CN111020091B - Visual online measurement system and temperature measurement method for blast furnace molten iron flow - Google Patents
Visual online measurement system and temperature measurement method for blast furnace molten iron flow Download PDFInfo
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- CN111020091B CN111020091B CN201911326695.1A CN201911326695A CN111020091B CN 111020091 B CN111020091 B CN 111020091B CN 201911326695 A CN201911326695 A CN 201911326695A CN 111020091 B CN111020091 B CN 111020091B
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Abstract
The invention relates to a visual online measurement system and a temperature measurement method for blast furnace molten iron streams, belongs to the technical field of blast furnace iron making, and is used for solving the problem that the existing blast furnace molten iron temperature measurement technology does not have a visual continuous temperature measurement system. The measuring system comprises a probe, a holder, a signal conversion unit, a control unit, a display unit and a protective cover; the probe can collect video signals and temperature signals of molten iron streams at a molten iron opening in real time and send the collected video signals and temperature signals to the signal conversion unit; the signal conversion unit is used for converting and amplifying the video signal and transmitting the temperature signal and the video signal after conversion and amplification to the control unit; the control unit processes the transmitted temperature signal and the video signal and controls the display of the display unit and whether to send an instruction to the holder; the cradle head adjusts the probe according to the instruction of the control unit. The video and temperature measurement are integrated, and the universal continuous temperature measurement for long-term industrial application is realized by adopting non-contact measurement.
Description
Technical Field
The invention relates to the technical field of blast furnace iron making, in particular to the technical field of continuous temperature measurement of blast furnace molten iron, and particularly relates to a visual online measurement system and a temperature measurement method for blast furnace molten iron flow.
Background
The temperature of blast furnace molten iron is one of important indexes which need attention in blast furnace iron-making production and subsequent steel-making process. In the blast furnace ironmaking production process, the iron-containing materials are subjected to reduction reaction in the blast furnace to produce molten iron, and whether the heat of a hearth is abundant or not affects the production efficiency of the blast furnace. The temperature of materials in the hearth is difficult to measure directly, and technicians can judge the thermal state of the blast furnace hearth by detecting the temperature of the blast furnace molten iron at present so as to adjust the smelting parameters of the blast furnace and ensure that the molten iron has proper temperature and components in the subsequent process production process. At present, a handheld thermocouple is generally adopted for measuring temperature in blast furnace production, a measuring point is usually positioned in a small pit or an iron runner behind a main runner skimmer, and the measuring time is generally 2-3 times in each tapping process. The temperature measurement of the handheld thermocouple is difficult to avoid measurement result deviation caused by the difference of factors such as the position of an insertion point, the insertion depth, the time of temperature measurement and the like. Although various technologies utilize mechanical devices to limit the fixed point, depth and timing of the thermocouple for measuring the temperature of the molten iron, and reduce the measurement deviation, the devices are not industrially applied for a long time in the actual production of blast furnaces.
More process parameters need to be mastered in modern blast furnace operation, and the development trend of molten iron temperature measurement is towards automation and intellectualization, and the single-point temperature measurement is changed into continuous temperature measurement. In the existing blast furnace molten iron continuous temperature measurement technology, some blast furnace hearths are provided with carbon fiber temperature measurement devices, and the temperature of the blast furnace hearth molten iron is continuously measured within the first generation of furnace campaign, but the continuous temperature measurement devices can only be installed during the construction or overhaul of the blast furnace, and cannot be applied to the blast furnace in production; some support is erected beside the iron runner, and the temperature measuring pipe is inserted into the iron runner for continuous temperature measurement, but the device needs to be provided with a hole on the runner cover of the iron runner, so that the field operation is not influenced, equipment needs to be installed again every time tapping is carried out, the labor intensity is high, the use is inconvenient, the temperature of the runner cover is very high, and the equipment is very easy to damage; some temperature measuring devices are arranged at the top of the skimmer, the temperature of the skimmer is very high due to high-temperature radiation of molten iron, equipment arranged at the top of the skimmer is very easy to be damaged by baking, and the method still uses a thermocouple for plug-in temperature measurement and still belongs to intermittent temperature measurement.
