KR100817169B1 - A boring apparatus provided with multiple nozzles for boring a discharging pipe of a bischoff scrubber - Google Patents

Abstract

The present invention relates to a bishop drain pipe boring apparatus having a multi-nozzle that drills the blocked portion by using high pressure water sprayed from a nozzle when a drain pipe is clogged by a dust sludge in a bishop scrubber used to dust the blast furnace gas of the furnace.

Bishop drain pipe boring device having a multi-nozzle of the present invention is a current removing device of the steel strip strip purifying the blast furnace gas by the high pressure water injected from the nozzle (3), the waste water used for purification upper and lower tanks (7, 9) In the bishop scrubber (1) which is to be discharged to the outside through the, the upper and lower tanks (7, 9) are inclined downwardly in order to be connected to the drain pipe (17) on the outlet 11 side in a straight line, respectively Extends, and each of the outlet pipes 13 is detachably coupled to each other at a downstream end thereof, and a connecting holder 31 is detachably coupled to the outlet pipes 13 and the upper and lower tanks along the axis in the outlet pipe 13 and the connecting holder 31. The nozzle body 51 which extends to the outlet 11 of (7, 9) is inserted and mounted.

Therefore, according to the bishop drain pipe boring apparatus of the present invention, dust sludge clogged in the drain pipe of the bishop scrubber can be removed without interrupting the blast furnace operation, thereby preventing the blast furnace operation loss and the safety accident during manual operation.

Furnace, Blast Furnace, Bishop Scrubber, Wet Clean, Drain, Blockage, Boring, Sludge

Description

A boring apparatus provided with multiple nozzles for boring a discharging pipe of a bischoff scrubber}

1 is a longitudinal cross-sectional view of a conventional bishop scrubber schematically showing a state in which clogging occurs in the drain pipe.

Figure 2 is a longitudinal cross-sectional view of a bishop scrubber showing a working state of boring the drain pipe clogging site using the drain pipe boring apparatus according to the present invention.

3 is a longitudinal cross-sectional view of the connecting holder shown in FIG.

4 is an external view of the nozzle body illustrated in FIG. 2.

FIG. 5 is an end view of the jet nozzle side of the nozzle body shown in FIG. 4; FIG.

            * Explanation of Signs of Major Parts of Drawings *

1: Bishop Scrubber 3: Injection Nozzle

7,9: upper and lower tank 10: clogging area

11 exit 13 exit pipe

17: drainage pipe 20: sewage tank

31: connection holder 33: pipe body

35 ball valve 37 check valve

39: cotter pin 41: stop plate                 

51: nozzle body 53: nozzle pipe

55: water supply hose 57: injection nozzle

59: Elastic packing 63,75: Check valve

65 nozzle cover 67 nozzle tip

69: injection hole 71: purge pipe

The present invention relates to a bishop drain pipe boring device, and more particularly, a bischoff scrubber used to remove dust present in a gas by spraying water at a high speed on a blast furnace gas generated in a furnace operation. The present invention relates to a bishop drain pipe boring device having a multi-nozzle through which a sludge clog is crushed by high pressure water sprayed from multiple nozzles when the drain pipe is blocked with dust sludge.

In general, the furnace is charged with iron ore and coke into the furnace to blow hot air to produce molten iron by a reduction melting process. The hot air blown into the furnace is discharged to the outside after the reduction melting process. This discharged gas is called blast furnace gas.

However, since the blast furnace gas contains a large amount of dust and carbon monoxide has a high temperature of toxic gas of 21%, the blast furnace gas is cleaned through a wet cleaning device such as bishop scrubber shown at 101 in FIG. 1 for reuse as a heat source. According to the bishop scrubber 101, the high pressure water is sprayed to form the water film 105 through the nozzle 103 on the blast furnace gas flowing into the scrubber 101 as indicated by the arrow A. It is possible to purify the blast furnace gas by removing the dust contained in the gas with water.

The pressure water injected from the nozzle 103 is sprayed so as to form an injection range of 90 ° to remove dust in the blast furnace gas, and the pressure water used to purify the blast furnace gas is an upper tank installed on the inner wall of the scrubber 101. Collected in the 107 and the lower tank 109 is discharged to the outside of the scrubber 101 is reused through the purification process in the sewage tank 120 equipment.

However, the blast furnace gas cleaning process of purifying blast furnace gas through such a series of processes has the following problems.

That is, the upper and lower tanks 107 and 109 in which the pressure water mixed with dust are collected are directly connected to the direct pipe 111 directly coupled to the outlet side of the tank 107 and 109 and the curved pipe coupled to the opposite side of the direct pipe 111 as shown in FIG. Connected to the upper and lower drain pipes (115, 117) through the 113 to discharge the sewage used for dust removal to the sewage tank 120, at this time bent pipe 113 connected to the direct pipe 111 having a length of about 2m Since the sludge dropped from the scrubber is piled up at the bending point of the curved pipe 113 because of the bending at an angle of 90 °, there is a problem that the blockage of the drain pipes 115 and 117 is blocked. There was a problem that can not work.                         

In addition, if the blockage 110 occurs in the curved pipe 113 of the drain pipes 115 and 117, the overflow drain pipes 119 and 121 installed from the drain pipe to the upper and lower tanks 107 and 109, respectively, are also blocked to the inlet, so that the upper and lower tanks are eventually closed. (107,109) the entirety is piled up with sludge to block the drain pipes (115, 117), causing gas flow obstruction, and the sludge is introduced into the bishop cone control unit (123) for controlling the blast furnace pressure, thereby preventing wear of the cone pressure control cone (125). There was a problem in that it promotes the pressure control uncontrolled state.

In addition, when the overflow pipes 119 and 121 are also blocked, the operation is stopped and the boring operation penetrates the blocked portion 110 of the cone control unit 123 and the drain pipes 115 and 117 in the blast-furnace state, and the upper and lower tanks 107 and 109. It is necessary to remove the accumulated sludge in the air. This work takes 5 to 6 hours due to manual work, and a safety accident that causes gas poisoning may occur due to inflow of blast furnace gas. In the case of), not only the pipe needs to be cut to remove the blockage, but also the blast furnace operation has to be stopped and the blast furnace gas has to be purged and removed.

Accordingly, the present invention has been proposed to solve the problems of the conventional boring method of the bishop scrubber drain pipe, and even if the drain pipe connected to the upper and lower tanks of the bishop scrubber is blocked by sludge, the operation of the blast furnace is not stopped. Boring can be performed to prevent safety accidents such as operation loss due to blast furnace stop, and gas poisoning, fall, collision, etc. that can occur during manual operation. The purpose is to facilitate the discharge of wastewater.

The present invention, in order to achieve the above object, in the bishop scrubber is to purify the blast furnace gas flowing from the furnace by the high-pressure water injected from the nozzle, and to discharge the sewage used for purification to the outside through the upper and lower tanks, In the upper and lower tanks, outlet pipes inclined downward so as to be connected to the drain pipe are extended in a straight line, and each outlet pipe is detachably coupled to the downstream end, and an outlet line is connected to the outlet in the outlet pipe and the connection holder. Accordingly, the present invention provides a bishop drain pipe boring device having a multi-nozzle in which a nozzle body extending to the outlet of the upper and lower tanks is inserted.

