas, the corresponding second sub-areas are also eight, and the blowpipe is divided into eight third sub-areas. The first sub-area and the second sub-area correspond to the same third sub-area in the blast furnace tuyere blowpipe.

[0055] S3033, determining a sub-region image brightness difference between the first sub-region and the corresponding second sub-region;

[0056] The average brightness of the first sub-region and the average brightness of the second sub-region may be calculated, and the brightness of the first sub-region and the average brightness of the second sub-region may be subtracted or divided to obtain the sub-region image brightness difference between the first sub-region and the corresponding second sub-region.

[0057] S3034. Determine the abnormal state and abnormal area of ​​the blast furnace tuyere blowing pipe according to the brightness difference of each sub-area image.

[0058] Among them, the abnormal state may include the falling of the refractory cast inside the tuyere blowpipe, the exposure of the steel shell, and the burning through of the steel shell. The abnormal area refers to the area corresponding to the blast furnace tuyere blowpipe corresponding to the abnormal state. When the brightness difference between the first sub-area and the second sub-area is greater than a certain value, the third sub-area of ​​the annoying blast furnace tuyere blowpipe corresponding to the first sub-area and the second sub-area is an abnormal area.

[0059] The technical solution of the embodiment of the present invention divides the current internal image and the standard image into regions and makes one-to-one correspondence, and determines the abnormal region and abnormal state of the tuyere blowpipe according to the brightness difference of the corresponding regions. The embodiment of the present invention can realize accurate monitoring and management of different regions of the tuyere blowpipe, and improve the precision and accuracy of monitoring.

[0060] Embodiment 4

[0061] Figure 5 is a flow chart of a method for monitoring the status of a blast furnace tuyere blowpipe provided in Embodiment 4 of the present invention, with reference to Figure 4 and Figure 5, based on the third embodiment, this embodiment further adds S3034, determining the abnormal state and abnormal area of ​​the blast furnace tuyere blowpipe according to the brightness difference of each sub-region image. It is refined as follows: S40341. If the brightness difference of the sub-region image of the preset first sub-region is greater than the first preset difference, and less than or equal to the second preset difference, then the state of the blast furnace tuyere blowpipe is the first abnormal state, and the first sub-region whose sub-region image brightness difference is greater than the first preset difference, and less than or equal to the second preset difference is the abnormal area; wherein, the preset first sub-region is the first sub-region with the largest brightness difference of the sub-region image among the first sub-regions of the blast furnace tuyere blowpipe. S40342. If the brightness difference of the sub-region image of the preset first sub-region is greater than the second preset difference, then the state of the blast furnace tuyere blowpipe is the second abnormal state, and the first sub-region whose sub-region image brightness difference is greater than the first preset difference, and less than or equal to the second preset difference is the abnormal area. Figure 5 As shown, the refined blast furnace tuyere blowpipe status monitoring method includes:

[0062] S401, obtaining a current internal image of a blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe.

[0063] S402: Determine a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures.

[0064] S4031. Divide the current internal image into at least two first sub-areas.

[0065] S4032. Divide the standard image corresponding to the current hot air temperature and the current hot air pressure into at least two second sub-areas; wherein the first sub-area and the second sub-area correspond one to one.

[0066] S4033: Determine a sub-region image brightness difference between the first sub-region and the corresponding second sub-region.

[0067] S40341. If the brightness difference of the sub-region image of the preset first sub-region is greater than the first preset difference and less than or equal to the second preset difference, the state of the blast furnace tuyere blowpipe is a first abnormal state, and the first sub-region whose sub-region image brightness difference is greater than the first preset difference and less than or equal to the second preset difference is an abnormal region; wherein the preset first sub-region is the first sub-region with the largest brightness difference of the sub-region image among the first sub-regions of the blast furnace tuyere blowpipe.

[0068] S40342. If the brightness difference of the sub-region image of the preset first sub-region is greater than the second preset difference, the state of the blast furnace tuyere blowing pipe is the second abnormal state, and the first sub-region whose brightness difference of the sub-region image is greater than the first preset difference and is less than or equal to the second preset difference is an abnormal region.

