CN-121972645-A - Intelligent control method and intelligent control system for ladle dust removal

CN121972645ACN 121972645 ACN121972645 ACN 121972645ACN-121972645-A

Abstract

The invention relates to an intelligent control method and an intelligent control system for dust removal of a ladle, wherein the intelligent control method comprises the steps of identifying the state of the ladle in a tapping area of a blast furnace, determining whether the ladle moves in place, sending out an in-place signal as a first condition for starting a fan after the ladle moves in place, detecting the concentration of flue gas online, continuously detecting the concentration of flue gas at a position where the ladle is in place online after the ladle moves in place, sending out a wind speed real-time control command according to the concentration of flue gas as a second condition for starting the fan, and controlling the fan by automatically and dynamically controlling the rotating speed of a dust removal fan according to the wind speed real-time control command based on the first condition and the second condition in the production process so as to ensure that the concentration of flue gas is in a safe range. The invention realizes the on-demand control of the dust removal fan, not only greatly reduces the workload of site personnel, but also reduces the waste of electric resources of iron and steel enterprises, and is beneficial to prolonging the service life of the dust removal fan.

Inventors

HE CHUNLAI
OUYANG XI
WANG ZHONGLIAN
KUANG HONGFENG
BAI DECHUN
CHEN QIAN
LING ZHIHONG
ZHOU LINGYUN
HE XIN

Assignees

广东中南钢铁股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (8)

1. An intelligent control method for dust removal of a ladle is characterized by comprising the following steps: The method comprises the steps of identifying the state of a ladle in a tapping area of a blast furnace, determining whether the ladle moves in place, and sending out an in-place signal as a first condition for starting a fan after the ladle moves in place; The smoke concentration online detection, namely continuously online detecting the smoke concentration of the iron receiving position after determining that the iron ladle moves in place, and sending a wind speed real-time control instruction according to the smoke concentration to serve as a second condition for starting the fan; And controlling the fan, namely automatically and dynamically controlling the rotating speed of the dust removing fan according to the wind speed real-time control instruction based on the first condition and the second condition in the production process so as to ensure that the concentration of the flue gas is in a safe range.
2. The intelligent control method for ladle dust removal according to claim 1, wherein in the step of ladle in-place identification, whether the ladle moves in place is judged by a visual identification mode: the method comprises the steps that marks for identification are arranged on the side face of a ladle frame facing a railway line, the marks of each ladle are related to the ladle numbers of the ladle frame, and a shooting device is arranged in a blast furnace tapping area; And when the mark is identified and accords with a preset pack number, judging that the ladle moves in place, and sending out a signal in place.
3. The intelligent control method for ladle dust removal according to claim 2, wherein when analyzing the picture information, graying, noise reduction, contrast enhancement and perspective correction are performed on the acquired picture to eliminate part of interference, and then identification positions are accurately framed in the picture to identify the cut digital regions.
4. The ladle dust removal intelligent control method according to claim 1, wherein in the step of online detection of the flue gas concentration, a corresponding preset wind speed is obtained as a real-time control instruction according to the online monitored flue gas concentration.
5. The intelligent control method for ladle dust removal according to claim 4, wherein when the flue gas concentration is 0, the preset wind speed is 0, and the dust removal fan is not started; when the smoke concentration is more than or equal to 0 and less than or equal to 20 mg/m 3 and the smoke concentration maintaining time is more than or equal to the preset time t, the power corresponding to the preset wind speed is 0-15 Hz; When the smoke concentration is 20< 50 mg/m 3 and the smoke concentration maintaining time is more than or equal to the preset time t, the power corresponding to the preset wind speed is 15-50 Hz; When the smoke concentration is more than 50 mg/m 3 and the smoke concentration maintaining time is more than or equal to the preset time t, the power corresponding to the preset wind speed is more than 50Hz.
6. The intelligent control method for ladle dust removal as set forth in claim 5, wherein the preset time t is 20-60 s.
7. The ladle dust removal intelligent control method of claim 1, further comprising anomaly control; When the automatic control of the dust removing fan fails or is in an overhauling state, the dust removing fan is switched to be controlled manually, and the start and stop or the rotating speed of the dust removing fan are controlled directly and manually.
8. An intelligent control system for ladle dust removal, which is characterized by being suitable for the intelligent control method for ladle dust removal according to any one of claims 1-7, wherein the intelligent control system for ladle dust removal comprises a control module, and a ladle identification module, an online smoke detection module and a dust removal fan module which are connected with the control module; The ladle identification module comprises an industrial camera, wherein the visual field of the industrial camera is opposite to the iron receiving area and is used for identifying the marks on the side face of the ladle; the on-line detection smoke module comprises a smoke detection device which is arranged above the ladle dust hood or on the dust removal pipeline; The dust removal fan module comprises a dust removal fan and is arranged at the iron receiving position.