Hereinafter, a bishop drain pipe boring apparatus having multiple nozzles according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the bishop drain pipe boring device according to the present invention, as shown in Fig. 2, the sludge clogging portion blocking the outlet 11 of the upper and lower tanks 7, 9 connected to the drain pipe 17 of the general bishop scrubber 1 employed in the furnace. A device for crushing the drain pipe 17 by crushing the 10, and the bishop scrubber 1 to which the boring device of the present invention is applied, as shown in FIG. (2), the plurality of injection nozzles 3 protruding toward the center line on the inner surface of the case 2, the sewage that is injected from the nozzle (3) and used for blast furnace gas cleaning are collected and the sewage tank ( 20 is provided with a basic configuration such as upper and lower tanks 7 and 9 to be discharged to the bar. In order to apply the boring device of the present invention, first, the sewage tank 20 is discharged from the outlet 11 of the upper and lower tanks 7 and 9. Drain pipe extending to The upstream structure of 7) should be changed as shown in FIG.

That is, the outlet pipe 13 connected to the drain pipe 17 on the outlet 11 side of the upper and lower tanks 7 and 9 extends downwardly, for example, at a 30 ° angle with respect to the horizontal plane, as shown in FIG. 2. As shown, the outlet pipe 13 extends straight in order to insert the rod-shaped nozzle body 51, and the drain pipe 17 is connected to a position adjacent to the outlet 11 of the tanks 7 and 9. In addition, the connection holder so that the nozzle body 51 can be inserted into the outlet pipe 13 while preventing the blast furnace gas from leaking inside the scrubber 1 at the opposite ends of the tanks 7 and 9 of the outlet pipe 13. (31) is coupled, for this purpose flanges 23, 32 which are detachably coupled by bolts 21 are protruded from the downstream end of the outlet pipe 13 and the connection holder 31 in contact.

In this way, the connection holder 31 installed at the downstream end of the outlet pipe 13 is a kind of connection pipe as shown in FIG. 3, in which the nozzle body 51 is fitted, and the nozzle body 51 is fitted. It also serves to prevent the blast furnace gas from leaking inside the scrubber 1 when inserted. To this end, the connection holder 31 is one or more blast furnace gas leakage preventing valves 35 and 37 installed at both ends of the pipe body 33 and the body 33 as shown in FIG. 3 and the nozzle body 51 inserted into the connection holder 31. ) Is fixed to the holder 31 in a sealed state.

Here, the plurality of leak-proof valves 35 and 37 which are installed coaxially on both side ends of the pipe body 33 are formed when the nozzle body 51 is inserted into the holder 31. As long as it allows passage, any opening and closing valve may be used. As shown in FIG. 3, a ball valve 35 may be provided upstream of the pipe body 33 and a check valve 37 may be provided downstream. At this time, the diameter of the outlet 44 opened and closed by the flap 43 which hinges move is larger than the outer diameter of the nozzle pipe 53 of the nozzle body 51, and is manually operated by the handle 45. As for the ball valve 35 to be operated, a distribution hole 47 larger than the outer diameter of the nozzle pipe 53 is opened in the valve 35 axis direction in the center of the spherical valve cock 46 which opens and closes the valve 35.

The connection holder 31 is also provided with means 39 and 41 for pressing and fixing the nozzle body 51 inserted into the holder 31, to fix the nozzle body 51 inside the holder 31. Various fastening means may be used, but in this embodiment a cotter joint as shown in FIG. 3 may be employed. The coater joints 39 and 41 are provided with a stop plate 41 extending in the axial direction from the flange 48 attached to the downstream end of the holder 31 and a hole penetrated through the stop plate 41 as shown. A wedge-shaped coater pin 39 is inserted into the coater hole (not shown) penetrated through the nozzle pipe 53.

As described above, the upper and lower tanks 7 and 9 are inserted into the outlet pipe 13 extending from the upper and lower tanks 7 and 9 of the scrubber 1 and the connection holder 31 detachably coupled to the outlet pipe 13. The nozzle body 51 which penetrates the blockage part 10 by the dust mass or the sludge which generate | occur | produces in the outlet 11 of the () is the nozzle pipe 53 which forms an outer cylinder as shown in FIG. 4, and this pipe 53 ) And an elastic packing 59 attached to the distal end of the outer circumferential surface of the nozzle pipe 53.

