KR100840248B1 - Cover of ladle for collecting waste heat - Google Patents

Abstract

An object of the present invention is to recover and recycle the high-temperature exhaust gas discharged to the atmosphere through the thermal cover, to prevent wasted energy, and to prevent the clogging of the porous plaque using the waste heat discharged. The present invention provides a thermal cover for ladle for recovering waste heat.

Accordingly, the present invention is a cover for covering the upper portion of the ladle, the number of times to re-introduce the gas discharged connected to the inside of the ladle through the porous plaus between the gas outlet of the upper cover and the porous plaque of the lower ladle It provides a thermal insulation cover for the waste heat recovery ladle comprising a portion, and a removal unit for removing the fine foreign matter contained in the exhaust gas during recovery.

Discharge pipe, suction pump, distribution pipe, weight, filter

Description

Cover of ladle for collecting waste heat {Cover of ladle for collecting waste heat}

1 is a perspective view showing a state in which the thermal cover for waste heat recovery according to the present invention is open to the ladle,

2 is a partial detailed view of FIG. 1 in accordance with the present invention;

3 is a cross-sectional view of FIG. 2 according to the present invention;

Figure 4 is a perspective view showing a state in which the thermal cover for waste heat recovery according to the invention is closed on the ladle,

5 is a cross-sectional view of FIG. 4 according to the present invention;

6 is a partial detailed view of FIG. 4 in accordance with the present invention;

7 is a partial detailed view of the thermal cover according to the present invention.

Explanation of symbols on the main parts of the drawings

10: insulation cover 20: discharge pipe

21: discharge hose 22: suction pump

31: rotating shaft 32: blocking plate

33: filter 34: inner tube

35: appearance 36: distribution pipe                 

40: rotation bar 41: weight

50: air hole 51: air pipe

52: distribution pipe

The present invention relates to a ladle of the steelmaking process, and more particularly to a heat cover for the waste heat recovery ladle to recover and reuse the waste heat discarded at the time and temperature correction of the ladle.

Generally, ladles are used to inject molten steel that has been blown during the steelmaking process into a tundish, and molten steel melted in the steelmaking furnace is taken to the casting ladle, and the ladle containing the molten steel is transferred to the tundish, the next process, by the crane and tundished. Molten steel is injected into the

Since the ladle receives the molten steel of high temperature, a flame retardant is provided therein. In particular, the ladle for continuous casting blows the inert gas to improve the cleanliness of the molten steel, and for this purpose, an inert gas blowing pore floc is installed under the ladle.

In the state of the ladle, the molten steel is contained therein, and in the state of use, there is no shrinkage and expansion phenomenon of the edible due to the high temperature of the molten steel, but in the ladle that is not used, the spooling of the edible due to the thermal change occurs and the edible becomes early Wear and dropping occurs in the

Therefore, when not using the ladle to cover the insulation cover to keep the inside, for this purpose, the injection nozzle for spraying the flame is installed on the upper portion of the insulation cover is connected to the gas supply hose.

By keeping warm, the lead is always kept at a constant temperature to prevent thermal spalling and also to ensure the temperature during use to prevent temperature drop.

In addition, a gas discharge port is installed at an upper portion of the thermal cover to discharge the exhaust gas generated during the combustion of the gas during thermal insulation and heat retention. Therefore, when the combustion is prevented heat waves and exhaust of the combustion gas by the excessive gas supply.

However, the above-described conventional structure has a problem in that heat is unnecessarily discharged together with a high temperature through a gas outlet installed in the thermal cover, causing heat loss.

Therefore, as well as heat loss for the rise of the temperature of the smoke, there is a problem that causes energy pollution and harmful combustion gases are discharged into the atmosphere causing environmental pollution.

In addition, the slag remaining in the ladle and now the mass is dissolved and flows to the bottom of the ladle during ladle insulation work, there is a problem that the slag flowing down to block the pores of the porous flocks installed on the bottom of the ladle.

In this way, when the pores of the porous plaque are blocked, even if the inert gas is supplied through the gas line, the gas is not introduced into the molten steel through the porous plaque, so that the clean operation is not performed properly and the quality of the molten steel is degraded.

