KR20020041060A - Automatic watering apparatus for blast furnace tuyere nozzle zone - Google Patents

Abstract

PURPOSE: An apparatus is provided which prevents temporary or long term stopping of blast furnace operation by promptly sensing noise due to abnormalities such as leak from blast furnace tuyere zone, and automatically spraying high pressure cooling water onto the concerned area and rapidly reducing an air amount at the same time. CONSTITUTION: The automatic watering apparatus for blast furnace tuyere zone comprises wireless microphones(12) which are adjacently installed inside each tuyere zones(10) of a blast furnace(1); a noise amplifier(14) amplifying the signals by receiving wireless signals transmitted from the radio microphones(12); an ECC part(16) simultaneously displaying on a screen whether the data are normal or not by converting the signals into data after receiving noise signals amplified in the noise amplifier(14) and displaying on the screen where the concerned tuyere(5) is located through lighting when the data are abnormal, and then generating warning sound through an alarm; a trending chart part(18) indicating the trends by charting consistently changing trends of the data displayed on the screen of the ECC; a PLC part(22) transmitting signals requiring emergency watering to the side of the valve controller(20) and promptly reducing an air amount on the basis of the signals at the same time; a valve controller(20) controlling opening or closing conditions an emergency watering flow control valve(26) for a certain period of time; and an emergency watering supply line(28) which is formed so as to supply high pressure cooling water through a plurality of nozzles in case that cooling water is transferred from a cooling water supply line(24).

Description

Automatic spraying device for blast-furnace preservation {AUTOMATIC WATERING APPARATUS FOR BLAST FURNACE TUYERE NOZZLE ZONE}

The present invention relates to an automatic water spray device for blast furnace zone, more specifically, in the wind zone located at a certain depth of the blast furnace body when the noise caused by the occurrence of abnormalities such as (LEAK) occurs quickly to detect the high pressure Blast furnace operation is temporarily or long-term interrupted by automatically spraying the cooling water and simultaneously performing an emergency blast to secure the minimum time required for the prevention of large-scale equipment accidents such as wind tunnels and emergency blast. The present invention relates to an automatic spraying device for blast-furnace to prevent back light.

In general, the blast furnace operation is charged with ore and coke having a constant particle size from the top of the blast furnace, as shown in Figure 6 and 7, and is formed to take equal intervals in the circumferential direction in the lower part of the blast furnace body (2). The LBP (4), which is connected to the 34 vents (5), supplies the hot air at a high temperature (approximately 1200 ° C) uniformly and burns coke as the heat to melt the ore. do.

Since the tuyere 5 in such a blast furnace 1 is normally located in the last end part of a ventilation system, it is manufactured with pure copper with high thermal conductivity and low melting point.

This air port will be described in detail with reference to the drawings.

Fig. 5 is a front view showing an excerpt of a blast furnace configuration of a conventional blast furnace.

As shown, the hot air delivered through the LBP (4) installed in the rear end connected to the inner diameter of the front end of the large air vent (3) which is located at a constant depth on the basis of the blast furnace body 2 (1) The tuyere 5 is formed so that it can blow into the inside.

However, the tuyere constructed as such is caused the following problems due to the characteristics of the installation site during operation.

This will be described in detail based on the order as follows.

First, the tip of the tuyere that is in contact with the furnace during operation and its surroundings are areas where fluctuations due to blowing pressure and fast flow rate are concentrated. SLIP) and Hanging) frequently cause problems such as melt damage and heat deformation in the air vents close to the melt, causing high temperature hot air to reach the air vent zone where LBP and air vents come into contact. Phenomena, and the occasional occurrence of large-scale equipment accidents, such as the so-called “balloon leeks,” which eject hot melt through the melted areas, causing the blast furnace operation to be suspended or completely stopped.

Second, as described above in the Punggu Zone during the daily operation, in the event of an unexpected situation such as Punggu Great Wave, the emergency raking operation that has to descend from 3000Nm3 to 3,000Nm3 of the air supplied to the blast furnace in the normal operation process, and the rapid rise of the molten lava in the furnace due to the gusts Work to close the flow path through the blow system through the blow system and take out the work to prevent the melt in the furnace from being discharged from the air hole zone through the abnormal outlet, that is, the melted air vent. The operation that needs to be strengthened and the operation that requires several workers to perform intensive or precise monitoring work for 34 hours around the wind hole should be carried out quickly, thus causing problems for workers in taking countermeasures. Caused it,

Third, it is located in the sub-noise area where noise above a certain decibel (dB) always exists, that is, in the lower area of the facility where high pressure oxygen, nitrogen, cold wind, and pulverized coal injection are always blown. In the conventional safety inspection method taken, in fact, defects such as fine racks were not found, causing problems such as being unable to effectively cope with the problems such as the above-mentioned wind tunnel.