In summary, in the existing blast furnace molten iron temperature measurement technology, a universal continuous temperature measurement technology capable of being industrially applied for a long time does not exist, and a visual measurement system combining continuous temperature measurement and video monitoring does not exist.
Disclosure of Invention
In view of the foregoing analysis, embodiments of the present invention provide a visual online measurement system and a temperature measurement method for a molten iron stream of a blast furnace, so as to solve the problem that the existing blast furnace molten iron temperature measurement technology has no visual continuous temperature measurement system.
On one hand, the invention provides a visual online measurement system for blast furnace molten iron flow, which comprises a probe, a holder, a signal conversion unit, a control unit, a display unit and a protective cover;
the probe can collect video signals and temperature signals of molten iron streams at a molten iron opening in real time and send the collected video signals and temperature signals to the signal conversion unit;
the signal conversion unit is used for converting and amplifying the video signal and transmitting the temperature signal and the video signal after conversion and amplification to the control unit;
the control unit processes the transmitted temperature signal and the converted and amplified video signal, controls the display unit to display the video and the temperature of the molten iron stream at the iron notch and judges whether to send an instruction to the holder or not;
the cradle head adjusts the angle of the probe according to the instruction of the control unit.
Further, the probe is blown by gas, the gas is nitrogen or deoiled and dehydrated compressed air, and the pressure of the gas is not less than 0.1 MPa.
Further, the measuring system adopts a non-contact temperature measuring instrument to measure the temperature of the molten iron.
Further, the protection casing is provided with the intermediate layer, set up insulation material in the intermediate layer.
Furthermore, the probe and the holder are respectively connected with the signal conversion unit.
Furthermore, the probe is arranged at the position around the iron notch of the blast furnace, the molten iron stream can be directly seen, the vertical distance between the installation position of the probe and the iron notch is 1-5 m, and the horizontal distance from the installation position of the probe to the iron notch is 4-20 m.
Further, the distance between the probe and the signal conversion unit is 1-10 m.
Furthermore, the probe is detachably connected with the holder, and the probe and the holder are arranged in the protective cover.
Further, the signal conversion unit can provide power for the probe and the holder.
On the other hand, the invention provides a blast furnace molten iron stream temperature measuring method, which adopts the measuring system to measure, and comprises the following steps:
the method comprises the following steps: collecting molten iron video and temperature data;
step two: adjusting the angle of the probe;
step three: and adjusting blast furnace smelting parameters according to the video and the temperature data.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
(1) the video signal and the temperature signal of the molten iron stream are collected in real time through the probe, the video signal and the temperature signal are displayed on the display unit through the control unit, and temperature measurement and the video are integrated, so that visual remote monitoring and continuous temperature measurement of the molten iron stream are realized, and the field labor intensity is reduced;
(2) the control unit controls the holder, and adjusts the angle of the probe according to the observation point position displayed in real time by the dynamic video of the measured molten iron stream so as to aim at the molten iron stream and ensure the accuracy of the measured data;
(3) the non-contact measurement of the molten iron stream is carried out through the probe, so that the problems of operation convenience and high temperature durability which are difficult to overcome by contact type measuring equipment are solved, the temperature measurement by a thermocouple does not need to be carried out manually after the infrared thermometer is calibrated, the labor intensity of stokehole workers is reduced, and meanwhile, the long-term application of the equipment in industrial production is realized;
(4) the probe is purged by nitrogen or compressed air, so that the purposes of dust removal and temperature reduction are achieved, the accuracy of a measurement result is further ensured, and long-term maintenance-free operation of equipment is realized;
(5) before the measurement system is put into industrial application, the temperature of the infrared thermometer is corrected, so that the accuracy of the measurement result is ensured;
(6) the temperature of the molten iron at the position of the blast furnace iron notch is acquired through the probe, so that the temperature drop error caused by mixing of newly-discharged molten iron and last-time slag iron reserved in the iron storage type main runner during measurement after the slag skimmer is avoided, and the accuracy of the measurement result is ensured.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic view of a system structure of a measurement system of the present invention applied to a double-taphole blast furnace;
FIG. 2 shows the video and temperature display effect of the measurement system of the present invention applied to a system of a double-taphole blast furnace.