[0069] Among them, the sub-region image brightness difference is obtained by subtracting the image brightness of the first sub-region from the image brightness of the second sub-region and then dividing it by the image brightness of the second sub-region, and is expressed in percentage form. The first preset difference and the second preset difference are two different preset thresholds of image brightness deviation, expressed in percentage form. Exemplarily, the first preset difference can be set to 20%, and the second preset difference can be set to 60%. The preset first sub-region image brightness difference is greater than 20% and less than or equal to 60%, at which time the blast furnace tuyere blowpipe state is the first abnormal state. When the preset sub-region image brightness difference is greater than 60%, the blast furnace tuyere blowpipe state is the second abnormal state, and the first sub-regions corresponding to the first abnormal state and the second abnormal state are both abnormal regions. The first abnormal state can be the state of the refractory material cast inside the tuyere blowpipe falling or other states. In the first abnormal state, the actual temperature inside the tuyere blowpipe is different from the temperature measured by the temperature sensor. At this time, the tuyere temperature rises and the image brightness deviation is large. The second abnormal state may be a state in which the exposed temperature of the outer steel shell of the blowpipe rises sharply until it is burned through by high-temperature hot air, or it may be other states. In the second abnormal state, the actual temperature inside the blowpipe at the air outlet is significantly different from the temperature measured by the temperature sensor, and the image brightness deviation is large at this time.

[0070] The preset first sub-region is the first sub-region in which the image brightness difference of the sub-region is the largest among the first sub-regions of the blast furnace tuyere blowpipe. The state of the tuyere blowpipe is determined according to the image brightness difference of the preset first sub-region, which can more accurately determine the state of the tuyere blowpipe and ensure safety.

[0071] This embodiment determines the abnormal area of ​​the blast furnace tuyere blowpipe and the abnormal state of the blast furnace tuyere blowpipe according to the difference in image brightness between each first sub-area and the second sub-area, thereby realizing accurate monitoring and management of different areas of the blast furnace tuyere blowpipe and improving the precision and accuracy of monitoring.

[0072] Embodiment 5

[0073] Figure 6 is a flow chart of a method for monitoring the status of a blast furnace tuyere blowpipe provided in Embodiment 5 of the present invention, with reference to Figure 4 and Figure 6, this embodiment optimizes the above embodiment. Specifically, after S3034 determines the abnormal state and abnormal area of ​​the blast furnace tuyere blowpipe according to the brightness difference of each sub-region image, the following steps are added: S5041. If the state of the blast furnace tuyere blowpipe is the first abnormal state, an early warning is issued, and the atomizing cooling system is controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe; S5042. If the state of the blast furnace tuyere blowpipe is the second abnormal state, an early warning is issued, and the atomizing cooling system is controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe, and the wind of the blast furnace tuyere blowpipe is reduced. Reference Figure 6 The optimized blast furnace tuyere blowing pipe state monitoring method includes the following steps:

[0074] S501, obtaining a current internal image of a blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe.

[0075] S502: Determine a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures.

[0076] S5031. Divide the current internal image into at least two first sub-areas.

[0077] S5032. Divide the standard image corresponding to the current hot air temperature and the current hot air pressure into at least two second sub-areas; wherein the first sub-area and the second sub-area correspond one to one.

[0078] S5033: Determine a sub-region image brightness difference between the first sub-region and the corresponding second sub-region.

[0079] S5034. Determine the abnormal state and abnormal area of ​​the blast furnace tuyere blowing pipe according to the brightness difference of each sub-area image.

[0080] S5041. If the state of the blast furnace tuyere blowpipe is the first abnormal state, an early warning is issued, and the atomization cooling system is controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe;

[0081] Among them, each tuyere is equipped with an atomizing cooling system, and a spray cooling water pipe is set at the middle point between every two tuyere. For example, the blast furnace has 30 tuyere blowpipes, and each tuyere blowpipe is equipped with a camera device. The tuyere cameras are numbered according to the order of the tuyere: 1, 2, 3...30. Assuming that the first abnormal state occurs on the left side of blowpipe No. 1, a spray water pipe nozzle is installed between tuyere No. 1 and No. 2. After opening, the spray water can be sprayed to the left side of No. 1 and the right side of No. 2. When the temperature is too high, water spray cooling can reduce the temperature of the blast furnace tuyere blowpipe to ensure production safety.

