KR101009021B1 - Apparatus for cleaning distributor in fluidized bed reduction furnace - Google Patents

Abstract

The object of the present invention is to enable easy cleaning of the dispersion plate even in a harsh working environment such as high temperature, thereby reducing the operation rate of the flow reduction process and the operator's gas according to the time required for cooling and restarting as the worker enters the reduction furnace. It is to provide a fluidized-bed reduction path to prevent safety accidents such as addiction.

Accordingly, the present invention is provided between the suction header and suction tube connected to the suction header and suction tube for suctioning and removing the spectroscopic and foreign matter accumulated in the dispersion plate nozzle, the suction tube and the suction tube along a predetermined interval to rotate the suction tube and the suction tube. It is possible to provide a swivel joint, a swivel joint, and the distribution plate cleaning device for a fluidized bed reduction furnace including a drive unit for moving the suction header by bending each suction pipe with respect to the swivel joint.

Swivel Joint, Pipe Header, Suction Tube, Drive Cylinder, Wire

Description

Apparatus for cleaning distributor in fluidized bed reduction furnace}

1 is a schematic diagram showing a molten iron manufacturing process through a typical fluidized bed reduction line,

Figure 2 is a schematic cross-sectional view showing the inner dispersion plate of a typical fluidized bed reduction furnace,

3 is a schematic configuration diagram showing an apparatus for cleaning a dispersion plate of a fluidized bed reduction furnace according to an embodiment of the present invention;

4 is a partial cross-sectional view of FIG. 3 in accordance with an embodiment of the present invention;

5 is a partial side cross-sectional view of FIG. 3 in accordance with an embodiment of the present invention;

Figure 6 is a side cross-sectional view showing an operating state of the dispersion plate cleaning apparatus according to an embodiment of the present invention,

7 is a plan view showing an operating state of the dispersion plate cleaning apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50: heading header 60: swivel joint

61: Out Slider 62: Inner Slider

63: communication hole 64: flow hole                 

65: packing 66: rotating shaft

70: suction pipe 80: operation bar

81: wire 82: drive cylinder

The present invention relates to a flow reduction facility of a molten iron production equipment for producing molten iron by putting the iron ore and coal to directly into the fluidized-bed reduction reactor (reactor) and gasifier without a separate sintering operation. More specifically, the present invention relates to a dispersion plate cleaning apparatus for a fluidized bed reduction reactor, in which a dispersion plate nozzle part installed inside the fluidized bed reduction path is clogged by foreign substances such as dust generated during manufacturing of molten iron or by spectroscopy. It is about.

In general, the blast furnace method, which constitutes a large scale of molten iron production equipment, requires a raw material having a certain level of strength and a particle size that can ensure the ventilation of the furnace.

Therefore, the carbon source used as fuel and reducing agent depends on coke processed with most of the raw coal, and the iron source mainly depends on the sintered ore through a series of bulking processes.

Therefore, the current blast furnace method using the above coke and sintered ore requires raw material pretreatment equipment such as coke manufacturing equipment and sintering equipment, and therefore requires a huge cost for the production of the equipment, repair and maintenance thereof. In addition to the work involved, since such raw material pretreatment facilities considerably generate environmental pollutants such as SOx, NOxe or dust, a separate facility for the purification treatment is required, and in particular, the global pollution Due to the stricter regulations on Korea, the production of charterers through the blast furnace process is undermining its competitiveness due to enormous investment in treatment facilities.

In order to solve the problems caused by the blast furnace process, there were many other researches and developments. In the steelmaking process currently being developed, general coal is directly used as fuel and reducing agent, and as an iron source, over 80% of the world's ore production A coal-based melt reduction process for producing molten iron is known, so that it can directly use the iron ore that occupies.

On the other hand, molten iron manufacturing facilities using a conventional coal and iron ore directly according to the melt reduction process is known from US Patent No. 5,785,733 (July 28, 1998), which is schematically shown in FIG.

That is, as shown in Figure 1, the entire process is the preheating furnace 10, preliminary reduction path 20 and the final reduction path of the three stages of the flow reduction path (10, 20, 30) It is provided, and is connected to the final reduction path 30 is composed of a melt gasifier 40 is formed a coal filling layer.