Reference numerals:
1-a probe; 2-a tripod head; 3-a signal conversion unit; 4-a control unit; 5-a display unit; 6-protective cover.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.
Example one
The embodiment provides a visual online measurement system for blast furnace molten iron flow, as shown in fig. 1, comprising a probe 1, a holder 2, a signal conversion unit 3, a control unit 4, a display unit 5 and a protective cover 6; the probe 1 and the cradle head 2 are arranged in the protective cover 6, specifically, the probe 1 is detachably connected with the cradle head 2, and the cradle head 2 is detachably connected with the protective cover 6; the probe 1 and the cradle head 2 are respectively connected with the signal conversion unit 3, specifically, the probe 1 and the cradle head 2 are respectively connected with the signal conversion unit 3 through a special cable, and the special cable is a high-temperature-resistant and fast-plugging cable; the signal conversion unit 3, the control unit 4 and the display unit 5 are connected in sequence.
The probe 1 is used for acquiring a video signal and a temperature signal of a molten iron stream at an iron notch in real time and sending the acquired video signal and temperature signal to the signal conversion unit 3 in time; the signal conversion unit 3 converts and amplifies the video signal and transmits the temperature signal and the converted and amplified video signal to the control unit 4; the control unit 4 processes the temperature signal and the transmitted video signal after conversion and amplification, controls the display unit 5 to display the video and the temperature of the molten iron stream at the molten iron port and judges whether to send an instruction to the holder 2, and particularly, the display unit 5 displays the real-time video of the molten iron stream, the position of a measuring point, and the real-time temperature and temperature curve of the molten iron; the pan-tilt 2 adjusts the angle of the probe 1 according to the instruction of the control unit 4.
It should be noted that the probe 1 directly monitors the stream at the iron notch, collects the video signal and the temperature signal of the stream in real time, and sends the collected video signal and the collected temperature signal to the signal conversion unit 3 in real time. After receiving the video signal, the signal conversion unit 3 converts the unbalanced video baseband signal collected by the probe into a balanced video signal suitable for twisted pair transmission; since the attenuation of the high frequency part is relatively serious when the video signal is transmitted on the twisted pair, the signal conversion unit 3 amplifies the high frequency part in the video signal to compensate the attenuation of the video signal in the transmission process; the converted and amplified video signal is transmitted to the control unit 4 through the twisted pair. After receiving the temperature signal, the signal conversion unit 3 transfers the temperature signal to the terminal, and transmits the temperature signal to the control unit 4 through the twisted pair in an RS-422 or RS-485 data format. The pan-tilt control signal is transmitted to the signal conversion unit 3, transferred on the terminal, and transmitted to the control unit 4 through the twisted pair in the RS-485 data format. The control unit 4 processes the transmitted video signal, temperature signal and pan-tilt signal, and controls the display of the display unit 5 and judges whether to send an instruction to the pan-tilt 2, specifically, the display unit 5 displays a real-time video of molten iron flow, a position of a measuring point, a real-time temperature and temperature curve of molten iron, and judges whether to adjust the pan-tilt 2 according to the position of the measuring point, thereby adjusting the angle of the probe 1.
Considering that the temperature of the molten iron sprayed from the blast furnace taphole is the most direct embodiment of the thermal state of the hearth, the temperature at the position is directly measured and can represent the actual heat level of the hearth, the temperature drop error caused by mixing of newly-produced molten iron and last-time slag iron retained in the iron storage type main runner is avoided, and the accuracy of the measurement result is ensured.
