JPH0379986A - Dust discharger for discharging discharge gas dust in main duct of air discharger for sintering machine - Google Patents

Abstract

PURPOSE:To discharge discharge gas dust in a main duct without interrupting sintering operation by composing a dust hopper in two stages of upper and lower stage dust hoppers, and disposing a damper in a coupler between the upper and lower hoppers. CONSTITUTION:Discharge gas dust 8 in a main duct 6 is dropped from the upper opening of an upper stage dust hopper 2, and retained in the hopper 2. In this case, dampers 4 and 5 are closed. The damper 4 is opened, and the dust 8 reserved in the hopper 2 is discharged into a lower stage dust hopper 3. In this case, the damper 5 is closed. The damper 5 is opened, the dust 8 stored in the hopper 3 is discharged to a dust reservoir. In this instance, the damper 4 is closed, and new dust 8 is started to be reserved in the hopper 2. Thus, since the one of the dampers 4, 5 is always closed, the hermetical seal of the duct 6 is always maintained, and the dust can be discharged without interruption of a sintering operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dust discharge device for discharging exhaust gas dust in a main duct of a sintering machine exhaust fan from the main duct.

[Prior Art] During sintering operation, exhaust gas is drawn into the wind box through the sintered layer and is discharged through a main duct by an exhaust fan. This exhaust gas contains a large amount of dust, and most of the exhaust gas dust is removed by dust removers disposed before and after the exhaust fan. A portion of the dust is discharged from the bottom of the main duct by a dust discharge device attached to the bottom of the main duct. The negative pressure inside the main duct during sintering operation is usually as high as 1800 to 2000 nm+Aq, and it is important that the main duct maintains its interior airtight.

FIG. 5 is a schematic side view showing an example of a sintering machine, and FIG. 6 is a schematic explanatory diagram showing an example of a conventional dust discharge device. As shown in the drawing, at the bottom of the main duct 6 of the sintering machine 7, a plurality of dust discharge devices 9 are disposed at predetermined intervals from each other in the longitudinal direction. 12 is a wind box, 13
is the main body of the sintering machine.

The dust discharge device 9 includes a dust hopper 10 and a damper 11 disposed at the lower end of the dust hopper 10. The upper end of the dust hopper 10 is attached to the bottom of the main duct 6. In order to ensure airtightness within the main duct 6, the dampers 11 are arranged in multiple layers, and the lower end of the damper 11 and the dust receiver are connected to the belt conveyor 14; during sintering operation. , the exhaust gas dust 8 in the main duct 6 falls into the dust hopper 10, and the fallen dust 8 accumulates in the dust hopper 10. And dust hopper 10
The dust 8 accumulated inside the damper 1 is removed when the sintering operation is interrupted.
By opening 1, the dust tray is placed on the belt conveyor 14.
is discharged.

[Problems to be Solved by the Invention] In order to discharge the dust 8 from the main duct 6 using the conventional dust discharge device 9, the sintering operation had to be interrupted, as described above. The reason for this is that the negative pressure in the main duct is high, making it impossible to discharge dust during sintering operations. By the dust discharge device 9. The operation of discharging the dust 8 by interrupting the sintering operation had to be carried out every time the dust capacity of the dust hopper 10 reached the allowable capacity. In the conventional example, once a week, 2
In some cases, this is done regularly for up to 3 hours.

However, periodically interrupting the sintering operation has the problem of reducing the efficiency of the sintering operation.

Therefore, an object of the present invention is to provide a dust discharge device capable of discharging the exhaust gas dust in the main duct without interrupting the sintering operation.

[Means for Solving the Problems] The present invention is installed at the bottom of the main duct of a sintering machine exhaust fan. A sintering machine exhaust system comprising a dust hopper for temporarily storing exhaust gas dust in the main duct, and a damper disposed at the lower end of the dust hopper for discharging the dust stored in the dust hopper. In a dust discharge device for discharging exhaust gas dust in a main duct of a wind blower, the dust hopper is arranged in two stages, including an upper dust hopper and a lower dust hopper, and the dust hopper is arranged in a connecting part between the upper dust hopper and the lower dust hopper. It is characterized by the arrangement of a damper.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic explanatory diagram showing one embodiment of the present invention. As shown in FIG. 1, a dust discharge device 1 of the present invention
consists of an upper dust hopper 2 and a lower dust hopper 3, a damper 4 disposed at a connection between the upper dust hopper 2 and the lower dust hopper 3, and a damper 5 disposed at the lower end of the lower dust hopper 3.

