KR100325100B1 - Apparatus for reducing dust of fuel and raw materials of blast furnace - Google Patents

Abstract

The present invention relates to a blast furnace fuel and raw material dust reduction device, in particular in the blast furnace fuel and raw material dust reduction device, the rubber driven by the pulley 20-1 while being installed between the belt conveyor (11, 13) Bellows guides 21 are attached to both side surfaces of the belt 20-2, and the guide belt in which the uneven jaw 23 and the partial uneven jaw 22 are alternately installed on the upper surface of the rubber belt 20-2. 20); A photosensor 32 installed on the belt conveyor 11 to detect the load of the soft and raw material 12 and to send it to the controller 40; Speed sensors 30-1, 30-3, and 30-2 which sense the driving of the belt conveyors 11 and 13 and the guide belt 20 and send them to the controller 40; A weight detection sensor (31-1, 31-2) installed at the lower portion of the belt conveyor (11, 13) to detect the transfer state of the soft and raw material (12) and to send it to the controller (40); Dust collecting dampers 19-1 and 18-1 which are respectively installed on the ore bins 14 and the screens 15, and automatically collect dust generated by the controller 40; Dust detection sensors (29-1, 29-2) installed at the upper portions of the ore bin (14) and the screen (15), respectively, for measuring the concentration of generated dust and sending it to the controller (40); The water spray pipes 5 and 6 are connected to the water spray pipes 5 and 6 connected to the water spray main pipe 7 provided with the automatic valves 7-1, and are opened and closed by the automatic valves 5-4 and 6-4. It relates to a blast furnace raw material dust reduction device, characterized in that consisting of a spraying section 35 to which the spray nozzles (5-5, 6-5) are attached to the upper end of.

Description

Fuel and raw material dust reduction device of blast furnace

The present invention relates to an apparatus for reducing pulverization of fuel and raw materials, and in particular, by controlling dust concentrations such as dust and mist generated during transport, storage, and screening of ore and coke, which are the fuel and raw materials to be charged in the blast furnace, to an appropriate level. The present invention relates to a blast furnace soft and raw material dust reduction device capable of preventing environmental pollution and improving the working environment.

In general, the blast furnace industry produces iron by reducing molten reaction by charging iron ore and coke into the furnace and blowing high temperature hot air from the furnace equipment into the furnace.

In this case, the fuel and raw materials charged into the blast furnace must be temporarily stored in the raw material storage tank of the blast furnace first, and then put into the ore bin (14) through belt conveyors (11, 13), and then again suitable. The screen 15 has a granularity and undergoes a process of basis weight as necessary in the basis weight hopper 17. In this process, a large amount of dust is leaked or scattered to the outside.

Therefore, in the past, the generation of dust was suppressed by spraying the soft and raw material 12 on the belt conveyor 13 through the spraying nozzle 10-2.

However, in the conventional dust reduction method, the dust of soft and raw materials 12 is released into the atmosphere due to the deterioration and failure of the passive dust dampers 19 and 18, which causes environmental pollution. As such, it is unreasonable that follow-up is at the discretion of the worker, which adds to the workload.

The present invention is to control the dust concentration of dust and mist generated during transport, storage, screen work or the like, ore and coke, which are the fuel and raw materials to be charged into the blast furnace, to control environmental pollution and improve the working environment. The purpose is to provide a soft and raw dust reduction device.

1 is a schematic diagram showing a fuel and raw material transportation facility of a blast furnace equipped with a conventional dust reduction device;

Figure 2 is a schematic diagram showing the fuel and raw material transportation equipment of the blast furnace equipped with a dust reduction device according to the present invention,

3 is a main part perspective view showing a guide belt of a soft and raw material dust reduction device of a blast furnace according to the present invention,

Figure 4 is a graph showing the relationship between the dust concentration before and after the application of the soft and raw material dust reduction device of the blast furnace according to the present invention,

5 is a flow chart showing the operation procedure of the blast furnace fuel, raw material dust reduction device according to the present invention.