It should be noted that when the temperature data collected by the probe 1 is greater than 1100 ℃ and lasts for more than 1 minute, tapping starts, and tapping start time is recorded; in the tapping process, measuring the temperature in real time, storing temperature values per minute, drawing a temperature curve and updating the tapping duration; when the temperature collected by the probe 1 is lower than 1300 ℃ and lasts for more than 3 minutes, tapping is finished, tapping finishing time is recorded, the total tapping time is counted, and the temperature curve of the whole tapping process is stored.
The position of the measuring point can be controlled by the cradle head 2 in an automatic mode to carry out remote visual adjustment so as to enable the cradle head to be aligned with the molten iron flow. When the automatic adjustment is started, the control unit 4 calculates the difference value between the RGB value of the current aiming area and the RGB value of the area where the target molten iron stream is located in real time, sends an instruction to the holder 2 according to the difference value control unit 4, moves the probe 1 to enable the measuring point to approach the molten iron stream, judges that the measuring point is aligned with the molten iron stream when the real-time calculated RGB value and the RGB value of the molten iron stream area reach the set conjunction degree, and finishes the automatic adjustment.
The proper place that can directly see the molten iron stream around the blast furnace taphole is installed to probe 1, specifically, probe 1 installs on the mud gun room outer wall near the blast furnace taphole, probe 1 can dismantle with cloud platform 2 and be connected, cloud platform 2 detachably installs in protection casing 6, protection casing 6 installs the place that can directly see the molten iron stream around the taphole, in order not to hinder on-the-spot workman to monitor the taphole and obtain accurate video signal and temperature signal, probe 1 is 1 ~ 5m apart from the vertical distance of taphole, the horizontal distance apart from the taphole is 4 ~ 20 m.
In order to ensure the long-term stable operation of the system in consideration of the ambient temperature near the taphole of the blast furnace, the probe 1 is connected with the signal conversion unit 3 through a high-temperature-resistant and fast-plugging cable, and the signal conversion unit 3 provides power for the probe 1 and the cradle head 2. Considering that the data signal is transmitted in an energy form during transmission, certain energy is lost by transmission materials, environmental factors and the like during transmission, the longer the distance, the more the loss is, and the more the loss is, the incomplete data or complete disappearance can be caused when the loss is enough, and in order to ensure the accuracy of the temperature measurement result, the distance between the probe 1 and the signal conversion unit 3 is set to be 1-10 m.
In order to realize the long-term operation maintenance-free of the probe 1, the probe 1 is purged by using gas, and the gas is nitrogen or deoiled and dehydrated compressed air. Specifically, a compressed air or nitrogen pipeline near a blast furnace taphole leads out one way to continuously sweep the probe 1, so that the dustproof and cooling effects are achieved. For the purpose of purging, the pressure of the gas is not less than 0.1 MPa. It should be noted that, in the service cycle of the blast furnace taphole, the purging gas is kept in an open state, when the blast furnace taphole is in a rest or/and maintenance period, the gas purging is closed, and the gas purging is opened when the blast furnace taphole is started next time, so that the long-term and proper gas purging is kept, and the long-term maintenance-free operation of the probe can be realized.
In order to prevent the protective cover 6 from rusting, reduce maintenance operation labor and reduce cost, the protective cover 6 is made of stainless steel, the protective cover 6 is provided with an interlayer, and a heat-insulating material is arranged in the interlayer, specifically, the heat-insulating material is aerogel felt, glass wool, rock wool or a Weina heat-insulating plate, so that the heat-insulating effect of the protective cover 6 is enhanced, and the probe 1 is further cooled; the protective cover 6 is provided with a gas cooling interface, and when the gas purging is not enough to meet the cooling requirement of the probe 1, the gas purging is adopted to purge and cool the probe 1 and the protective cover 6 simultaneously.
In the embodiment, the infrared thermometer or other non-contact thermometers are used for measuring the temperature of the molten iron, so that the problems of operational convenience and high temperature durability which are difficult to overcome by contact type measuring equipment are solved, the continuous measurement of the temperature of the molten iron is realized, and the method can be stably applied to industrial production for a long time.