 Accordingly, the present invention has been made in order to solve the above problems, by recovering and recycling the high-temperature exhaust gas discharged to the atmosphere through the thermal cover, the thermal cover for the waste heat recovery ladle that can prevent wasted energy The purpose is to provide.

In addition, another object of the present invention is to provide an insulation cover for waste heat recovery ladle that is capable of preventing the blockage of the pores floc using the waste heat discharged.

In order to achieve the object as described above, the present invention, in the heat insulating cover which is covered on the upper portion of the ladle, the gas discharged is connected between the gas outlet of the upper end of the heat insulating cover and the bottom of the ladle through the porous plug A recovery unit for re-introducing into the ladle, and a removal unit for removing the fine foreign matter contained in the exhaust gas during recovery.

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

1 is a perspective view showing a state in which the heat cover for waste heat recovery according to the invention is open to the ladle, Figure 4 is a perspective view showing a state in which the heat cover for waste heat recovery according to the invention is closed on the ladle. 5 is a cross-sectional view of FIG. 4 in accordance with the present invention.

According to the above drawings, the ladle (100) seating table 110 is installed so that the ladle 100 is placed on the floor of the installation, the work table 120 located above the ladle (100) on the seating table (110) Thermal insulation cover 10 is rotated over the laid ladle 100 to cover the upper ladle 100 is installed via the link structure 130, the link structure 130 is a drive cylinder 140 installed on the worktable 120 )

In addition, a gas supply hose 150 for supplying a flame spraying gas into the ladle 100 is installed at an upper portion of the insulating cover 10, and a discharge pipe 20 for discharging exhaust gas in the ladle 100 is installed at one side thereof. This is installed.

Here, the recovery unit of the present invention in the ladle 100 of the heat insulating cover 10 of the above structure, is connected to the upper gas discharge pipe 20 of the heat insulating cover 10 and the end is ladle through the mounting table 110 ( The discharge hose 21 is connected to the porous floc 180 of the 100 and the suction pump 22 is installed on one side of the discharge hose (21).

In order to connect the discharge hose 21 and the porous plug 180, the ladle 100 is connected to the mounting bracket 160 formed with the inert gas inlet 161 installed at the side of the ladle 100. The connection bracket 170 is installed at the lower portion of the seating unit 110, and the gas pipe 171 is installed to communicate with the upper portion through the connection bracket 170 and communicate with the inert gas inlet when the connection bracket is inserted into the mounting bracket. The hose 21 is connected to the gas pipe through a connecting bracket.

Therefore, the hot gas discharged from the ladle 100 according to the operation of the suction pump 22 is re-introduced back into the ladle 100 through the pores of the porous plug 180 connected to the discharge hose 21. .                     

In addition, the discharge pipe 20 has a structure that is bent at a right angle after being vertically connected to the top of the heat insulating cover 10, when lifting the heat cover 10 from the ladle 100 to stand vertically and ladle 100 When it is overlaid, it is kept horizontal.

On the other hand, the exhaust gas discharged from the ladle 100 contains a lot of dust and foreign matter and should be appropriately removed to prevent pore clogging of the porous plug 180.

To this end, a removal unit is installed at one side of the discharge pipe 20 to remove foreign substances contained in the exhaust gas.

2, 3 and 6 and 7 is a view showing the removal portion, the removal portion is rotatably installed on the bracket 30 is installed in the width direction at the bottom of the discharge pipe 20 of the upper portion of the insulating cover 10 Being installed on the rotating shaft 31 and the rotating shaft 31 is fixed to the blocking plate 32, the blocking plate 32 to block the inside of the discharge pipe 20 in a right direction and the same size as the blocking plate 32 Filter for removing foreign matter having a 33, the installation is connected to the lower end of the discharge pipe 20 along the rotation radius of the filter 33, the semi-circular distribution pipe (36) in communication with the discharge pipe 20, the rotation of the thermal cover 10 Actuation means for selectively positioning the blocking plate 32 or filter 33 in the discharge pipe 20 according to the state.

The operating means is fixed to both ends of the rotation shaft 31, the rotation bar 40 is installed in the same direction as the plane formed by the blocking plate 32, the weight weight 41 is installed at the end of the rotation bar 40 It includes.

The weight 41 is cut inward to the contact surface with the discharge pipe 20 so that the pivoting bar 40 can be rotated sufficiently until it is parallel with the discharge pipe (20).                     