The upper dust hopper 2 is attached to the bottom of the main duct 6. The inner hole of the upper dust hopper 2 gradually becomes smaller toward the lower end, and the upper opening of the upper dust hopper 2 has a larger diameter than the lower opening. The lower dust hopper 3 has an upper end portion having an upper opening having the same diameter as the lower opening of the upper dust hopper 2, a central portion having an inner hole approximately the same diameter as the upper opening of the upper dust hopper 2, and a hole extending from the central portion to the lower end thereof. and a lower end portion in which the cross-sectional area of the inner hole gradually decreases.

The diameter of the lower opening of the lower dust hopper 3 is smaller than the diameter of the lower opening of the upper dust hopper 2.

[Function] FIGS. 2 to 4 are schematic explanatory diagrams showing the function of the dust discharge device of the present invention shown in the embodiment.

As shown in FIG. 2, the exhaust gas dust 8 in the main duct 6 falls from the upper opening of the upper dust hopper 2 and accumulates in the upper dust hopper 2. At this time, the damper 4 and the damper 5 are closed, and the airtightness of the main duct 6 is maintained.

Next, as shown in FIG. 3, the damper 4 is opened to discharge the dust 8 accumulated in the upper dust hopper 2 into the lower dust hopper 3. At this time, the damper 5 is closed,
The airtightness of the main duct 6 is maintained.

Next, as shown in FIG. 4, the damper 5 is opened and the dust 8 accumulated in the lower dust hopper 3 is removed from the dust receiver (
(not shown). At this time, the damper 4 is closed and the airtightness of the main duct 6 is maintained. Furthermore, at this time, new dust 8 has begun to accumulate in the upper dust hopper 2.

In this way, in the dust discharge device 1, at least one of the damper 4 or the damper 5 is always closed, so the airtightness of the main duct 6 is always maintained.
The negative pressure within the main duct 6 does not decrease during dust discharge. Therefore, dust can be discharged without interrupting the sintering operation.

The damper 4 may be configured to be heavier if it can maintain airtightness, but if it is insufficient to maintain airtightness,
It is preferable to have a multiplex configuration.

This also applies to the damper 5.

[Effects of the Invention] As explained above, according to the present invention, exhaust gas dust can be discharged from the main duct without interrupting the sintering operation, so the efficiency of the sintering operation is greatly improved, etc.
Industrially useful effects can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing one embodiment of the present invention, and FIG.
Figures 4 to 4 are schematic explanatory diagrams showing the operation of this invention, and Figure 5
The figure is a schematic side view showing one example of a sintering machine, and FIG. 6 is a schematic explanatory view showing the upper side of a conventional dust discharge device. 1... Dust discharge device, 2... Upper dust hopper, 3... Lower dust hopper, 4... Damper. 5... Damper, 6... Main duct, 7... Sintering machine, 8... Dust, 9... Dust discharge device, 10... Dust hopper, 11... Damper, 12... Wind box, 13... Sintering machine main body,

Claims (1)

[Claims] 1 Attached to the bottom of the main duct of the sintering machine exhaust fan,
A sintering machine exhaust system comprising a dust hopper for temporarily storing exhaust gas dust in the main duct, and a damper disposed at the lower end of the dust hopper for discharging the dust stored in the dust hopper. In a dust discharge device for discharging exhaust gas dust in a main duct of a wind blower, the dust hopper is configured in two stages, including an upper dust hopper and a lower dust hopper, and a damper is provided at a connecting portion between the upper dust hopper and the lower dust hopper. A dust discharge device for discharging exhaust gas dust in a main duct of a sintering machine exhaust fan, characterized in that: