KR100423437B1 - Apparatus for injection dust of tuyere at blast furnace - Google Patents

Abstract

The present invention relates to a blast furnace dust blowing device for re-injecting the dust generated in the blast furnace to be used as a raw material, the technical configuration of the blast furnace using nitrogen without manually cutting the dust of the storage tank The main idea is to charge the reservoir hopper and break it into fine particles and re-inject it into the blast furnace through the pulverized coal line installed in the blast furnace.

Description

Dust blowing device of blast furnace blast {APPARATUS FOR INJECTION DUST OF TUYERE AT BLAST FURNACE}

The present invention collects the dust (dust) generated in the blast furnace column facilities by the bag filter, which is a dust collecting device to store in a low tank and transport and discard the dust stored in the storage tank using a vehicle The present invention relates to a dust blowing device of a blast furnace vent that blows into a blast furnace by using a crushing charging device, a conveying device and a blowing device.

In general, blast furnaces have four outlets, and at one time, one outlet opens the waste water to the outside of the blast furnace, and when the waste water is discharged, dust and dust are generated.

In addition, a cover is installed at the upper part of the passageway (hereinafter, referred to as "tango") through which the water flows, and an inlet for inhaling dust and dust in a place (hereinafter referred to as "residential") where workers and various vehicles can pass through. Is installed.

The motor fan 1 of the dry dust collector is rotated to suck dust and dust generated at the exit port being drawn out through the suction port, and to be transported through the dust transfer pipe 2 composed of straight pipes and curved pipes.

And, in the free dust hopper (Hopper), the heavy dust is first recharged by gravity sedimentation, the remaining gas and fine dust is filtered on the outer peripheral surface of the bag installed inside the dry dust bag bag filter (3), the filtered gas is Passed through and discharged into the atmosphere, the dust pulsates the air attached to the outer peripheral surface of the bag to the conveyor belt (4), the dust is collected through the transfer line (5) dust collecting tank hopper Transfer to (6).

Conventionally, when a certain amount of dust is accumulated in the reservoir hopper 6, the truck 39 moves to the lower part of the reservoir so that one worker can accurately steer the center of the truck and the reservoir hopper from the lower part of the reservoir hopper 6. Then, the pug mills 37 and 38 are operated to open or cross the reservoir valves 7 and 8 to perform dust cutting, and the cut dust is moved to a predetermined place. Are kept.

However, in the above work method, the storage tank dust cutting operation is performed by hand, causing dust pollution to the air, causing facility pollution and environmental pollution, and checking the dust directly on the vehicle by the operator's eyes. In addition, since dust and dust are mixed into the body, there is a problem of avoiding work.

In addition, since the accumulated dust dropped to the lower part of the reservoir hopper is cleaned using water and air, secondary pollution and water pollution are caused, and since the work is performed by hand, there is a problem of increasing workload. .

The present invention is to improve the conventional problems as described above, its purpose is to prevent the leakage of dust to contribute to pollution prevention, as well as to prevent secondary pollution and water pollution, and to reconstruct the dust as a heat source It contributes to cost reduction by blowing, and it is to provide dust blowing device of blast furnace to make all work possible by unmanned operation and contribute to effective personnel management.

1 is a dust processing state diagram of a conventional blast furnace dust collecting device

Figure 2 is a perspective view showing a dust blowing device according to the present invention

Figure 3 is a schematic diagram showing a dust crushing apparatus according to the present invention

Figure 4 is a schematic diagram showing a blast furnace blowing apparatus of the dust according to the present invention

Explanation of symbols on the main parts of the drawings

1 ... dust collection motor pen 2 ... dust collection dust transfer line

3 ... backfill thread 4 ... dust transfer belt

13 Tank level gauge for dust crushing 14 Pressure gauge

20 ... Dust injection reservoir pressure gauge 22 ... Nitrogen filling valve

23 ... dust blown reservoir drain line 23a ... dust blown reservoir drain valve

28.Dust blowing valve 29 ... Blow pipe

32 ... drain valve 33 ... blast furnace

41 ... Dust conveying line 42 ... Dust blowing line

44 ... vibreta

As a technical configuration for achieving the above object, the present invention, in the dust collecting device of the blast furnace, the dust is supplied through an extraction valve connected to the dust reservoir hopper, the weighing meter and the crushing rotary motor, and nitrogen pressure Dust crushing tank is installed line; And a dust blowing storage tank connected to the dust crushing tank and a dust transfer line, the bottom of which is connected through a blast furnace and a dust blowing line, and connected to a pressure drain line, a steam line, and a nitrogen filling valve. And a control panel connected integrally with the valve for opening and closing the crushing tank and the blow storage tank so as to open and close the crushing tank and the blow storage tank.

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

As shown in detail in FIGS. 2 and 3, the dust collecting unit for re-blowing dust generated in the blast furnace 33 is dust-operated by the control panel 34 directly under the dust storage hopper 6. A cutoff valve (7) (8) is installed, and a dust collecting dust crushing tank (36) is connected to the lower part of the cutoff valve (7) (8).

The dust crushing tank 36 is a tank for crushing dust falling from the upper reservoir to have a certain particle size, and the dust crushing tank 36 includes a pressure indicator 14 and a tank weighing meter 13. ), And a nitrogen filling line (10) for charging nitrogen and a nitrogen filling valve (11) (12) for adjusting the nitrogen supply amount.