Here, the nozzle pipe 53 is a hollow cylindrical body as shown in Figs. 4 and 5, supplying a high pressure pressure water to break the sludge clogging 10 through the water supply hose 55 connected to the rear end. In order to control the supply of pressure water, an opening / closing valve 61 is mounted at the connection portion of the water supply hose 55. In addition, a check valve 63 is installed at an opening and closing valve 61 and an adjacent portion of the nozzle pipe 53 so that gas of the scrubber 1 such as blast furnace gas introduced into the nozzle pipe 53 through the injection nozzle 57 is provided. It is designed to prevent backflow anymore. In addition, a nitrogen gas purge pipe 71 is connected around the nozzle pipe 53 between the on-off valve 61 and the check valve 63 to selectively supply high pressure nitrogen gas to the nozzle pipe 53. The pressure drop of the pressure water supplied through the hose 55 is compensated for. The purge pipe 71 has an on-off valve 73 for controlling the inflow of nitrogen gas and nitrogen gas introduced through the valve 73. The check valve 75 is prevented to prevent the reverse flow.

The plurality of injection nozzles 57 provided at the tip of the nozzle pipe 53 are axially arranged at regular intervals in the nozzle cover 65 blocking the pipe 53 as shown in FIGS. 4 and 5. The length of the nozzle tip 67 is cut in one direction as shown in the drawing. In addition, a plurality of jetting water holes 69 arranged at regular intervals between the nozzles 57 of the nozzle cover 65 are directly formed therethrough.

In addition, the elastic packing 59 attached to the outer circumferential surface of the nozzle pipe 53 is formed in the pipe body 33 when the nozzle body 51 is inserted into the connection holder 31 as shown in FIGS. 4 and 2. A conical seal packing whose diameter is reduced toward the injection nozzle 57 so as to be pressed into the outlet hole formed on the flange 48 side, and having heat resistance so that it can be elastically compressed when pressed into the connection holder 31 inlet. It may be made of a high elastic Teflon (Teflon) material, a relatively large reinforcement plate 42 is attached to the large diameter surface of the packing 59 to reduce the damage caused by the cotter pin (39).

Referring to the operation of the bishop drain pipe boring device having a multi-nozzle according to the present invention configured as described above are as follows.

In the process of purifying the blast furnace gas generated in the blast furnace using the Bishop scrubber (1), it is connected to the outlet (11) of the upper and lower tanks (7, 9) due to the sewage that is used for gas purification to contain dust lumps or sludge. When the blockage portion 10 is generated upstream of the sewage drainage pipe 17, the blockage portion 10 is bored by the bishop drainage pipe boring device of the present invention even though the work of the blast furnace continues. .

To this end, as shown in FIG. 2, the flange 23 of the downstream end of the outlet pipe 13 extending from the upper and lower tanks 7 and 9 and the flange 32 of the connection holder 31 are closely attached to each other, and the bolt ( 21 is coupled to the outlet pipe 13 and the connecting holder 31 by fastening. Then, the cotter pin 39 is removed from the stop plate 41 of the connection holder 31 and the nozzle body 51 is inserted into the connection holder 31. Once the hole of the flange 48 of the connection holder 31 is removed, The nozzle body 51 is gradually pushed into the connection holder 31 through the above.

Accordingly, the nozzle body 51 passes through the check valve 37 and the ball valve 35, and the elastic packing 59 attached to the outer circumferential surface of the nozzle pipe 53 is part of the flange 48 of the connection holder 31. When it comes in contact with the force slowly the elastic packing 59 is pressed into the compression holder 31 while slowly pushing the nozzle body 51 into the connection holder (31). When the nozzle body 51 is pushed as far as possible into the connection holder 31, the nozzle body inserted into the connection holder 31 is inserted by inserting the coater pin 39 into the coater hole of the nozzle pipe 53 through the stop plate 41. 51) are securely fixed in a sealed state.