[0082] S5042. If the state of the blast furnace tuyere blowpipe is the second abnormal state, an early warning is issued, and the atomization cooling system is controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe, and the air flow of the blast furnace tuyere blowpipe is reduced.

[0083] Among them, if the state of the blast furnace tuyere blowpipe is the second abnormal state, the abnormal state is more serious than the first abnormal state, and the atomization cooling system needs to be controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe and reduce the air flow of the blast furnace tuyere blowpipe. Reducing the air flow can reduce the combustion intensity in the furnace, reduce the furnace temperature, and avoid safety problems caused by excessive temperature.

[0084] The technical solution of the embodiment of the present invention divides the current internal image, the preset hot blast temperature and the standard image corresponding to different preset hot blast pressures into regions and makes one-to-one correspondence, and takes corresponding measures for the blast furnace tuyere blowing pipe according to different abnormal states of the corresponding regions. The embodiment of the present invention can help realize accurate monitoring and management of different regions of the blast furnace, and improve the production efficiency and safety of the blast furnace.

[0085] Embodiment 6

[0086] Figure 7 The flowchart of the state monitoring method of the blast furnace tuyere blowing pipe provided by the sixth embodiment of the present invention is shown in FIG. Figure 7 Based on the above embodiments, this embodiment further adds S601, obtaining multiple internal images of the blast furnace tuyere blowpipe at each preset hot blast temperature and each preset hot blast pressure, before S101, obtaining the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the current hot blast pressure of the blast furnace tuyere blowpipe. S602, based on multiple internal images corresponding to the same preset hot blast temperature and the same preset hot blast pressure, determine the standard image corresponding to the preset hot blast temperature and the preset hot blast pressure. Figure 7 As shown, the method includes:

[0087] S601, obtaining multiple internal images of the blast furnace tuyere blowpipe at each preset hot blast temperature and each preset hot blast pressure.

[0088] Among them, the multiple internal images refer to images obtained by real-time dynamic photography of the internal state of the blowpipe by a blast furnace tuyere camera at different hot blast temperatures and different hot blast pressures of the blast furnace. Figure 8 The internal image of the blast furnace tuyere blowpipe 1-16 obtained according to a blast furnace tuyere blowpipe status monitoring method provided by the present invention; Figure 8 The internal image of the blast furnace tuyere blowpipe 17-30 obtained by a state monitoring method of the blast furnace tuyere blowpipe provided by the present invention. Figure 8 and Fig. 9As shown, 30 internal images of blast furnace tuyere blowpipes are obtained. Exemplarily, at each temperature point of each tuyere blowpipe in the hot blast temperature range, at least 50 standard images are obtained; at each tuyere blowpipe, at each wind pressure value in the hot blast wind pressure range corresponds to a different temperature point, and at least 50 standard images are obtained. For example, the hot blast temperature range is 1181-1220℃, so there are 40 temperature points; the wind pressure fluctuation range is 381-400kpa, and the wind pressure range is 20KPa; each temperature point corresponds to 21 pressure values, and each pressure value corresponds to 40 wind temperature values, so the pictures obtained for each tuyere blowpipe are at least: 21*40*50 groups.

[0089] S602: Determine a standard image corresponding to the preset hot air temperature and the preset hot air pressure according to a plurality of internal images corresponding to the same preset hot air temperature and the same preset hot air pressure.

[0090] Specifically, brightness analysis or chromaticity analysis can be performed on multiple internal images corresponding to the same preset hot air temperature and the same preset hot air pressure, and the standard image can be determined according to the brightness or chromaticity of the image. For example, an image with a brightness at a median brightness value can be determined as the standard image.

[0091] S603, obtaining a current internal image of the blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe.