The present invention is to improve the various problems described above, the purpose is to quickly detect the noise caused by the occurrence of abnormalities such as (LEAK) in the blast furnace zone located at a certain depth of the body of the blast furnace to the corresponding area The operation of the blast furnace is temporarily or long-term interrupted by automatically spraying high-pressure cooling water and simultaneously performing emergency blasting to secure the minimum amount of time necessary for the prevention of large-scale equipment accidents and emergency blasts. It is to provide an automatic water spray device for blast furnace zone to prevent the lamp in advance.

The above object, in the noise detection device for blast furnace zone, a wireless microphone that is fixedly installed in each blast zone of the blast furnace to continuously detect the noise generated in this area to transmit as a wireless signal; A noise amplifier configured to receive a wireless signal transmitted from the wireless microphone and to amplify the signal by a predetermined amount; The noise amplifier amplified by a certain amount of the noise signal is connected and installed, but this signal to the data (DATA) to display the presence of an abnormality on the screen and at the same time when the location of the corresponding vents by lighting up An ECC unit displaying on the screen and also generating an alarm sound through an alarm to convey such a situation to an operator; A trending chart unit for charting and displaying a continuously changing trend so as to monitor the screen displayed by the E.C.C unit; Connected to receive the noise signal amplified by a certain amount from the noise amplifier, based on the signal characteristics of the noise or noise around the wind zone zone or abnormal phenomenon such as (LEAK) occurs in the wind zone A PLC unit which detects whether an abnormal symptom of the noise is occurring and transmits a signal for emergency sprinkling to the valve controller and controls to perform an emergency gust in parallel based on the signal; It is connected to receive the signal transmitted from the PLC unit, but based on this signal emergency sprinkling which is connected to adjust the amount of cooling water supplied to the cooling water supply line connected to the wind hole zone, which is an abnormal starting point A valve controller for controlling the opening / closing state of the flow regulating valve for a predetermined time; It is connected to the cooling water supply line, but is installed to be coupled to the outer diameter of the LBP connected immediately after the air outlet zone so that the high pressure cooling water can be sprayed through a plurality of nozzles when the cooling water is transferred from the cooling water supply line. It can be achieved by providing an automatic spraying device for blast furnace airflow including an emergency spraying supply line.

1 is a front view schematically showing the overall configuration of the blast furnace airflow zone automatic spraying device according to the present invention,

Figure 2 is a front view showing the excerpt configuration state of the automatic water spray device for blast furnace airflow zone according to the present invention,

Figure 3 is a schematic diagram showing the excerpts of the constituent state of the automatic water spray device for blast furnace zone according to the present invention,

Figure 4 is a flow chart illustrating the operation of the automatic spraying device for blast furnace zone according to the present invention,

5 is a front view showing an excerpt configuration of a blast furnace configuration of a conventional blast furnace

Figure 6 is a schematic diagram showing a blowing system of a typical blast furnace,

Figure 7 is a schematic diagram showing a state in which a general blowhole sprinkling water is applied.

<Description of the symbols for the main parts of the drawings>

1: blast furnace 2: blast furnace body

3: Daegong-gu 4: L.B.P (LOW BLOW PIPE)

5: balloon 10: balloon zone

12: Wireless microphone (WIRELESS MICRO PHONE)

14: NOISE AMPLIFIER

16: E.C.C Department

18: trend charting part

20: VALVE CONTROLLER

22: P.L.C part (PROGRAMMABLE LOGIC CONTROLLER)

24: cooling water supply line

26: emergency spray flow control valve (MOTORISED VALVE)

28: emergency water supply line 30: nozzle (NOZZLE)

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view schematically showing the overall configuration of the automatic blast furnace sprinkler apparatus for spraying blast furnace zone according to the present invention, Figure 2 is a front view showing the main configuration of the blast furnace automatic sprinkler apparatus for sprinkling zone according to the present invention, Figure 3 is a schematic diagram showing the main portion of the constituent state of the automatic water spray device for blast furnace airflow zone according to the present invention.

As shown, the wireless microphone 12 is fixedly installed at an adjacent portion of the tuyere zone 10 located at a predetermined depth of the blast furnace body 2.

