KR200180925Y1 - Up and down skirt sealing apparatus - Google Patents

Abstract

The present invention relates to a lifting and lowering skirt sealing device that prevents dust accumulation, the hood is installed on the upper portion of the converter for cooling action, the skirt cooling device is installed to enable the lowering, lowering the outer peripheral surface of the hood, the hood and skirt A skirt up and down sealing device comprising a skirt sealing device that blocks air from entering and out of a cooling device, comprising: a main body having a space part enclosed between an inner wall and an outer wall, an air vent installed to pass through the space part, and an air vent connected to the air vent pipe A seal plate consisting of a supply pipe, a water supply pipe and a recovery pipe respectively installed on an upper portion of the main body, an electromagnetic valve and a bypass manual valve connected in parallel to the ventilation supply pipe, and a measuring plate configured to be inserted into the ventilation pipe and measure depth; The lower part is made of a double-cylindrical cylinder The seal plate is configured to be movable up and down in a state where the seal plate is inserted therein, and a seal jacket provided with a plurality of water supply nozzles connected from a water supply pipe therein is installed outside the seal jacket, and the bottom portion is inclined toward one side. It is formed so that the end of the inclined surface comprises an overflow jacket connected to the upper drain pipe.

Description

Up and Down Skirt Sealing Apparatus}

The present invention relates to a lifting and lowering skirt sealing device installed above the inlet of the converter in order to prevent secondary combustion of the exhaust gas and external leakage of dust, and in particular, to close the inlet of the converter for refining molten steel to exhaust The present invention relates to a raising and lowering skirt sealing device in which dust introduced into the skirt sealing device is easily discharged to the outside by blocking the outflow of gas and the inflow of outside air.

In general, the exhaust gas generated during the refining of molten steel in the converter contains a large amount of dust and a high concentration of carbon monoxide. Therefore, the exhaust gas is collected by a suction duct through a sealed duct, and the water is collected from the dust collector to remove dust from the cooled exhaust gas, and then discharged into the atmosphere through a chimney or sent to a storage tank for energy. Will be recycled.

In this series of exhaust gas treatment facilities, the up and down skirt sealing device that can move up and down at the top of the converter inlet is provided to block the inlet of the converter from the outside as necessary, thereby containing a large amount of dust. The exhaust gas is prevented from leaking to the outside, and the outside air is prevented from entering the converter unnecessarily. Therefore, secondary combustion and explosion caused by environmental pollution and air in the atmosphere are prevented from being introduced into the exhaust gas, thereby increasing the purity of carbon monoxide and preventing excessive generation of the exhaust gas.

This rising and falling skirt sealing device will be described with reference to FIG. 7 as follows.

In the state where the seal plate 105 fixed to the hood 101 is inserted into the inside of the seal jacket 110 filled with water, the seal jacket 110 is moved up and down by the hydraulic cylinder 115, thereby converting the converter 100. Inlet and the gap of the) is adjusted, the seal plate 105 is configured to be always inserted into the water in the seal jacket 110 by a predetermined depth to block the access of the outside air and exhaust gas.

However, a large amount of dust (19) generated during the operation in the converter 100 is introduced into the gap between the seal jacket 110 and the seal plate 105 is mixed in the water filled in the seal jacket 110 in a state that is not discharged Accumulation results in the suspension of operation or breakdown of equipment due to the accumulation of dust 19.

5A shows a skirt sealing apparatus currently used in a second steelmaking plant in Gwangyang Works.

Cooling water supplied from the upper portion to the lower portion of the seal plate 105 through the water supply pipe 106 is discharged to the seal jacket 110 through the overflow hole 107 formed at the upper outer side of the seal plate 105. At this time, a separate water supply nozzle 111 is installed at the lower portion of the seal jacket 110 to supply water into the seal jacket 110. The dust 19 introduced in such a state is discharged together with the water through the lower drain pipe 112 and the overflow jacket 113 to the upper drain pipe 114, and this structure has an overflow hole (the upper portion of the seal plate 105). Since water is discharged to 107, dust is attached to the wall surface of the seal plate 105, and the attached dust is dropped into the seal jacket 110 and accumulated. In addition, when the supply amount of the cooling water supplied to the seal plate is insufficient, the equipment accident that the seal plate 105 is melted due to high temperature occurs, and when the supply amount of the cooling water is excessive, the water discharged to the overflow hole 107 The seal jacket 110 is scattered to the outside to cause an explosion in the lower portion of the converter. Therefore, a proper amount must be maintained at all times. Since the closed dog house 102 must be opened to check the overflow hole 107, a safety accident may be caused by high temperature flame, carbon monoxide and scattered dust. .

Meanwhile, dust 19 accumulated in the seal jacket 110 should be discharged to the upper drain pipe 115 and the lower drain pipe 112 by being floated by the water supplied through the water supply nozzle 111, but the heavy dust ( 19a) is not discharged, and as shown in FIG. 6a, is intensively deposited on the far side from the lower drain pipe 112 of the seal jacket 110. In this case, the seal plate 105 hits the accumulated dust 19. Deformation and breakage of equipment accident occurs.

Figure 5b shows a 'water sealing device of the converter cooling skirt' of the Republic of Korea Patent Application No. 1997-39364.

The cooling water is supplied to the seal plate 105 which is double-sealed through the water supply pipe 106 to fill the inside of the seal plate 105, and a tube stored inside the seal plate 105 is provided. The cooling water is injected into the lower nozzle 109 through 108 to fill the inside of the seal jacket 110. Therefore, after the water sealing action by the dust 19 is collected in the overflow jacket 113, which is again discharged through the upper drain pipe (114). However, in this process, the dust 19a introduced into the seal jacket 110 during operation and the dust 19b deposited on the bottom of the seal jacket 110 have a plurality of nozzles 109 located at the lower end of the seal plate 21. It floats by the vortex action of the cooling water sprayed through and exits to the overflow jacket 113 together with the water. However, as shown in FIG. 6B, the dust 19 introduced into the seal jacket 110 during the converter operation has a low specific gravity due to its variety depending on the type of secondary raw materials and ferroalloys used during the operation. In addition, a specific gravity of about 4 to 6 is heavy and contains a large amount of dust (bump) (19b) that is deposited at a high speed without being injured in the water of the water sprayed from the nozzle 109 of the seal plate 105 There is a limit to effectively discharge the dust (19a, 19b) only by the floating force by the simple vortex action. In addition, a large amount of non-injured dust (19b) is gradually accumulated in the overflow jacket 113 of the bottom and top in the seal jacket 110, wherein the accumulated state of the dust is in the skirt sealing device of FIG. Even more severely. As a result of the cumulative dusts 19a and 19b, the skirt cooling device 18 that is operated up and down is not able to rise normally, and thus, the tilting of the converter is impossible, and the seal inserted into the seal jacket 110 is prevented. Large equipment accidents occur in which the plate 105 hits the dust 19 and is deformed or broken. This results in long downtimes and waste of maintenance costs associated with repairing or replacing them. During operation, since the accumulation degree of dust 19 in the seal jacket 110 cannot be known, the dog house 102 in which the skirt cooling device 18 is installed after recognizing the equipment accident occurs or periodically stopping the equipment is installed. After moving to the repair position, the cumulative state of the dust 19 in the seal jacket 110 should be measured and if necessary, the inspection opening 110a should be opened and removed manually, thereby increasing the amount of work and the risk of safety accidents due to high heat and height work. This will follow.

Therefore, the present invention provides a rising and falling skirt sealing device which prevents dust accumulation by eliminating dust introduced into the seal jacket during operation, as well as effectively checking the cumulative state of dust at any time. Its purpose is to.

