KR200192136Y1 - Tutere auto water sprinkling device - Google Patents

Abstract

By detecting the breakage of the blast holes in the furnace at an early stage, and by spraying water with high pressure accurately on the damaged part, it rapidly cools and solidifies the red coke and the melt ejected from the furnace. The present invention relates to an automatic sprinkling device in case of breakage of a furnace that enables protection, and the present invention connects a watering line to each tuyere where a plurality of injection nozzles (5) are installed at the tip, and the amount of cooling water supplied to the tuyere. Built-in weather breakage detection program that detects wind breakage due to the difference in drainage and water supply temperature and the difference in water drainage temperature. It consisted of the automatic valve 3 installed.

Description

Automatic sprinkling device in case of blast furnace damage

1 is an explanatory diagram illustrating a watering state during breakage of a conventional furnace.

2 is an overall configuration diagram of the automatic watering device of the present invention.

3 (a), (b) is a partial cross-sectional view showing the installation state of the watering device of the present invention, and a perspective view of a portion thereof.

* Explanation of symbols for main parts of the drawings

10: Fenggu 11: tip junction

20: water supply pipe 21: water flow meter

22: water supply thermometer 30: drain pipe

31: drain flow meter 32: drain thermometer

40: watering pipe 41: watering nozzle

42: automatic valve 43: high pressure water pipe

50 control unit 100 inside the furnace

The present invention detects the breakage of the automatic water sprinkler, more specifically, the breakdown hole in the furnace in early stage, and precisely injects high pressure water into the damaged part to rapidly remove the red coke and melt from the furnace. The present invention relates to an automatic water sprinkling device in case of breakage of a blast furnace that can prevent large accidents and protect workers safely by cooling and solidifying.

In general, the hot air blowing required to reduce the iron ore in the furnace operation is blown through the tuyere. The tuyere is inserted into the furnace up to about 150-350mm for the purpose of delivering high temperature hot air to the interior of the furnace and to minimize the heat load on the furnace body of the part where the tuyere is inserted.

The tuyere is made of cupper and has a cooling water flow inside. In the case of large furnaces, there are generally about 40 vents in the case of large furnaces and about 25 vents in the small furnaces. However, the tuyere exposed inside the furnace is always in contact with the hot melt, which melts, and in the case of uneven dropping of the molten melt or intensive melting to a specific area, the tuyere cools down. As it exceeds, a blowhole breakage occurs.

In the case where the tuyere is damaged in this way, the conventional measures are performed by the worker 3 spraying the tuyere using the watering hose 2 around the tuyere as shown in FIG.

However, the conventional method for dealing with the damage to the windball damage has the following problems.

first; Since the worker has no choice but to detect the blowhole as the sparks are emitted from the blowhole, when the worker detects the blowhole, it is already up to the diameter of the blowhole. And the melt is rapidly solidified, and the ejection state cannot be prevented, leading to a large accident in the furnace called a tuyere.

second; Even if the worker finds breakdown damage and jumps to the storm hole and sprays it with the watering hose (2), the red coke and the melt (4) that are ejected are not able to approach the hole, so it is impossible to spray it at the correct position. Moreover, because of the large amount of steam generated when water 5 is sprinkled, it is impossible to keep water in the correct position because the field of view is not secured.

third; When water is sprinkled on the ejected coke and the melt, the molten water meets the water and causes a steam explosion, making it inaccessible.

The present invention has been devised to solve the various problems as described above, the purpose of which is to automatically detect the damage to windballs, fixed installation of the sprinkling device for each windball, and early detection of the damage to the windballs as well as the workers By sprinkling a large amount of water at high pressure by the automatic sprinkling device in the state without close to, cooling and solidifying the ejected red coke melt prevents large accidents such as the blowhole and can safely cope with the damage. It is to provide automatic watering device in case of blast furnace damage.

The present invention for achieving the above object is connected to the sprinkling line in each of the tuyere is installed a plurality of injection nozzle (5) at the tip, the difference between the water supply and drainage of the cooling water supplied to the tuyere and the water supply temperature and drainage temperature By the built-in windball damage detection program to detect the damage to the windball by the difference of the built-in control unit and the automatic valve (3) installed in each watering line to detect the damage to the windhole automatically It features.

Hereinafter, with reference to the accompanying drawings an automatic sprinkling device during breakage damage of the furnace of the present invention will be described in detail.

2 is an overall configuration diagram of the automatic sprinkling apparatus of the present invention, the air vent 10 for discharging hot air to protrude a portion of the tip into the interior of the furnace body 100, the cooling water in the front joint portion 11 thereof The inlet water pipe 20 and the drain pipe 30 through which the circulated coolant is discharged are connected.

