KR20010060705A - Apparatus for injection dust of tuyere at blast furnace - Google Patents

Abstract

PURPOSE: A dust injecting apparatus of a blast furnace tuyere capable of reinjecting dust into a blast furnace through a coal dust line installed in the blast furnace by crushing dust in a storage tank to fine particles using nitrogen is provided, which prevents secondary water pollution, saves energy and reduces manufacturing cost. CONSTITUTION: The dust injecting apparatus of a blast furnace tuyere comprises a dust crushing tank(35) for supplying dust through valves(7)(8) and being connected to a dust storage tank(6) and installed with a balancing apparatus(13), a rotary motor(15) and a nitrogen filling line(10); and a control part(34) connected to the dust crushing tank and a dust transferring line(41), wherein the rotary motor for crushing installed inside the crushing tank is attached with a rotary blade in a body.

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 pressure device, a conveying device and a blowing device.

In general, there are four outlets, and one outlet is always opened to discharge the waste water to the outside of the furnace. At this time, the waste water is discharged to generate dust and dust.

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.

In the free dust hopper (Hopper), the heavy dust is first recharged by gravity sedimentation, and the remaining gas and fine dust are filtered on the outer peripheral surface of the bag installed inside the dry dust bag filter 3, and the filtered gas is Passed through and discharged to the atmosphere, dust is attached to the outer peripheral surface of the bag pulsating the air (Air) to drop into the conveyor belt (Conver Belt) (4), and the dust is transferred to the dust collection reservoir (5).

Conventionally, when a certain amount of dust accumulates in the reservoir, the truck 39 moves to the lower portion of the reservoir, and one cutting worker accurately controls the center of the truck and the reservoir hopper at the lower portion of the reservoir hopper 6, and then the pug mill 37 38) is operated to open or cross the reservoir valves 7 and 8 to perform dust cutting, and the extracted dust is moved to a predetermined place and stored.

However, in the above working 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 in close proximity to the operator. 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 using water and air (Air) to clean the secondary pollution and water pollution, and the work is made by hand, there is a problem that increases the 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 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 ... furnace

41 ... Dust transfer line 42 ... Dust blowing line

44 ... vibreta

The present invention is to improve the problem of the reservoir dust cutting operation, the technical configuration, the powdered coal line installed in the blast furnace by charging the dust reservoir hopper with nitrogen and crushing it with fine particles without manually cutting the dust of the reservoir. By providing a dust blowing device of the blast furnace tuyere re-injected into the furnace through.

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

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

The 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 is a pressure indicator 14 and a tank weighing meter 13. And install a pipe (10) capable of charging nitrogen and a valve (11) (12) to adjust the supply amount of nitrogen.

In addition, a drain line 9a and a valve 9 are installed at an upper portion of the crushing tank 36 to control the pressure in the tank, and the dust reblowing apparatus is provided at two upper lines of the crushing tank 36. Blowing valves 17, 18 and 21 are attached to connect the dust collecting dust to the dust blowing storage 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.

As shown in Figs. 2 to 4, dust collected in each hood of the columnar passes through the existing filter bag (3) chamber, and the impurity dust is installed on the lower conveyor belt (Conver Belt) ( 4) (5).

Then, the transferred dust is accumulated in the dust collection tank (6), and when a certain amount of dust is accumulated in the reservoir (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 6, the dust cutoff valves 7 and 8 provided below the reservoir 6 are opened. When dust is accumulated in the dust collecting crushing tank 36, the dust weighing meter 13 installed in the crushing tank 36 is operated to give a signal to the control panel 34.

When the control panel 34 receives a signal of a predetermined level, the dust reservoir discharge valves 7 and 8 are closed, and at this time, a crushing rotary motor in which a rotary blade installed inside the crushing tank 36 is mounted. (15) is operated to break the coarse dust into fine particles for a certain time.

Then, when a predetermined time elapses, the control panel 34 stops the crushing rotary motor 15, and the dust transfer main valves 17, 18, 21 to transfer the dust to the blown storage tank 27. At the same time, the nitrogen line valves 10, 11 and 12 provided at the lower part of the crushing tank 36 are opened, and the dust which has become fine particles by the pressure is transferred to the blowing storage tank 27.

In addition, when a certain amount of dust is accumulated in the blow storage tank 27, the blow storage tank 27 level meter 26 supplies a signal to the control panel 34 so that the nitrogen valves 11 and 12 of the crushing tank 36 At the same time, the dust transfer main valves 17, 18 and 19 are closed to complete the transfer of the dust.

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

In addition, the dust transported to the dust blowing storage tank (27) (27a) is stored in the storage tank 27 is steam is blown through the steam blowing line 25 for a predetermined time to remove water.

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

Then, when a predetermined time elapses, the nitrogen charging valve 22 installed in the dust blowing storage tanks 27 and 27a opens to charge the storage tank, and when the pressure gauge 20 signals the control panel 34, the blowing valve 28 Open dust is blown into the blast furnace 33 through the existing pulverized coal transfer line 42 is used as a furnace auxiliary raw material.

When a predetermined level (lower limit value) is detected in the level meter 26 of the dust blowing storage tanks 27 and 27a, the control panel 34 is signaled so that the nitrogen filling valve 22 is closed, and the feed line valve 28 for blowing is applied. 31 is automatically closed.

In addition, the residual pressure of the blown storage tank 27 is maintained by the drain valve 23 is opened and the residual pressure is maintained at " 0 " state through the drain line 23a, and the drain valve 23 is closed. Return to the reblow 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 the 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 to the dust through the disconnection valves 7 and 8 of the dust reservoir 6, and a dust crushing tank in which a basis weight meter 13, a crushing rotary motor 15, and a nitrogen filling line 10 are installed. 35, It is connected through the dust crushing tank 35 and the dust transfer line 41, the bottom surface is connected through the blast furnace and the dust blowing line 42, the pressure drain line 24a, steam line 25 and nitrogen Blowing storage tank 27 is connected to the pressure line 22 integrally, The dust blowing device of the blast furnace, characterized in that it comprises a control panel 34 which is integrally connected to the valve for opening and closing the crushing tank 35 and the blow storage tank 27 is installed to open and close it. The blast furnace dust injection apparatus according to claim 1, wherein the crushing rotary motor (15) provided inside the crushing tank (36) is integrally mounted with a rotary blade.