Description

Intelligent control method and intelligent control system for ladle dust removal Technical Field The invention relates to the technical field of metal smelting, in particular to an intelligent control method and an intelligent control system for ladle dust removal. Background In the blast furnace production, on-site operators need to timely discharge molten iron produced by smelting in a blast furnace body through a blast furnace tapping hole, the blast furnace molten iron passes through the tapping hole, a tapping main runner, a skimming device, a tap runner and a swinging tap nozzle and flows into a special container for containing molten iron, namely a ladle, so that blast furnace tapping is one of very important operation links, and in order to prevent dust emission of the ladle, a dust hood is required to be arranged above the ladle, and the dust hood timely pumps away smoke dust generated in the process of receiving the iron of the blast furnace ladle through a dust removing pipeline connected with a dust removing fan. At present, large blast furnaces are basically adopted for domestic blast furnaces (the furnace capacity of the blast furnaces is basically more than 1000m 3, more than 2 tapping holes are usually arranged), the whole iron ladle iron receiving operation time is more than 70% of the whole day time, in daily operation, when the blast furnace is started to receive iron, a blast furnace front operator starts iron ladle dust removal through a field button switch, and when the iron ladle iron receiving operation is finished, the iron ladle dust removal switch is closed. However, due to the great increase of the workload of on-site personnel, according to the traditional dust removal control method, the actual demands are difficult to meet. In actual production, in order to prevent the ladle dust emission, when the ladle is not in place yet, the ladle is started to remove dust, and furthermore, the ladle is directly set to be in a normally open state, and the dust removal fan is continuously started for 24 hours for a long time, so that a large amount of electric resource waste is caused, and the service life of the ladle dust removal fan is seriously influenced. Patent CN115111925A discloses an automatic control method and system for tapping dust removal fans based on ladle weight change, by arranging a weighing sensor on a ladle track, real-time monitoring the ladle weight change, the system automatically judges the tapping state (no ladle, pre-work, tapping and removal) according to the change, and automatically switches the control fans between three modes of standby, low-power pre-work and full-load operation to realize so-called 'dust removal on demand', however, in order to increase the iron-steel ratio, most iron and steel enterprises can choose to add scrap before the ladle receives iron, and the problem of dust emission cannot be effectively solved based on the scheme. Since scrap steel crushed aggregates added by the ladle are added before receiving iron, when the ladle is pulled to the iron receiving position of the bottom of the blast furnace, the weight of molten iron is not increased in the earlier stage, but the problems of smoke emission and dust emission still obviously exist, and at the moment, the fan is in a standby state or is switched to operate with low power according to instructions, which is obviously unsuitable. Therefore, the invention provides an intelligent control method and an intelligent control system for ladle dust removal, so as to solve the problems. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide the intelligent control method and the intelligent control system for the ladle dust removal, which realize the on-demand control of the dust removal fan, not only greatly reduce the workload of site personnel, but also reduce the waste of electric resources of iron and steel enterprises, and simultaneously are beneficial to prolonging the service life of the dust removal fan. The technical aim of the invention is realized by the following technical scheme: an intelligent control method for ladle dust removal comprises the following steps: The method comprises the steps of identifying the state of a ladle in a tapping area of a blast furnace, determining whether the ladle moves in place, and sending out an in-place signal as a first condition for starting a fan after the ladle moves in place; The smoke concentration online detection, namely continuously online detecting the smoke concentration of the iron receiving position after determining that the iron ladle moves in place, and sending a wind speed real-time control instruction according to the smoke concentration to serve as a second condition for starting the fan; And controlling the fan, namely automatically and dynamically controlling the rotating speed of the dust removing fan according to the wind speed real-time control instruction based on the first conditi