[0092] S604, determining a standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures;

[0093] S605. Determine the state of the blast furnace tuyere blowing pipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

[0094] The technical solution of the embodiment of the present invention obtains multiple internal images corresponding to different preset hot blast temperatures and different preset hot blast pressures, and determines a standard image based on the multiple internal images, so that the standard image can accurately reflect the state of the tuyere blowing pipe under normal conditions. The determination of the standard image provides an intuitive basis for determining the state of the blast furnace.

[0095] In some optional embodiments of the present invention, based on multiple internal images corresponding to the same preset hot air temperature and the same preset hot air pressure, a standard image corresponding to the preset hot air temperature and the preset hot air pressure is determined, including: determining the brightness of each internal image; determining the standard image based on the brightness of multiple internal images corresponding to the same preset hot air temperature and the same preset hot air pressure.

[0096] The brightness of the multiple internal images can be measured by using a brightness detector to detect the brightness of pictures with the same hot air temperature and pressure parameters under all air outlet numbers, thereby obtaining brightness data of the multiple internal images.

[0097] In some optional embodiments of the present invention, a standard image is determined based on the brightness of multiple internal images corresponding to the same preset hot air temperature and the same preset hot air pressure, including: determining a median value of the brightness of the multiple internal images; and determining one or more internal images corresponding to the median value as the standard image.

[0098] The median value of the brightness of the multiple internal images refers to the middle value after sorting the image brightness values, reflecting the middle trend of the overall brightness distribution of the multiple internal images.

[0099] In some embodiments of the present invention, the method for monitoring the status of a blast furnace tuyere blowpipe further comprises:

[0100] When the blast furnace is in a slow wind or wind-off state, stop acquiring the current internal image of the blast furnace tuyere blowpipe, the current hot air temperature of the blast furnace tuyere blowpipe, and the current hot air pressure of the blast furnace tuyere blowpipe.

[0101] Among them, slow wind refers to reducing the amount of air sent into the blast furnace, while wind stop means completely stopping the air supply. When the blast furnace is in the slow wind or wind stop state, the internal temperature of the blast furnace will gradually decrease. At this time, the current internal image, current hot air temperature and current hot air pressure of the blast furnace tuyere blowpipe are stopped to avoid wasting resources.

[0102] Embodiment 7

[0103] Fig.10 Schematic diagram of the structure of a blast furnace tuyere blowpipe status monitoring device provided by Embodiment 7 of the present invention. Fig.10 As shown, the device comprises:

[0104] The data acquisition module 701 is used to acquire the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the current hot blast pressure of the blast furnace tuyere blowpipe;

[0105] The standard image determination module 702 is used to determine the standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and the predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures;

[0106] The state determination module 703 is used to determine the state of the blast furnace tuyere blowing pipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

[0107] The state monitoring device for blast furnace tuyere blowpipe provided in the embodiment of the present invention can execute the state monitoring method for blast furnace tuyere blowpipe provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not described in detail in this embodiment, please refer to the state monitoring method provided in any embodiment of the present invention.

[0108] Since the above-mentioned state monitoring device for blast furnace tuyere blowing pipes is a device that can execute the state monitoring method for blast furnace tuyere blowing pipes in the embodiment of the present invention, based on the state monitoring method for blast furnace tuyere blowing pipes introduced in the embodiment of the present invention, the technical personnel of the field can understand the specific implementation of the state monitoring device for blast furnace tuyere blowing pipes in the present embodiment and its various variations, so how the state monitoring device for blast furnace tuyere blowing pipes implements the state monitoring method in the embodiment of the present invention is not described in detail here. As long as the technical personnel of the field implement the device used by the state monitoring method for blast furnace tuyere blowing pipes in the embodiment of the present invention, it belongs to the scope of protection of this application.

[0109] Optionally, the state determination module 703 is specifically used to:

[0110] The state of the blast furnace tuyere blowing pipe is determined according to the brightness difference between the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

[0111] Optionally, the state determination module 703 includes:

[0112] A first submodule, configured to divide the current internal image into at least two first sub-areas;

[0113] A second submodule, configured to divide the standard image corresponding to the current hot air temperature and the current hot air pressure into at least two second sub-areas; wherein the first sub-areas correspond to the second sub-areas one by one;

[0114] A third submodule, configured to determine a sub-region image brightness difference between the first sub-region and the corresponding second sub-region;

[0115] The fourth submodule is used to determine the abnormal state and abnormal area of ​​the blast furnace tuyere blowing pipe according to the brightness difference of each sub-area image.

[0116] Optionally, the fourth submodule is specifically used for:

[0117] If the brightness difference of the sub-region image of the preset first sub-region is greater than the first preset difference and less than or equal to the second preset difference, the state of the blast furnace tuyere blowpipe is the first abnormal state, and the first sub-region whose sub-region image brightness difference is greater than the first preset difference and less than or equal to the second preset difference is the abnormal region; wherein the preset first sub-region is the first sub-region with the largest brightness difference of the sub-region image among all the first sub-regions of the blast furnace tuyere blowpipe;

[0118] If the brightness difference of the sub-area image of the preset first sub-area is greater than the second preset difference, the state of the blast furnace tuyere blowing pipe is the second abnormal state, and the first sub-area whose brightness difference of the sub-area image is greater than the first preset difference and is less than or equal to the second preset difference is the abnormal area.

[0119] Optionally, the status monitoring device further includes:

[0120] A cooling module is used for, after determining the abnormal state and abnormal area of ​​the blast furnace tuyere blowpipe according to the brightness difference of each sub-area image, if the state of the blast furnace tuyere blowpipe is a first abnormal state, issuing an early warning, and controlling the atomization cooling system to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe; if the state of the blast furnace tuyere blowpipe is a second abnormal state, issuing an early warning, and controlling the atomization cooling system to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe, and reducing the air flow of the blast furnace tuyere blowpipe.

[0121] Optionally, the status monitoring device further includes:

[0122] An internal image acquisition module, used for acquiring a plurality of internal images of the blast furnace tuyere blowpipe at each preset hot blast temperature and each preset hot blast pressure before acquiring the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe and the current hot blast pressure of the blast furnace tuyere blowpipe;

[0123] The image determination module is used to determine a standard image corresponding to the preset hot air temperature and the preset hot air pressure based on multiple internal images corresponding to the same preset hot air temperature and the same preset hot air pressure.

[0124] Optionally, the image determination module includes:

[0125] a brightness determination submodule, used to determine the brightness of each internal image;

[0126] The image determination submodule is used to determine the standard image according to the brightness of multiple internal images corresponding to the same preset hot air temperature and the same preset hot air pressure.

[0127] Optionally, the image determination submodule includes:

[0128] a median value determination unit, used to determine a median value of brightness of a plurality of internal images;

[0129] The image determination unit is used to determine one or more internal images corresponding to the median value as the standard image.

[0130] Optionally, the status monitoring device further includes:

[0131] The stop module is used to stop obtaining the current internal image of the blast furnace tuyere blowpipe, the current hot air temperature of the blast furnace tuyere blowpipe and the current hot air pressure of the blast furnace tuyere blowpipe when the blast furnace is in a slow wind or wind-off state.

[0132] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0133] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring the status of a blast furnace tuyere blowpipe, It is characterized in that include: Acquire the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the current hot blast pressure of the blast furnace tuyere blowpipe; Determine the standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures; The state of the blast furnace tuyere blowing pipe is determined according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

2. The state monitoring method according to claim 1, It is characterized in that Determining the state of the blast furnace tuyere blowing pipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure includes: The state of the blast furnace tuyere blowing pipe is determined according to the brightness difference between the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

3. The state monitoring method according to claim 2, It is characterized in that Determining the state of the blast furnace tuyere blowing pipe according to the brightness difference between the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure includes: Dividing the current internal image into at least two first sub-areas; Dividing the standard image corresponding to the current hot air temperature and the current hot air pressure into at least two second sub-areas; wherein the first sub-areas correspond to the second sub-areas one by one; Determining a sub-region image brightness difference between the first sub-region and a corresponding second sub-region; The abnormal state and abnormal area of ​​the blast furnace tuyere blowing pipe are determined according to the brightness difference of each sub-area image.

4. The state monitoring method according to claim 3, It is characterized in that Determining the abnormal state and abnormal area of ​​the blast furnace tuyere blowing pipe according to the brightness difference of each sub-region image includes: If the brightness difference of the sub-region image of the preset first sub-region is greater than the first preset difference and less than or equal to the second preset difference, the state of the blast furnace tuyere blowpipe is the first abnormal state, and the first sub-region whose sub-region image brightness difference is greater than the first preset difference and less than or equal to the second preset difference is the abnormal region; wherein the preset first sub-region is the first sub-region with the largest brightness difference of the sub-region image among all the first sub-regions of the blast furnace tuyere blowpipe; If the brightness difference of the sub-area image of the preset first sub-area is greater than the second preset difference, the state of the blast furnace tuyere blowing pipe is the second abnormal state, and the first sub-area whose brightness difference of the sub-area image is greater than the first preset difference and is less than or equal to the second preset difference is the abnormal area.

5. The state monitoring method according to claim 3, It is characterized in that After determining the abnormal state and abnormal area of ​​the blast furnace tuyere blowing pipe according to the brightness difference of each sub-region image, the method further includes: If the state of the blast furnace tuyere blowpipe is the first abnormal state, an early warning is issued, and the atomization cooling system is controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe; If the state of the blast furnace tuyere blowpipe is the second abnormal state, an early warning is issued, and the atomization cooling system is controlled to spray water to cool the abnormal area of ​​the blast furnace tuyere blowpipe, and the air flow of the blast furnace tuyere blowpipe is reduced.

6. The state monitoring method according to claim 1, It is characterized in that Before obtaining the current internal image of the blast furnace tuyere blowpipe, the current hot blast temperature of the blast furnace tuyere blowpipe, and the current hot blast pressure of the blast furnace tuyere blowpipe, the following is also included: Acquire multiple internal images of the blast furnace tuyere blowpipe at each preset hot blast temperature and each preset hot blast pressure; According to a plurality of internal images corresponding to the same preset hot air temperature and the same preset hot air pressure, a standard image corresponding to the preset hot air temperature and the preset hot air pressure is determined.

7. The state monitoring method according to claim 6, It is characterized in that Determining a standard image corresponding to the preset hot air temperature and the preset hot air pressure according to a plurality of internal images corresponding to the same preset hot air temperature and the same preset hot air pressure includes: determining the brightness of each internal image; The standard image is determined according to the brightness of a plurality of internal images corresponding to the same preset hot air temperature and the same preset hot air pressure.

8. The state monitoring method according to claim 7, It is characterized in that Determining the standard image according to the brightness of a plurality of internal images corresponding to the same preset hot air temperature and the same preset hot air pressure includes: determining a median value of brightness of the plurality of internal images; One or more internal images corresponding to the median value are determined as the standard images.

9. The state monitoring method according to claim 1, It is characterized in that Also includes: When the blast furnace is in a slow wind or wind-off state, stop acquiring the current internal image of the blast furnace tuyere blowpipe, the current hot air temperature of the blast furnace tuyere blowpipe, and the current hot air pressure of the blast furnace tuyere blowpipe.

10. A state monitoring device for blast furnace tuyere blowpipe, It is characterized in that include: A data acquisition module, used to acquire a current internal image of the blast furnace tuyere blowpipe, a current hot blast temperature of the blast furnace tuyere blowpipe, and a current hot blast pressure of the blast furnace tuyere blowpipe; a standard image determination module, configured to determine the standard image corresponding to the current hot air temperature and the current hot air pressure according to the current hot air temperature and the current hot air pressure, and predetermined standard images corresponding to different preset hot air temperatures and different preset hot air pressures; A state determination module is used to determine the state of the blast furnace tuyere blowing pipe according to the current internal image and the standard image corresponding to the current hot blast temperature and the current hot blast pressure.

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