On the other hand, in such a flow reduction process, the iron ore is continuously charged into the preheating furnace 10 via the first ore conduit 12, and at this time, the preliminary reduction furnace by the reducing gas supplied to the third gas conduit 21. The second gas is preheated while forming a bubble flow or turbulent flow layer on the first gas distribution plate 14 in (10), and then discharged through the second ore conduit 22 and charged into the preliminary reduction furnace 20. The reduction gas supplied to the conduit 31 is pre-reduced while forming a bubble flow or a turbulent flow layer on the second gas distribution plate 24 in the preliminary reduction path 20.

Next, discharged through the third ore conduit 32 installed between the preliminary reduction path 20 and the final reduction path 30 is charged into the final reduction path 30 and supplied to the first gas conduit 41. The gas is finally reduced while forming a bubble flow or turbulent flow layer on the third gas distribution plate 34 in the final reduction path 30 by the gas, and is discharged through the fourth ore conduit 42 again, and then again the coal filling layer. The molten gasifier 40 is charged into the molten gasifier 40 and is melted in the coal packed bed in the gasifier 40 so that the molten gas is converted into molten iron and discharged from the molten gasifier 40 to the outside.

However, the first to fourth ore conduits 12, 22, 32, and 42 are each provided with a closed valve 13, 23, 33, 43, so that the ore flow can be blocked if necessary. In addition, in the reducing gas, the bulky coal is continuously supplied from the furnace upper portion of the melt gasifier 40 to form a coal packed layer having a constant height in the furnace. Oxygen is blown through a plurality of air vents formed at the bottom of the packed bed outer wall to burn coal in the packed bed. At this time, the burned gas rises through the packed bed and is converted into high-temperature reducing gas so as to When discharged to the outside through the first to the third gas conduit 41, 31, 21 are sequentially supplied to each of the three stages of the flow reduction path (10), 20, 30, and finally the fourth It is discharged out of the process through the gas conduit 11 and is treated with water.                         

In addition, in FIG. 2, the gas distribution plates 14, 24, 34 installed inside the fluidized-bed reduction paths 10, 20, 30 to form a bubble flow or a turbulent flow layer to reduce the iron ore are shown. In each of these fluidized-bed reduction reactors, the ore conduits (12), 22, and 32 described above are connected to each other at a height of about 70 cm so as to be inserted into a certain height in each dispersion plate, that is, into the fluidized bed formed at the top of the dispersion plate. In this case, the first to third gas conduits 41, 31, 21 are not shown in FIG. 2.

By the way, the fluidized-bed reduction paths 10, 20 and 30 equipped with such conventional gas distribution plates 14, 24 and 34 are foreign matters such as dust generated during the flow reduction process on the upper part of the dispersion plate. Is accumulated and the nozzles 14a, 24a, 34a of each of the dispersion plates are clogged, and the dispersion plates 14, 24, 34 are periodically cleaned to prevent the movable itself of the flow reduction process from being interrupted. There is a need.

However, in the conventional case, after stopping the operation, it takes a long time for the worker to cool the reduction furnace to enter the fluidized-bed reduction reactor, and if the worker actually enters the interior of the reduction furnace and works after the temperature is cooled. Edo is not only difficult to work due to gas, dust, high heat, and narrow place, but also causes serious casualties such as gas poisoning due to the carelessness of workers. Especially, it takes considerable time for cooling and restarting. There was a problem of lowering the operation rate.

Accordingly, the present invention has been made to solve the above problems, and its object is to facilitate the cleaning of the dispersion plate even in a poor working environment such as high temperature, thereby reducing the operation rate of the flow reduction process and It is to provide a fluidized-bed reduction reactor to prevent the same safety accident in advance.

In order to achieve the object as described above, the present invention is to clean the nozzle of the distribution plate while rotating by inserting the pipe connected by the joint to the distribution plate through the manhole formed on the side of the flow reduction path.

To this end, the present invention is provided between the suction header and suction tube connected to the suction header and suction tube for suction and removal of spectroscopic and foreign matter accumulated in the dispersion plate nozzle, and the suction tube and the suction tube along a predetermined interval so as to rotate the suction tube and the suction tube. Swivel joint (Swivel joint), and the drive unit for moving the suction header by rotating the respective suction pipe with respect to the swivel joint.

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

Figure 3 is a schematic configuration diagram showing an apparatus for cleaning a dispersion plate of a fluidized bed reduction furnace according to an embodiment of the present invention, Figure 4 is a partial plan cross-sectional view of Figure 3 according to an embodiment of the present invention, Figure 5 is the present invention Some side cross-sectional view of FIG. 3 in accordance with an embodiment of FIG.

According to the above drawings, the apparatus is inserted into the upper part of the distribution plate (14, 24, 34) through the manhole (15, 25, 35) formed on the side of the flow reduction path (10, 20, 30) A suction header 51 is formed at a lower portion thereof, and a suction header 50 for suctioning foreign matter on the dispersion plate and the suction header 50 are continuously connected to each other via the swivel joint 60. And a plurality of suction pipes 70 through which foreign substances sucked into and communicated with each other are discharged, and a driving unit for changing the angle of each suction pipe 70 to move the position of the buffer header 50 on the distribution plate.

Here, the swivel joint 60 is a structure for rotatably connecting the one suction pipe 70 and the next suction pipe 70, as shown in Figs. And the inner slider 62 sliding in contact with the inner circumferential surface of the outer slider 61, and one suction pipe 70 is installed on one side of the inner slider 62 so as to be communicable, and the other side of the outer slider 61 is fixed to one side of the outer slider 61. The suction pipe 70 is installed to communicate with each other, and the two suction pipes 70 communicate with each other through the inner slider 62.

A communication hole 63 is formed on the opposite side to the suction pipe 70 of the inner slider 62 so as to communicate with the suction pipe 70 installed in the outslider 61, and also the suction pipe 70 of the out slider 61 is installed. Flow holes 64 are formed on the opposite side to allow the suction pipe 70 installed in the inner slider 62 to flow from side to side.

Therefore, the two suction pipes 70 installed on the inner slider 62 and the out slider 61 may be rotated through the swivel joint 60 to be bent at mutually necessary angles.

Unexplained reference numeral 65 is a felt packing installed on the contact surface of the inner slider 62 and the out slider 61 to maintain internal airtightness.

Here, the rotation shaft 66 installed at the upper and lower ends in the center of the inner slider 62 protrudes outward through the center of the out slider 61, and the rotation shaft 66 is connected to the driving unit. This will be described later.

And the suction tube 70 of the far end connected to the swivel joint 60 is equipped with a sturdy header 50 at its end.

Therefore, each suction pipe 70 and the suction pipe 70 is rotated at a predetermined angle between the suction pipes 70 through the swivel joint 60 installed at each connection portion, and finally, the position of the heading header 50 located at the end is dispersed. It can be moved anywhere on the plate (14, 24, 34).

On the other hand, the driving unit is fixed to the pivot shaft 66 of the inner slider 62 protruding out of the upper slider 61 of the swivel joint 60 and the operation bar 80 extending outwardly, and each It is connected to the operation bar 80 closest to the header header 50 through the end of the operation bar 80, the elastic wire 81, which can push or pull the operation bar 80, the wire 81 It is connected to include a drive cylinder 82 for pulling or pushing the wire (81).

Accordingly, when the wire 81 is pulled or pushed out by the stretching operation of the driving cylinder 82, the operation bar 80 to which the tip of the wire 81 is connected is pulled or pushed and finally the inner slider (outside the slider 61) 62) is rotated and the other inner slider 62 is also rotated with respect to the outslider 61 at the swivel joint 60 so that each suction pipe 70 is bent in one direction and the burr header 50 positioned at the end thereof is rotated. Will be sent to the desired location.                     

Here, the suction pipe 70 enters the center of the distribution plate through the manholes 15, 25, and 35, and thus, as shown in FIG. 7, the suction cylinder 82 pulls or pushes the wire 81 as the suction pipe ( 70) The header header 50 connected to the distal end may move the right or left axis with respect to the center of the distribution plate to reach the entire distribution plate area.

In addition, the drive unit is provided with a link member 83 to the operating bar 80 so that the rotation of the suction pipe 70 more smoothly, and each of the link members 83 between the swivel joint 60 The tip is rotatably coupled via the hinge shaft, and the auxiliary shaft 84 is rotatably installed on the hinge shaft, and the auxiliary shaft 84 is located at the center of the suction pipe 70 through the long hole 86 formed at the tip. It is structured to be linearly coupled to the guide protrusion 85 provided.

Accordingly, when the suction pipe 70 is bent through the swivel joint 60, the two operation bars 80 are opened or narrowed, and the link member 83 linked to the operation bar 80 is rotated as a whole and the auxiliary shaft ( 84) pull or push.

Of course, a suction pump (not shown) is connected to the outer end of the suction pipe 70 to provide suction power.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 6 and 7.

In order to clean the nozzles of the distribution plates 14, 24 and 34, first, the apparatus must be entered into the flow reduction paths 10, 20, and 30, and the manholes 15, A plurality of suction pipes 70 connected to the header header 50 and the swivel joint 60 through 25 and 35 are continuously entered.                     

In this state, when the driving cylinder 82 is stretched and operated, the elastic wire 81 connected to the piston rod of the driving cylinder 82 is pushed or pulled, and each suction pipe 70 is moved through the swivel joint 60. It is rotated and the head header 50 installed in the suction pipe 70 at the end is moved to the desired position of the dispersion plate.

For example, when the driving cylinder 82 is extended, the wire 81 connected to the driving cylinder 82 is pushed out. As a result, the operation bar 80 connected to the end of the wire 81 is pushed and the last swivel joint 60 is rotated, so that the suction pipe 70 and the suction pipe 70 installed in the outslider 61 of the last swivel joint 60. 70 is rotated by the header header 50 connected to.

As the header header 50 moves, the plurality of suction pipes 70 connected to the swivel joint 60 are also rotated through the swivel joint 60 in the direction in which the header header 50 moves. As shown, each suction pipe (70) is to follow the arc shape to send the end of the heading header 50 to the desired place.

On the other hand, a suction pump is connected to the outer end of the suction pipe 70 to suck air through the suction pipe 70 according to the operation of the suction pump.

Accordingly, as the suction header is applied through the suction pipe 70 in the state in which the header header 50 is placed at a desired position, foreign matter is sucked through the suction port 51 of the suction header 50 on the distribution plate and the suction pipe 70 is provided. It is discharged to the outside through.

According to the dispersion plate cleaning apparatus of the fluidized bed reduction furnace according to the present invention as described above, it is possible to perform the cleaning operation of the internal dispersion plate very easily, thereby preventing safety accidents such as deterioration of operation rate and gas poisoning of the operator. To prevent it.

In addition, the plurality of nozzles can be cleaned at a time, thereby reducing the time required for cleaning the nozzles, thereby increasing work productivity.

Claims (5)

A versatile header to suction and remove spectroscopy and foreign matter accumulated in the dispersion plate nozzle, A suction pipe connected to the vacuum header, A swivel joint installed between the suction pipe and the suction pipe at a predetermined interval to rotate the suction pipe and the suction pipe, A driving unit for moving the suction header by bending each suction pipe with respect to the swivel joint Dispersion plate cleaning device of a fluidized bed reduction furnace comprising a. The swivel joint of claim 1, wherein the swivel joint is cylindrical and includes an outer slider positioned outside and an inner slider sliding in contact with the outer slider inner circumferential surface, and one suction pipe is installed in one side of the inner slider so as to communicate with the outer slider. Dispersion plate cleaning apparatus for a fluidized bed reduction furnace, characterized in that the other suction pipe is installed in one side of the communication so that the two suction pipes communicate through the inner slider. The apparatus of claim 2, wherein a pallet packing for maintaining an inner airtightness is further provided at a contact surface of the inner slider and the out slider. According to any one of claims 1 to 3, wherein the drive unit is fixed to the rotation axis of the inner slider protruding to the upper side of the outslider of the swivel joint and extending horizontally outward, the end of each operation bar Dispersion plate cleaning of a fluidized bed reduction furnace characterized in that it comprises a wire of elastic material connected to the operating bar closest to the header header to push or pull the operating bar, and a driving cylinder connected to the wire to pull or push the wire. Device. According to claim 4, wherein the drive unit is provided with a link member on the operation bar, each of the link members between the swivel joints is rotatably coupled via a hinge axis, the auxiliary shaft is installed rotatably on the hinge axis And the auxiliary shaft is coupled to the guide protrusion installed at the center of the suction pipe through the long hole formed at the front end of the auxiliary shaft so as to be movable in a straight line.

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