On the outer circumferential surface of the tuyere 10, a watering pipe 40 having a plurality of nozzles 41 is fixed to the fastening portion 44 so as to spray water evenly on the tip joint portion 11, and this watering pipe ( On the pipe line 40, an automatic valve 42 for controlling the water supply of water supplied from the high-pressure water main pipe 43 is installed.

On the other hand, the water supply pipe 20 is provided with a water supply flow meter 21 for detecting the amount of water to be supplied and a water supply thermometer 22 for detecting the water supply temperature, respectively, the drain pipe 30 is discharged by circulating the vents 10 The drainage flowmeter 31 which detects the drainage amount of cooling water used, and the drainage thermometer 32 which detects the drainage temperature are provided, respectively.

The water supply and drainage flowmeters 21 and 31 and the water supply and drainage thermometers 22 and 32 are respectively input to the control unit 50 as signals, and the signals input to the control unit are compared with the set data according to the result of the examination. A signal for opening the automatic valve 42 mounted on the water pipe 40 is output.

3 (a), (b) is a view showing the watering device of the present invention, the plurality of watering nozzles 41 formed in the front end of the watering pipe 40 has a high frequency of damage of the tuyere 10 end junction 11 It is desirable to be located at.

Further, a plurality of watering nozzles 41 are formed in an annular shape so as to be distributed on the outer circumferential surface of the tip joint portion 11.

Figure 4 is a flow chart for controlling the watering device of the present invention, will be described along with the operating state of the watering device.

When the tuyere 13 is damaged due to internal and external factors during the discharge of hot air, the amount of cooling water drained is less than that of the water supplied because the cooling water entering the interior is partially lost into the furnace. At the same time, because the internal gas of the furnace leaks into the cooling water circulation path through the damaged part, the drainage temperature is higher than the water supply temperature.

The phenomenon of breakage of the tuyere is continuous to the signal control unit 11 detected and detected by the water flowmeter 21 installed in the water supply pipe 20 serving as the cooling water supply line of the tuyere and the drainage flowmeter 31 installed in the drainage pipe 30. The temperature of the cooling water of the tuyere is also detected by the temperature of the water supply pipe pipes installed in each of the water supply pipes 20 and 30 like the flow meter, and transmits the signal to the controller 11. In the control unit 11, if the difference between the water supply flow rate and the drainage flow rate exceeds the set value of the set data, or if the difference between the water supply temperature and the drainage temperature exceeds the set value of the set temperature, the blowhole breakage detection is first detected and a corresponding wind hole breakage alarm is issued. Provide to the operator. If the operator leaves the system afterwards, the emergency siren is activated and the water spray automatic valve (3) is opened while the emergency siren is operated as the supply / drainage flow rate difference of the cooling water or the supply / drainage temperature difference continues to exceed the control limit until after the set time. Watering is done. If the operator recognizes the primary weather breakage alarm and determines that a site inspection is necessary, the emergency stop switch of the system is operated and the system is suspended. However, if the operator then operates the system operation switch again, the system returns to the state before the emergency stop and spraying starts immediately. If the operator decides that the problem is caused by an abnormality in the flowmeter or the drainage thermometer as a result of the on-site inspection, the system will operate normally again.

Therefore, the present invention as described above can detect the damage to the windball early, the rapid cooling and cooling of the red coke and the melt that is ejected by intensively spraying a high pressure, a large amount of water to the exact location of the damage immediately after the breakage occurs. Coagulation is prevented to lead to leek.

In addition, there is an effect that can ensure the safety of the worker because the operator does not have to spray directly on the hot air spout of the hot coke and hot melt.

Claims (1)

A tuyere 10 for discharging hot air is installed in the interior of the blast furnace body 100 so that a part of the tip protrudes, and a water supply pipe 20 through which coolant flows into the front joint portion 11 and a drain pipe through which the circulated coolant is discharged ( 30 is connected to each other, the sprinkling pipe 40 is provided with a plurality of sprinkling nozzles 41 so as to spray water evenly on the tip junction portion 11 of the tuyere 10, and the pipe of the sprinkling pipe 40 An automatic valve 42 installed on the top to control whether water is supplied from the high pressure water pipe 43; The water supply flowmeter 21 for detecting the amount of water supplied and supplied to the water supply pipe 20, the water supply thermometer 22 for detecting the water supply temperature, and the drain pipe 30 are installed to circulate and discharge the air vent 10. A drain flow meter 31 for detecting a drainage amount of the cooling water to be used and a drain thermometer 32 for detecting the drain temperature; The automatic valve of the sprinkling pipe 40 is connected to the water supply / drainage flowmeters 21 and 31 and the water supply / drainage thermometers 22 and 32 by comparing and comparing the signals inputted therewith with the set data management values. 42. Automatic sprinkling device in case of breakthrough of the furnace, characterized in that it comprises a control unit (50) for outputting a signal to open.