In this way, when the insertion of the nozzle body 51 is completed, the injection nozzle 57 is in contact with or adjacent to the blockage portion 10 due to the sludge, as shown in Figure 2, in this state gradually opening and closing the valve 61 The high pressure water is injected through the injection water hole 69 and the injection nozzle 57 to partially crush the blocked portion 10 so that the crushed sludge mass and the high pressure water are discharged together through the drain pipe 17. It is discharged to, and the discharged sewage is purified back to clean water in the sewage tank (20).

At this time, it is determined whether or not the penetration is completed according to the insertion distance by measuring the distance that the nozzle body 51 is inserted into the connection holder 31, it is generally considered that the penetration is completed if more than 4.5m. In addition, when the pressure of the pressure water supplied to the nozzle body 51 drops below 5 kg / cm 2, for example, the on / off valve 73 of the purge pipe 71 is opened to allow the high pressure gas such as nitrogen gas to flow into the nozzle pipe 53. To maintain the sludge crushing pressure.

When the crushing of the sludge block 10 is completed, the nozzle body 51 is removed from the connection holder 31 in the reverse order as described above. First, the opening / closing valve 61 is closed to discharge the pressure water from the nozzle 57. Stops, the cotter pin 39 is pulled out, the nozzle body 51 is removed from the holder 31, the ball valve 35 is closed while the nozzle body 51 is gradually pulled out, and the nozzle body 51 is connected to the holder 31. The complete separation of the pipe ends the series boring.

As described above, according to the bishop drain pipe boring device equipped with a multi-nozzle according to the present invention, clogging due to sludge or dust lumps in the wastewater used for purification at the inlet of the drain pipe connected to the upper and lower tanks of the bishop scrubber for purifying the blast furnace blast furnace gas. Even if this occurs, it is possible to perform boring work on the blocked portion without interrupting the operation of the blast furnace, so that stable operation is possible, thereby improving productivity. In addition, boring work is carried out outside the furnace, which can reduce the burden of work load and the occurrence of disasters, and enables efficient facility and personnel management.

Claims (4)

In the bishop scrubber (1) which purifies the blast furnace gas which flows in from a furnace with the high pressure water sprayed from the nozzle (3), and discharges the wastewater used for purification to the outside through the upper and lower tanks 7, and 9, The upper and lower tanks 7 and 9 extend downwardly inclined downwardly so that the outlet pipe 13 is connected to the drain pipe 17 on the outlet 11 side. The connecting holders 31 are detachably coupled to each other, and the nozzle body extending in the outlet pipe 13 and the connecting holder 31 to the outlet 11 of the upper and lower tanks 7 and 9 along the axis. Bishop drain pipe boring device having a multiple nozzle, characterized in that the 51 is inserted. According to claim 1, The connecting holder 31 is connected to one side of the pipe body 33 and the pipe body 33 attached to the downstream end of the outlet pipe 13 so that the nozzle body 51 is inserted into the nozzle body 51. The nozzle body 51 inserted into the leak-proof valves 35 and 37, the pipe body 33, and the leak-proof valves 35 and 37, which prevent blast furnace gas leakage from the bishop scrubber 1, even when inserted. Bishop drain pipe boring device having a multi-nozzle characterized in that it consists of a pressing fixing means (39,41) mounted on the downstream end to prevent the separation. According to claim 1, The nozzle body 51 includes a nozzle pipe 53 having a high pressure water supply hose 55 connected to one end, a plurality of injection nozzles 57 protruding in an axial direction from an opposite side of the water supply hose 55, and the nozzle pipe ( 53. A bishop drain pipe boring device with multiple nozzles, comprising an elastic packing 59 attached to an outer circumferential surface thereof inclined so as to be tilted toward the injection nozzle 57. The method of claim 3, wherein The nozzle body 51 is connected to the outer peripheral surface of the nozzle pipe 53, the gas purge pipe 71 for selectively supplying a high pressure gas to the nozzle pipe 53 is connected to the bishop having a multiple nozzle Drain pipe boring device.

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