<Description of the symbols used in the main parts of the drawing>

5,6: spray pipe 7: spray water main pipe 8: bypass line 10: spray pipe 10-2: spray nozzle 11: belt conveyor 12: soft and raw material 13: belt conveyor 14: ore bin 15: screen 16: belt conveyor 17: basis weight hopper 18, 19: manual dust damper 18-1, 19-1: automatic dust damper 20: guide belt 20-2: rubber belt 21: bellows guide 22: partial uneven jaw 23: uneven jaw 29-1, 29-2: Dust detection sensor 30-1,30-2,30-3: Speed sensor 31-1,31-2: Weight detection sensor 32: Photo sensor 40: Controller

In order to achieve the above object, the present invention is a blast furnace soft and raw material dust reduction device, the bellows guide is attached to both sides of the rubber belt driven by the pulley while being installed between the belt conveyor, the upper surface of the rubber belt A guide belt in which the uneven jaw and the partial uneven jaw are alternately installed; A photo sensor installed at an upper portion of the belt conveyor to detect a load of soft and raw materials and to send the same to a controller; A speed sensor which senses the driving of the belt conveyor and the guide belt and sends it to the controller; A weight detection sensor installed at a lower portion of the belt conveyor and detecting a transfer state of soft and raw materials and transmitting the same to the controller; A dust damper installed at an upper portion of the ore bin and the screen, respectively, for automatically collecting dust generated by the controller; A dust detection sensor installed at an upper portion of the ore bin and a screen and measuring the concentration of generated dust and transmitting the generated dust to the controller; The spraying pipe is connected to the spraying main pipe with the automatic valve installed, and provides a dust and raw material dust reduction device of the blast furnace, characterized in that the spray nozzle is attached to the top of the spraying pipe is opened and closed by the automatic valve, respectively. .

The configuration of the present invention will be described with reference to the drawings.

Figure 2 is a schematic diagram showing the fuel and raw material transport equipment of the blast furnace is equipped with a dust reduction device according to the present invention, Figure 3 is a main portion perspective view showing a guide belt of the blast furnace, raw material dust reduction device according to the present invention, 4 is a graph showing the relationship between before and after the application of the soft and raw material dust reduction device of the blast furnace according to the present invention, Figure 5 is a flow chart showing the operation sequence of the soft and raw material dust reduction device of the blast furnace according to the present invention.

In the guide belt 20 provided between the belt conveyors 11 and 13 installed up and down, the rubber belt 20-2 is wound around two pulleys 20-1, and the rubber belt 20-2 is The bellows guide 21 is installed at the height of 1/5 of the rubber belt width along the both ends, and the bellows guide is scattered or dropped from the soft and raw materials 12, dust and water sprayed on the rubber belt. This prevents the phenomenon.

The height of the semi-cylindrical uneven jaw 23, which is three times as large as the thickness of the rubber belt 20-2, is spaced apart from each other along the upper surface of the rubber belt 20-2 by a quarter of the width of the rubber belt. The partial uneven jaw 22 provided in the width direction and installed between the uneven jaw 23 is formed in a shape in which the middle portion is cut into a width 1/2 size of the rubber belt in the uneven jaw shape.

Therefore, the soft and raw material 12 loaded on the upper surface of the rubber belt 20-2 is perfectly mixed with the sprayed water sprayed from the spray nozzle 6-5 by the uneven jaw 23 and the partial uneven jaw 22. The dust is suppressed as much as possible.

In addition, the speed sensors 30-1, 30-2, and 30-3 installed on the tail pulleys of the belt conveyors 11, 20, and 13 respectively detect the driving of the belt and transmit the same to the controller 40.

On the other hand, the belt conveyor 11 installed on the upper portion of the guide belt 20 is provided with a photosensor 32 for detecting whether the lead and the raw material 12 are loaded on the upper portion, and the weight of the soft and raw materials loaded on the lower portion. The weight detection sensor 31-1 for detecting the pressure is installed.

In addition, the belt conveyor 13 installed at the lower portion of the guide belt 20 is provided with a weight detection sensor 31-2 capable of detecting the weight of the soft and raw material 12 loaded at the lower portion.

In addition, the ore bin 14 in which the soft and raw materials 12 of the belt conveyor 13 are dropped and granulated is provided with an automatic dust collecting damper 19-1 that is opened and closed by a controller 40 at an upper portion thereof. The dust detection sensor 29-1 is provided so as to be located opposite the 19-1), and the dust detection sensor 29-1 detects dust in the ore bin 14 and sends it to the controller 40. do.

At this time, the screen 15 connected to the ore bin 14 is vibrated to filter the soft and raw material 12 of the ore bin 14, wherein the dust generated is an automatic dust collection damper 29 opened by the controller 40. -2) is collected.

In addition, the soft and raw material 12 passing through the screen 15 is incorporated into the basis weight hopper 17. At this time, the dust generated from the basis weight hopper is detected by the dust detection sensor 29-1 installed on the upper portion of the basis weight hopper and It is sent to 40.

On the other hand, the spray nozzles 6-5, 5-5, which are installed to spray on the soft and raw materials 12 of the guide belt 20 and the belt conveyor 13, are attached to the top of the spray pipes 6 and 5, and the controller ( The amount of watering is controlled by the automatic sides 6-4, 5-4 connected to 40).

And the sprinkling water pipes 6 and 5, in which the manual valves 6-1, 6-2, 5-1 and 5-2 and the feedwater flowmeters 6-2 and 5-2, respectively, are installed in the sprinkling water main pipe 7 Is connected to, the sprinkler main pipe (7) is provided with an automatic valve (7-1) opened and closed by the controller (40).

Hereinafter will be described the operation of the present invention.

The selection switch of the controller 40 is automatically selected and pressing the start switch activates the belt conveyors 11, 20, and 13, and whether the belt conveyor is normally operated is the speed sensor 30-1, 30-2, 30-. It is detected by 3) and sent to the controller 40.

At this time, when the normal operation of the belt conveyors (11, 20, 13) is detected, the controller 40 has a fat level ratio, and the photoelectric sensor 32 and the weight detection sensor 31-1 are connected to the belt conveyor 11 by Informing the controller that the raw material 12 is loaded, the automatic valve 7-1 is automatically opened after the set time has elapsed.

Then, the automatic valve 6-4 is opened and water is sprayed on the upper portion of the soft and raw material 12 through the sprinkling nozzle 6-5, and the soft and raw material of the guide belt 20 is uneven jaw 23 and a portion thereof. The dust is effectively suppressed by the water sprayed from the spray nozzle 6-5 while being evenly mixed by the uneven jaw 22.

Here, the opening time of the automatic valve 6-4 is set by measuring the speed of the belt conveyor 11 on the arrival time of the soft and raw material 12 from the detection sensors 32 and 31-1 to the guide valve 20. , The amount of sprinkling can be set in accordance with the dust concentration detection value in the ore bin 14.

In addition, the lead and raw material 12 passing through the guide belt 20 is loaded on the belt conveyor 13, the soft and raw material transfer state is sent to the controller 40 by the weight detection sensor 31-2, the belt conveyor The soft and raw material 12 in (13) is dropped-filled into the ore bin 14.

At this time, the automatic dust damper 19-1 installed on the upper of the ore bin 14 is opened to collect dust generated when the soft and raw material 12 of the belt conveyor 13 falls to the ore bin 14. .

When the concentration of dust detected by the dust detection sensor 29-1 is increased above the set value input to the controller 40, the spray nozzle 5-5 is increased while increasing the amount of water sprayed from the spray nozzle 6-5. Second watering will be performed.

Meanwhile, the soft and raw materials 12 filled in the ore bin 14 are collected into the basis weight hopper 17 through the vibrating screen 15, and the dust generated at this time is collected by the automatic dust damper 18-1. , The dust concentration detected by the dust concentration sensor 29-2 is sent to the controller 40.

The present invention provides the effect of preventing dust generation as much as possible to prevent environmental pollution, and improve the productivity of the work.

Claims (1)

In blast furnace soft and raw material dust reduction device, The bellows guide 21 is attached to both sides of the rubber belt 20-2 driven by the pulley 20-1 while being installed between the belt conveyors 11 and 13, and the rubber belt 20-2. A guide belt 20 on which the uneven jaw 23 and the partial uneven jaw 22 are alternately installed on an upper surface of the guide belt 20; A photosensor 32 installed on the belt conveyor 11 to detect the load of the soft and raw material 12 and to send it to the controller 40; Speed sensors 30-1, 30-3, and 30-2 which sense the driving of the belt conveyors 11 and 13 and the guide belt 20 and send them to the controller 40; A weight detection sensor (31-1, 31-2) installed at the lower portion of the belt conveyor (11, 13) to detect the transfer state of the soft and raw material (12) and to send it to the controller (40); Dust collecting dampers 19-1 and 18-1 which are respectively installed on the ore bins 14 and the screens 15, and automatically collect dust generated by the controller 40; Dust detection sensors (29-1, 29-2) installed at the upper portions of the ore bin (14) and the screen (15), respectively, for measuring the concentration of generated dust and sending it to the controller (40); The water spray pipes 5 and 6 are connected to the water spray pipes 5 and 6 connected to the water spray main pipe 7 provided with the automatic valves 7-1, and are opened and closed by the automatic valves 5-4 and 6-4. The blast furnace, raw material dust reduction device, characterized in that consisting of a spraying portion 35 is attached to the spray nozzles (5-5, 6-5) at the top of the.

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