A blast furnace molten iron stream temperature measuring method is used for measuring by using the measuring system provided by the embodiment of the invention, and comprises the following steps:
the method comprises the following steps: collecting molten iron video and temperature data;
the probe 1 collects video signals and temperature signals of molten iron streams in real time and transmits the collected signals to the signal conversion unit 3; the signal conversion unit 3 converts and amplifies the video signal and transmits the temperature signal and the converted and amplified video signal to the control unit 4;
the control unit 4 processes the temperature signal transmitted by the signal conversion unit 3 and the video signal after conversion and amplification, and the display unit 5 displays a real-time video of molten iron flow, the position of a measuring point, and a real-time temperature and temperature curve of molten iron;
step two: adjusting the angle of the probe;
when the automatic adjustment is started, the control unit 4 calculates the difference value between the RGB value of the current aiming area and the RGB value of the area where the target molten iron stream is located in real time, sends an instruction to the holder 2 according to the difference value control unit 4, moves the probe 1 to enable the measuring point to approach the molten iron stream, judges that the measuring point is aligned with the molten iron stream when the real-time calculated RGB value and the RGB value of the molten iron stream area reach the set conjunction degree, and finishes the automatic adjustment.
Step three: adjusting blast furnace smelting parameters according to the molten iron video and the temperature data;
when the iron flow is not smoothly discharged after opening, the opening is blocked and the secondary opening is performed in time; when the molten iron stream has large splashing, performing a plugging operation; when the temperature of the molten iron stream is lower than 1480 ℃ and the temperature curve is continuously reduced, indicating that the furnace temperature is in a descending trend, and adopting measures such as increasing the air temperature and the like to timely increase the furnace temperature; when the stream temperature of the molten iron is higher than 1520 ℃ and the curve is continuously increased, the furnace temperature is in an upward trend, measures such as increasing the blast humidity and the like are taken, and the furnace hearth is prevented from being overheated.
It should be noted that before the measurement system is used, the temperature of the infrared thermometer needs to be corrected, so as to ensure the accuracy of the measurement system result; acquiring the temperature of molten iron at the same position by using a high-precision thermocouple and a probe 1, comparing the temperatures, and setting temperature measurement parameters of an infrared measuring instrument according to the temperature comparison result; when the root mean square deviation between the temperature value measured by the probe 1 in real time and the measured value of the high-precision thermocouple is less than or equal to +/-5 ℃, the calibration work of the infrared thermometer is finished, and the method can be put into industrial application.
Example two
As shown in fig. 1-2, the present embodiment provides a specific implementation of the measurement system of the first embodiment to a two-taphole blast furnace.
1800m at home3This measurement system is used to two taphole blast furnaces, equipment layout is as shown in figure 1, probe 1 installs on near the taphole of blast furnace mud gun room outer wall, specifically, probe 1 can dismantle with cloud platform 2 and be connected, cloud platform 2 detachably installs in protection casing 6, protection casing 6 passes through expansion bolts and installs on the mud gun room outer wall, in order not to hinder on-the-spot workman to monitor the taphole and obtain accurate video signal and temperature signal, probe 1 is 2.0m apart from the taphole vertical distance, is 8.5m apart from the taphole horizontal distance. The signal conversion unit 3 is arranged near the probe 1, the distance is 5m, and power supply and signal transmission among the probe 1, the holder 2 and the signal conversion unit 3 are realized through high-temperature-resistant and quick-connection cables.
In order to prevent the protective cover 6 from rusting, reduce maintenance operation labor and reduce cost, the protective cover 6 is made of stainless steel, the protective cover 6 is provided with an interlayer, a heat insulation material is arranged in the interlayer, specifically, the heat insulation material is glass wool, the heat insulation effect of the protective cover 6 is enhanced, and the probe 1 is further cooled; a gas cooling interface is reserved on the protective cover 6, when gas purging is not enough to meet the cooling requirement of the probe 1, one path of gas is led out from a compressed air pipeline for nitrogen or deoiling and dehydrating, the probe 1 and the protective cover 6 are purged and cooled, and the pressure of purging gas connected into the probe 1 is 0.4 MPa.