In addition, a drain line 9a and a valve 9 are provided on the upper part of the dust crushing tank 36 and the upper part of the dust crushing tank 36 is provided on the dust reblowing device. Blowing valves 17, 18, 21 are attached to the line, respectively, and the blast furnace dust collecting dust is connected to the dust blowing storage tank 27.

In addition, a control panel 34 for controlling all operations of the above apparatus is provided.

Referring to the operation of the present invention configured as described above are as follows.

2 to 4, the dust collected in each hood of the columnar passes through the filter bag (3) chamber installed in the past, the impurity dust is a conveyor belt (Conver Belt) installed at the bottom ( 4) is transferred to.

Then, the transferred dust is accumulated in the dust collection tank hopper 6, and when a certain amount of dust is accumulated in the storage hopper 6, the reservoir level meter 35 is operated to signal to the control panel 34.

Subsequently, when the control panel 34 receives a certain amount of level signal during the operation of the level gauge 35 of the reservoir hopper 6, the dust cutoff valves 7 and 8 provided below the reservoir hopper 6 are opened. When dust is accumulated in the dust collecting crushing tank 36, the dust weighing meter 13 installed in the dust crushing tank 36 is operated to give a signal to the control panel 34.

When the control panel 34 receives a predetermined level of signal, the cutting valves 7 and 8 of the dust storage tank hopper 6 are closed, and at this time, a rotary blade installed inside the dust crushing tank 36 ( The crushing rotary motor 15 to which the 16 is mounted is operated to crush the coarse dust into fine particles for a predetermined time.

Then, when a predetermined time elapses, the control panel 34 stops the crushing rotary motor 15, and the blow valve 17 of the dust transfer line 41 to transfer the dust to the blow storage tank 27 ( 18) (21) are opened and at the same time the nitrogen charge valves 11 and 12 of the nitrogen filling line 10 installed at the lower part of the dust crushing tank 36 are opened to blow in the dust that has become particulates by the pressure. Up to 27).

In addition, when a predetermined amount of dust is accumulated in the blow storage tank 27, the level meter 26 of the blow storage tank 27 supplies a signal to the control panel 34, so that the nitrogen filling valve 11 of the dust crushing tank 36 is discharged. 12 is closed, and at the same time, the blow valves 17 and 18 and 21 of the dust transfer line 41 are closed to complete the transfer of the dust.

Subsequently, when all the valves of the dust crushing tank 36 are closed, the control panel 34 signals and the drain valve 9 of the dust crushing tank 36 opens to maintain the residual pressure in the tank at " 0 " state. do.

In addition, the dust is transferred to the dust blow storage tank 27 is stored in the blow storage tank 27 in which steam is blown by the operation of the valve 25 of the steam blow line 24a for a predetermined time to remove the moisture.

Here, the steam of the blow storage tank 27 is controlled by a thermometer.

When a predetermined time elapses, the nitrogen charging valve 22 installed in the dust blowing storage tank 27 opens to charge the blowing storage tank 27, and when the pressure gauges 19 and 20 signal the control panel 34, the dust is discharged. Blowing valves 28 and 30 of the blowing line 42 are opened and dust is blown into the blast furnace 33 through the dust blowing line 42 and the brow pipe 29 to be used as blast furnace auxiliary raw materials.

When a certain level (lower limit value) is detected in the level meter 26 of the dust blowing storage tank 27, the control panel 34 is signaled to close the nitrogen pressure valve 22, and the dust blowing line 42 is blown in. The valves 28 and 30 are automatically closed.

In addition, the residual pressure of the blow storage tank 27 is the drain valve 23 is opened to maintain the residual pressure in the "0" state through the drain line (23a), the drain valve 23 is closed, the operation is finished and re- Return to blown state.

As described above, according to the dust blowing apparatus of the blast furnace windball according to the present invention, by collecting all the dust and re-injected into the blast furnace, it can contribute to the prevention of pollution as well as to prevent secondary pollution and water pollution.

And, by re-injecting dust as a heat source material, it contributes to cost reduction, all work is possible by unmanned operation, can contribute to effective personnel management, solves the evasion work avoiding phenomenon, and can use dust as an auxiliary raw material of blast furnace. There is an effect that can greatly contribute to savings and cost reduction.

Claims (2)

In the dust collector of the blast furnace, Dust is supplied through the isolation valves 7 and 8 connected to the dust reservoir hopper 6, and the dust crushing machine is provided with a weighing meter 13, a crushing rotary motor 15, and a nitrogen filling line 10. Tank 36; Wow, The dust crushing tank 36 and the dust transfer line 41 are connected, the bottom surface is connected through the blast furnace and the dust blowing line 42, the pressure drain line 23a and the steam line 24a and , The dust blowing storage tank 27 to which the nitrogen filling valve 22 is connected; And, A control panel 34 connected integrally with a valve for opening and closing the crushing tank 36 and the blown storage tank 27 and installed to open and close the crushing tank 36; Dust blowing device of the blast furnace tuyere, characterized in that configured to include The blast furnace dust blowing device according to claim 1, wherein a rotary blade (16) is integrally attached to the crushing rotary motor (15) provided inside the crushing tank (36).