In addition, a predetermined portion of the blast furnace main body 2 is provided with a noise amplifier 14 for receiving a noise signal detected by the wireless microphone 12 and amplifying the signal by a predetermined amount.

And, in the cab (not shown) in the cab located near the blast furnace (1) receives a noise signal amplified by a certain amount from the noise amplifier 14, the presence or absence of abnormality in the wind sphere (10) during operation based on this signal And the ECC unit 16 for displaying data on the screen and displaying the contents such as noise generated in the wind zone 10 of the site, and the screen displayed by the ECC unit 16. Is installed and connected to monitor the trending chart portion 18 to continuously display the chart to change the trend of the wind sphere (10) is installed, the noise amplified by a predetermined amount by the noise amplifier 14 It is connected and installed to receive a signal. Based on this signal, it is a noise phenomenon generated around the air vent zone 10 due to the characteristics of the facility or a noise phenomenon caused by abnormal phenomenon such as a rack in the air vent zone 10. PLC unit 22 that detects abnormal signs of recognition by itself and transmits a signal requiring emergency watering to the valve controller 20 side, and performs control to quickly and concurrently perform an emergency sensation based on this signal. ) Is installed.

In addition, the adjacent position of the PLC unit 22 is connected to be installed so as to receive a signal transmitted from the PLC unit 22, based on this signal is installed and connected to the wind ball zone 10, which is an abnormal starting point The valve controller 20 is installed to control the opening and closing state of the emergency sprinkling flow rate control valve 26 that is connected to adjust the amount of cooling water supplied to the cooling water supply line 24 for a predetermined time,

When the coolant is delivered from the coolant supply line 24 to the outer diameter of the LBP 4 which is connected to receive the coolant through the coolant supply line 24, the high pressure coolant is supplied through a plurality of nozzles 30. Emergency sprinkling supply line 32 is configured to be connected to the water spray zone (10).

When described in detail with reference to the operation of the present invention configured as described above and the action that appears according to the drawings as follows.

Figure 4 is a flow chart illustrating the operation of the automatic spraying device for blast furnace zone according to the present invention.

The present invention is to detect the noise of each air vent zone (10) through the high-performance wireless microphone 12 is fixed to each of the 34 air vent zone (10) when performing the blast furnace operation in the furnace phenomena during the operation of the blast furnace operation Due to this, if the melting loss and heat deformation occur in a particular part of the mouth (5), the wireless microphone 12 located in the corresponding mouth zone (10) inevitably radiates an abnormal noise based on this detection signal It is to allow the high pressure cooling water to be automatically sprayed on the generated wind zone 10, and at the same time to carry out an emergency sensation.

This will be described in more detail as follows.

First, when a routine operation is performed, the high-performance wireless microphone 12 fixed to each of the 34 air vent zones 10 as described above measures the noise of each air vent zone 10 to make a noise amplifier 14. The noise amplifier 14 receives the noise signal and transmits the signal to the ECC unit 16 by uniformly amplifying the signal by a predetermined amount based on the detected noise index. The ECC unit 16 converts this signal into data and displays it on the screen so that the operator can visually check whether there is an abnormality in each tuyere 5 during operation.

Therefore, it is possible not only to predict the operation situation in advance, but also to save and manage the data for effective operation.

In addition, when abnormal operation proceeds due to the internal furnace abnormality and the melting and thermal deformation occurs in a specific wind hole (5), the wireless microphone 12 located in the wind hole zone 10 inevitably diverges. The abnormal noise is detected and the signal is transmitted to the noise amplifier 14.

The noise amplifier 14, which receives the abnormal noise signal, amplifies the signal uniformly by a predetermined amount on the basis of the detected noise index and transmits the signal to the ECC unit 16. The ECC receives such a signal. The unit 16 converts this signal into data to indicate whether there is an abnormality on the screen, and at the same time, when the abnormality occurs, the corresponding air vent 5 is displayed on the screen through lighting, and an alarm sound is generated through an alarm. This situation is communicated to the worker.

At this time, the trending chart unit 18 charts and displays the continuously changing trend so that the screen displayed by the E.C.C unit 16 can be monitored.