In this embodiment, the principle of the measurement system is as follows: the probe 1 is used for acquiring a video signal and a temperature signal of a molten iron stream at an iron notch in real time and sending the acquired video signal and temperature signal to the signal conversion unit 3 in time; the cradle head 2 adjusts the angle of the probe 1 according to the instruction of the control unit 4; the signal conversion unit 3 converts and amplifies the video signal collected by the probe 1, and transmits the video signal and the temperature signal to the control unit 4 of the main control room through a signal cable, the control unit 4 controls the display unit 5 to display a real-time video of molten iron flow, a position of a measuring point, and a real-time temperature and temperature curve of molten iron, and simultaneously outputs a current temperature value through a 4-20mA standard signal. As shown in figure 2, the tapping time of the No. 1 western iron notch is 2019, 10, 19, 10:04:25, the duration time is 1 hour, 0 minute and 20 seconds, the current temperature is 1541 ℃, and the average temperature is 1536 ℃; the tapping time of the Dongtong iron notch 2# is 10 and 18 months in 2019 at a ratio of 9:47:54, the duration time is 0 hour, 4 minutes and 51 seconds, the tapping finishing time is 10 and 18 months in 2019 at a ratio of 9:52:56, the current temperature is 0 ℃, and the average temperature is 0 ℃.
In the embodiment, the temperature of the molten iron stream of the blast furnace is measured, and firstly, the video and temperature data of the molten iron stream are collected;
the probe 1 collects video signals and temperature signals of molten iron streams in real time and transmits the collected signals to the signal conversion unit 3; the signal conversion unit 3 converts and amplifies the video signal and transmits the temperature signal and the converted and amplified video signal to the control unit 4;
the control unit 4 processes the temperature signal transmitted by the signal conversion unit 3 and converts the amplified video signal, and the display unit 5 displays a real-time video of the molten iron flow, the position of a measuring point, and the real-time temperature and temperature curve of the molten iron.
Secondly, adjusting the angle of the probe;
when the automatic adjustment is started, the control unit 4 calculates the difference value between the RGB value of the current aiming area and the RGB value of the area where the target molten iron stream is located in real time, sends an instruction to the holder 2 according to the difference value control unit 4, moves the probe 1 to enable the measuring point to approach the molten iron stream, judges that the measuring point is aligned with the molten iron stream when the real-time calculated RGB value and the RGB value of the molten iron stream area reach the set conjunction degree, and finishes the automatic adjustment.
Thirdly, the temperature of the infrared thermometer is corrected, and the accuracy of the measurement system result is ensured;
acquiring the temperature of molten iron at the same position by using a high-precision thermocouple and a probe 1, comparing the temperatures, and setting temperature measurement parameters of an infrared measuring instrument according to the temperature comparison result; when the root mean square deviation between the temperature value measured by the probe 1 in real time and the measured value of the high-precision thermocouple is less than or equal to +/-5 ℃, the calibration work of the infrared thermometer is finished.
Finally, according to the molten iron video and the temperature data, adjusting blast furnace smelting parameters and keeping the stable production and smooth running of the blast furnace;
observing the tapping condition of the tap hole through a video, and blocking and opening secondarily in time when the tapping flow is not smoothly discharged after opening; when the molten iron stream has large splashing, performing a plugging operation;
through the change trend of the temperature curve of the blast furnace molten iron, the heat state of the furnace hearth is mastered, corresponding measures are taken according to the change of the heat state, and the stable operation of the blast furnace is ensured: when the temperature of the molten iron stream is lower than 1480 ℃ and the temperature curve is continuously reduced, indicating that the furnace temperature is in a descending trend, and adopting measures such as increasing the air temperature and the like to timely increase the furnace temperature; when the stream temperature of the molten iron is higher than 1520 ℃ and the temperature curve is continuously increased, the furnace temperature is in an upward trend, measures such as increasing the blast humidity and the like are taken, and the furnace hearth is prevented from being overheated.