The present invention for achieving the above object is a hood installed in the upper portion of the converter to act as a cooling, the skirt cooling device installed so as to lift and lower the outer peripheral surface of the hood, the air in and out between the hood and the skirt cooling device In the skirt up and down sealing device consisting of a skirt sealing device for blocking a, a main body having a space portion sealed between the inner wall and the outer wall, a vent pipe installed to penetrate the space portion, a vent supply pipe connected to the vent pipe, respectively in the upper portion of the main body A seal plate composed of a water supply pipe and a recovery pipe installed, an electronic valve and a bypass manual valve connected in parallel to the ventilation supply pipe, a measuring plate configured to be inserted into the ventilation pipe to measure depth, and a lower part of which is sealed to fill water therein. It is made of a double cylindrical structure, the seal plate is inserted therein It is configured to be movable up and down in a state, and the inside of the seal jacket is provided with a plurality of water supply nozzles connected from the water supply pipe, the outer side of the seal jacket, the bottom portion is formed to be inclined to one side, the upper end of the inclined surface It characterized in that it comprises an overflow jacket is connected to the drain pipe.

Figure 1a is a perspective view for explaining the configuration of the seal plate according to the present invention.

Figure 1b is a cross-sectional view of the seal plate according to the present invention.

Figure 2a is a perspective view for explaining the configuration of the seal jacket according to the present invention.

Figure 2b is a cross-sectional view of the seal jacket according to the present invention.

Figure 3a is a cross-sectional view for explaining an embodiment to which the present invention is applied.

Figure 3b is a flow diagram of the operation of the vent supply pipe electronic valve in accordance with the operation of the converter.

Figure 4a is a structural diagram showing a state in which dust is discharged after the skirt is lowered during the converter operation in the embodiment to which the present invention is applied.

Figure 4b is a structural diagram showing a state in which dust is discharged in the state in which the skirt is raised after the end of the converter operation.

5A and 5B are partial perspective views of a conventional skirt sealing device.

6A and 6B are cross-sectional views for explaining FIGS. 5A and 5B.

7 is a structural diagram for explaining the operation of the conventional raising and lowering skirt device.

<Explanation of symbols for main parts of the drawings>

1: seal plate 2: water pipe

3: recovery pipe 4: vent pipe

4a: nozzle 4-1: cover

5: Measurer 6: Aeration Pipe

6a: electromagnetic side 6b: bypass passive side

10: seal jacket 11: water supply nozzle

12: water supply line 13: overflow jacket

14a and 14b: lower drain pipe

15: upper drain pipe 16: check hole

18: skirt cooling units 19, 19a and 19b: dust

20: control unit 100: converter

101: hood 102: dog house

105: hydraulic cylinder 106: water supply pipe

107: overflow hole 108: tube

110: seal jacket 111: water supply nozzle

112: lower drain pipe 113: overflow jacket

114: upper drain pipe 115: up and down cylinders

120: Lance

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

Figure 1a is a perspective view for explaining the configuration of the seal plate according to the present invention,

The seal plate 1 includes a main body having a double-cylindrical shape having a space portion between the inner wall and the outer wall, and the plurality of holes are formed along the circumferential surface of the body so as to penetrate the space portion, The vent pipe 4 is coupled. A nozzle 4a is installed at the lower end of the vent pipe 4, and the vent pipe 4 is formed so that the upper part is divided into two branches, and one end of the vent pipe is shown in Fig. 1B. -1) and the other end is coupled to the vent supply pipe (6). The vent supply pipe 6 is provided with an electronic valve 6a which can be electrically opened and closed, and a bypass passive valve 6b is provided in parallel with the vent valve. The water supply pipe 2 and the recovery pipe 3 are respectively connected to the upper side of the seal plate 1.

The measuring device 5 is formed in a long bar shape, the outside of which is marked with a ruler, and is inserted into the inside of the vent pipe 4 with the upper cover 4-1 of the vent pipe 4 open. .

Figure 2a is a perspective view for explaining the configuration of the seal jacket according to the present invention, Figure 2b is a cross-sectional view of the seal jacket.