At the same time, in the PLC unit 22 which receives the above-described amplified signal through the noise amplifier 14, whether it is a noise phenomenon generated around the air port zone 10 due to the characteristics of the facility or the rack in the air hole zone 10. Whether the abnormal phenomenon such as the noise phenomenon caused by the occurrence of the abnormal noise index, that is, based on the noise generated during the "shortly before the wind blast" or "wind blast wave", the corresponding wind blast ( 5) the control to transmit the signal to the valve controller 20 to take emergency water to cope with the above, and at the same time to perform the emergency wind blowing in parallel based on this signal.

The valve controller 20, which receives such a signal, opens the emergency water flow rate control valve 26 for a predetermined time based on this signal so that the coolant is supplied to the nozzle 30 located at the corresponding tuyere 5. Make watering work possible.

During the watering operation, the continuous change is observed through the ECC unit 16 and the trending chart unit 18, and when the noise level is determined to be lower than the reference value, the PLC unit 22 judges itself and makes an emergency. Sending a signal to stop the sprinkling to the valve controller 20 to turn off the corresponding sprinkling flow control valve 26 to stop the sprinkling to end the situation.

On the other hand, after such a situation is completed, the blast furnace stabilization operation is performed while continuously observing the change trend during the operation.

Therefore, when performing blast furnace operation, it is possible to effectively prevent accidents such as large-scale equipment accidents, and to secure the minimum time required for urgent gusts. It is possible to achieve the action to prevent.

In addition, by responding to the sudden situation through a series of automated processes, it is possible to improve the convenience of the operator, and at the same time, it is possible to precisely and quickly perform a safety check for observing abnormalities in the windball. It is possible to achieve the action to achieve.

For reference, since the automatic sprinkling apparatus for blast furnace airflow zone shown and described for explaining the present invention shows only a basic form as an example, the present invention provides another type of blast furnace airflow zone sprinkling system having a similar form and purpose. It can basically include.

This is because those skilled in the art can readily recognize that the present invention can be variously modified and changed without departing from the technical spirit or field of the present invention provided by the following claims. .

As described above, the present invention, when the noise caused by the occurrence of abnormalities such as the rack (LEAK) occurs in the blast furnace zone located at a certain depth of the blast furnace body to detect this quickly and to automatically spray high-pressure cooling water to the corresponding area and At the same time, emergency gusts can be carried out in parallel to prevent large-scale equipment accidents called Pung-gu Daepar and secure minimum time for emergency gusts. As a result, it is possible to minimize the economic loss caused by an accident during operation and to improve the safety of the worker, and also to respond to the accident through a series of automated processes. This can be done quickly to improve operator convenience. The effect is effective, such as to make the safety check to observe the abnormality of the windball accurately and quickly and easily.

Claims (1)

In the blast furnace wind noise detection device, A wireless microphone 12 fixedly installed in each of the blast furnace zones 10 of the blast furnace 1 so as to continuously detect noise generated in this area and transmit it as a wireless signal; A noise amplifier 14 configured to receive a wireless signal transmitted from the wireless microphone 12 and to amplify the signal by a predetermined amount; The noise amplifier 14 is connected so as to receive the noise signal amplified by a predetermined amount, and the signal to the data (DATA) to display the presence of an abnormality on the screen and at the same time when the abnormality of the wind hole (5) An ECC unit 16 which displays a position on the screen through lighting and also generates an alarm sound through an alarm to convey such a situation to an operator; A trending chart unit 18 for charting and displaying continuously changing trends so that the screen displayed by the E.C.C unit 16 can be monitored; The noise amplifier 14 is installed so as to receive a noise signal amplified by a predetermined amount, and based on the signal characteristic of the noise phenomenon generated around the air vent zone 10 or rack (in the air vent zone 10). LEAK) detects the abnormality of the noise phenomenon such as the occurrence of abnormality such as LEAK by itself and transmits the signal for emergency sprinkling to the valve controller 20 side. A PLC unit 22 for applying control to perform in parallel; Is connected and installed so as to receive a signal transmitted from the PLC unit 22, the amount of coolant supplied to the cooling water supply line 24 is connected to the installation of the wind sphere zone 10, the abnormal starting point based on this signal A valve controller 20 for controlling the opening and closing state of the emergency sprinkling flow rate control valve 26 that is connected to be adjusted for a predetermined time; Is installed in connection with the cooling water supply line 24, coupled to the outer diameter of the LBP (30) is connected to the immediately installed end of the air outlet zone (10) when a plurality of cooling water is delivered from the cooling water supply line (24) Automatic spraying device for blast furnace zone, characterized in that it comprises an emergency spraying supply line 28 is formed so as to spray the high pressure cooling water through the nozzle (30).