In conclusion, the video signal and the temperature signal of molten iron are collected in real time through the probe, the video signal and the temperature signal are displayed on the display unit through the control unit, temperature measurement and video are integrated, the visualization of molten iron flow monitoring and the continuity of temperature measurement are realized, and the angle of the probe is automatically adjusted according to the position of an observation point displayed in real time by the dynamic video of the measured molten iron flow, so that the molten iron flow is aligned, and the accuracy of measured data is ensured; the non-contact measurement of the molten iron stream is carried out through the probe, so that the problems of operation convenience and high temperature durability which are difficult to overcome by contact type measuring equipment are solved, the temperature measurement by a thermocouple is not needed, and the labor intensity of stokehole workers is reduced; the probe is purged by nitrogen or compressed air, so that the purposes of dust removal and temperature reduction are achieved, and the accuracy of a measurement result is further ensured; before the measuring system is put into industrial application, the temperature of the infrared thermometer is corrected, and the accuracy of the measuring result is ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (7)
1. A visual online measurement system for blast furnace molten iron flow is characterized by comprising a probe (1), a cradle head (2), a signal conversion unit (3), a control unit (4), a display unit (5) and a protective cover (6); the probe (1) and the holder (2) are respectively connected with the signal conversion unit (3);
the probe (1) can collect video signals and temperature signals of molten iron streams at a molten iron hole in real time and send the collected video signals and temperature signals to the signal conversion unit (3);
the signal conversion unit (3) converts and amplifies the video signal and transmits the temperature signal and the converted and amplified video signal to the control unit (4);
the control unit (4) processes the transmitted temperature signal and the converted and amplified video signal, controls the display unit (5) to display a real-time video of the molten iron stream, the position of a measuring point, a real-time temperature and temperature curve of the molten iron and judges whether to send an instruction to the cloud deck (2) according to the position of the measuring point; the control unit (4) calculates the difference value between the RGB value of the current aiming area and the RGB value of the area where the target molten iron stream is located in real time, and sends an instruction to the holder (2) according to the difference value control unit (4);
the cradle head (2) adjusts the angle of the probe (1) according to the instruction of the control unit (4);
the probe (1) is detachably connected with the holder (2), and the probe (1) and the holder (2) are arranged in the protective cover (6); the protective cover (6) is provided with an interlayer, and a heat-insulating material is arranged in the interlayer; the protective cover (6) is provided with a gas cooling interface, and when the gas purging is not enough to meet the cooling requirement of the probe (1), the probe (1) and the protective cover (6) are purged and cooled simultaneously by adopting the gas purging.
2. The measuring system according to claim 1, characterized in that the probe (1) is purged with a gas, which is nitrogen or deoiled and dehydrated compressed air, the pressure of which is not less than 0.1 MPa.
3. The measuring system of claim 2, wherein the measuring system measures the temperature of the molten iron using a non-contact temperature measuring instrument.
4. The measuring system according to claim 1, wherein the probe (1) is installed at a position around a taphole of the blast furnace where molten iron flow can be directly seen, and the vertical distance between the probe (1) and the taphole is 1-5 m and the horizontal distance between the probe and the taphole is 4-20 m.
5. A measuring system according to claim 4, characterized in that the distance of the probe (1) from the signal conversion unit (3) is 1-10 m.
6. The measuring system according to claim 1, characterized in that the signal conversion unit (3) is capable of providing a power supply for the probe (1) and the head (2).
7. A method for measuring the temperature of a blast furnace molten iron stream by using the measuring system of any one of claims 1 to 6, wherein the method comprises the following steps:
the method comprises the following steps: collecting molten iron video and temperature data;
step two: adjusting the angle of the probe;
step three: and adjusting blast furnace smelting parameters according to the video and the temperature data.
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