Seal jacket 10 is made of a double structure, the bottom is made of a closed cylindrical is configured to be filled with water therein. The seal plate 1 is inserted into the seal jacket 10, and the seal plate 1 is configured to be moved up and down in the inserted state. In addition, an overflow jacket 13 is installed outside the seal jacket 10. The bottom portion of the overflow jacket 13 is formed to be inclined to one side, the upper drain pipe 15 is connected to the end of the inclined surface. And the bottom surface of the lower portion of the seal jacket 10 is formed to form an inclination angle of about 15 degrees outward from the center, the lower portion of the seal jacket 10 is formed with a check hole 16, a plurality of lower drain pipe (14a, 14b) are respectively connected. And the lower part of the seal jacket 10 is provided with a water supply pipe 12 which is controlled by the manual side (12a), the water supply pipe 12 a plurality of water supply nozzles (11a, 11b, 11c ..) at a predetermined interval. Is installed. At this time, the end portion of the water supply nozzle 11 is coincided with the center of the space portion inside the seal jacket 10, and the spraying direction of the water supply nozzle 11 faces the lower drain pipes 14a and 14b located at both sides. Is placed. The installation angles of the water supply nozzles 11 are attached to each other at an outer circumferential surface of the seal jacket 10 in a non-horizontal structure, that is, inclined as shown in FIG. 2C. 19 is not caught by the water supply nozzle 11 when moving along the inclined bottom surface of the seal jacket 10.

The control unit 20 comprehensively controls the operation situation of the converter and controls the operation of the electronic valve 6a installed in the ventilation supply pipe 6.

Then, the operation of the present invention will be described.

3A and 3B are schematic diagrams illustrating an embodiment to which the present invention is applied, and a schematic diagram for explaining the operation of the vent supply pipe 6 and the electromagnetic valve 6a, and FIGS. 4A and 4B are inside the seal jacket 10. It is a structural diagram showing the process of discharged dust.

The cooling water supplied through the water supply pipe 2 of the sealed seal plate 1 is cooled and discharged through the recovery pipe 3 to be collected into the port 3a. The supply state of such cooling water can be easily confirmed from the outside. When the number of seals supplied from the water supply nozzle 11 is filled in the seal jacket 10, a part overflows the overflow jacket 13 and is discharged to the upper drain pipe 15, and a part of the lower drain pipe located below the seal jacket 10. Through 14a, 14b. Through this continuous process, gas is prevented from entering and exiting through the space between the skirt 18 and the hood 101 which rise and fall while operating in the converter 100.

When the skirt 18 is lowered in the skirt sealing device, as shown in FIG. 4A, a predetermined distance between the bottom surface of the seal jacket 10 and the end of the seal plate 1 (the skirt is raised and lowered in stroke is about 800 mm). Is formed, and a part of the dust 19 contained in the exhaust gas is introduced into the seal jacket 10 and mixed in the seal water. When a small amount of compressed air introduced through the bypass passive side 6b installed in the vent supply pipe 6 is supplied to the nozzle 4a through each vent pipe 4 installed to penetrate the inside of the seal plate 1, It is combined with the number of seals in the seal jacket 10, wherein the light dust (19a) having a specific gravity rises to the upper side of the seal water by the floating force of compressed air and overflows with water through the overflow jacket (13). Seal water containing the dust (19a) introduced into the flow jacket 13 is moved to a lower place along the bottom surface inclined to one side and then discharged to the outside through the upper drain pipe (15). In addition, the heavy dust (19b) that is mixed with the number of seals in the seal jacket (10) that is not injured is deposited on the bottom bottom of the seal jacket 10, wherein the water supply nozzles (11a, 11b,) installed in the seal jacket (10) 11c ...) is partially discharged along the bottom surface of the inclined seal jacket 10 by the power output and the vortices of the water sprayed through the lower drain pipes 14a and 14b installed at the bottom end. To be discharged. On the other hand, a part of the dust deposited by the vortex action in the water supply nozzle 11 is re-emerged to move to the overflow jacket (13).

Some of the dust introduced into the seal jacket 10 is removed in the above-described process, and some remain in the state deposited on the bottom of the seal jacket 10. In this state, when the blow job in the converter 100 is finished, the molten steel in the converter is transferred to a ladle (not shown) (the various devices are automatically controlled by the operation of the control unit 20 by the signal at this time and the idle state In this case, the solenoid 6a of the vent supply pipe 6 is developed by the signal of the control unit 20, and the compressed air of about 4 to 6 kg / cm ² is maintained for a predetermined time. It is injected into the seal jacket 10 through the nozzle (4a). In this state, as shown in FIG. 4B, the skirt cooling device 18 is raised, that is, the nozzle 4a of the vent pipe 4 provided at the bottom of the seal jacket 10 and the lower end of the seal plate 1 is shortest. In the state close to the distance, the dust (19b) deposited on the bottom surface of the seal jacket 10 by the strong dust output of the compressed air easily rises, which is again from the water supply nozzle (11a, 11b, 11c ...) It is moved to the lowest end of both sides along the bottom surface of the inclined seal jacket 10 by the sprayed seal water is discharged to the outside through the lower drain pipe (14a, 14b). On the other hand, at this time, the light dust (19a) is re-emerged to the top to exit the overflow jacket (13).

As described above, the ventilation process of the compressed air is automatically performed every time the blow job in the converter 100 is completed, so that dust 19 does not accumulate inside the seal jacket 10 and is always kept clean. do.

In addition, in order to check whether the dust 19 accumulated in the seal jacket 10 during operation of the converter 100, first, the supply of compressed air from the aeration supply pipe 6 above the seal plate 1 is cut off, and second, the After removing the cover 4-1 mounted on the vent pipe 4, the measuring device 5 is inserted into each vent pipe 4 so that the distance from the upper end of the vent pipe 4 to the bottom surface of the seal jacket 10 is removed. Measure In this way, by checking the accumulation state of the dust 19 accumulated on the bottom surface of the seal jacket 10, it is possible to prevent equipment accidents and operation interruption in advance.

As described above, the present invention allows the dust flowing into the skirt seal jacket to be continuously removed from the facility operation state during the converter operation, thereby maintaining the cleanness of the seal jacket as well as measuring the accumulation degree of dust from time to time. Accumulation can be detected early and take precautions, which effectively prevents equipment accidents, shutdowns and safety accidents.

Claims (4)

Skirt win consisting of a hood installed in the upper part of the converter for cooling, a skirt cooling device installed in the lower part of the outer circumferential surface of the hood so as to be lifted and lowered, and a skirt sealing device that blocks the air from entering between the hood and the skirt cooling device. In the downward sealing device, A main body having a space part sealed between the inner wall and the outer wall, a vent pipe installed to penetrate the space part, a vent supply pipe connected to the vent pipe, a water supply pipe and a recovery pipe respectively installed on the upper part of the main body, and an electromagnetic valve and a bypass connected in parallel to the vent supply pipe Seal plate consisting of a manual side, a measurer configured to measure the depth by inserting into the vent pipe, The lower portion is made of a cylindrical structure of a closed double cylinder to be filled with water, and is configured to be moved up and down while the seal plate is inserted therein, a plurality of water supply nozzles connected from the water supply pipe is installed inside With seal jacket, Is installed on the outside of the seal jacket, the bottom portion is formed to be inclined to one side, skirt lift, sealing device, characterized in that it comprises an overflow jacket connected to the upper drain pipe at the end of the inclined surface. The method of claim 1, The lower end of the vent pipe is provided with a nozzle, the upper portion of the skirt up, down sealing device, characterized in that configured to be coupled to the vent supply pipe. The method of claim 1, The seal jacket is formed so that the bottom surface is inclined outward with respect to the center, the lower portion is formed with a check opening, the lower portion of the outer wall is a skirt lift, down sealing device, characterized in that a plurality of lower drain pipes are respectively connected. The method of claim 1, The feed water supply pipe is controlled by a manual side, the water supply nozzle is raised and lowered sealing device, characterized in that installed to be inclined with respect to the bottom surface.