Therefore, depending on whether the discharge pipe 20 is vertical or horizontal, the rotation shaft 31 is rotated by the weight of the weight 41 so that the blocking plate 32 or the filter 33 is disposed radially in the discharge pipe 20. Done.

In addition, the removal unit for removing the foreign matter contained in the exhaust pipe 20 is installed on one side of the discharge pipe 20 further includes a cleaning means for removing the foreign matter caught on the filter 33 when the heat insulating cover 10 is not used.

The cleaning means is a distribution pipe (36) consisting of an inner pipe (34), which is connected to a rotating bar (40) and a rotating bar (40) fixed to the discharge pipe (20) and is inserted into the outer pipe (35) by cutting the middle portion. And, the inner tube 34 is formed in the exterior 35 to inject air into the filter 33 exposed to the outside when inserted into the exterior 35, the air hole 50 toward the filter 33, the exterior ( Air hole 50 formed in the inner tube 34 of the position corresponding to the 35, and the air pipe 51 for supplying air to the air hole 50 of the exterior (35).

The air hole 50 is formed at regular intervals along the outer circumferential surfaces of the exterior 35 and the inner tube 34, and in order to supply air to all such air holes 50, the exterior 35 has an air hole 50. A strip-shaped distribution pipe 52 is connected to the air pipe 51 and is connected to one side of the distribution pipe 52.

Therefore, as shown in FIG. 6, when the pivoting bar 40 is perpendicular to the discharge pipe 20, the inner pipe 34 is drawn out with respect to the exterior 35 to connect the discharge pipe 20 to one distribution pipe 36. When the rotation bar 40 is parallel with the discharge pipe 20, the inner pipe 34 is inserted into the exterior 35, and half of the distribution pipe 36 is opened and the filter 33 is opened. Will be put on the tip of the.

Hereinafter will be described the operation of the present invention.

When the ladle 100 is placed on the ladle 100, the inert gas inlet installed on the side of the ladle 100 is in close contact with the connection bracket installed on the seat 110, and inside the connection bracket. The gas pipe installed in this manner communicates with the inert gas inlet.

At this time, the heat insulating cover 10 installed on the worktable 120 is still before being rotated to the upper ladle 100, when the heat insulating cover 10 is upright, the discharge pipe 20 installed on the heat insulating cover 10 is also vertical The weight weight 41 installed in the discharge pipe 20 is thus rotated toward the discharge pipe 20 by its own weight, as shown in FIG. 2.

As the weight 41 is rotated, the rotation bar 40 installed on the weight 41 is erected in the same direction as the discharge pipe 20, and the rotation shaft 31 connected to the rotation bar 40 is half. It rotates in a clockwise direction to rotate the filter 33 and the blocking plate 32 and the inner tube 34 installed on the rotation bar 40.

Therefore, the inner tube 34 is completely inserted into the outer tube 35 to open between the discharge tube 20 and the outer tube 35, and the filter 33 positioned at the end of the inner tube 34 is positioned at the outermost side of the outer tube 35. And, the blocking plate 32 installed at right angles to the filter 33 is located in the distribution port connecting the discharge pipe 20 and the inner pipe 34 to block the discharge pipe 20 from the outside.

In this state, when the thermal cover 10 is covered with the upper ladle 100 placed on the seating unit 110, the apparatus is operated to recover waste heat and at the same time, continuously puncture the pores of the porous plug 180 to block pores. Will be prevented.                     

That is, when the driving cylinder 140 is extended and operated, the link structure 130 connected to the piston loader of the drive cylinder 140 is rotated, and the insulating cover 10 connected to the link structure 130 is placed on the upper ladle 100. Rotated to.

When the heat insulating cover 10 is completely rotated and placed on the ladle 100, the discharge pipe 20 installed on the heat cover 10 is maintained in a horizontal state, and thus the rotation bar installed in the discharge pipe 20 is provided. 40 is rotated for the weight of the weight 41 to form a vertical state as shown in FIG.

As the rotation bar 40 is rotated, the blocking plate 32 and the filter 33 and the inner tube 34 installed on the rotation shaft 31 are also rotated in the same direction as the rotation bar 40.

Therefore, the inner tube 34 is drawn out from the exterior 35 so that the tip is in close contact with the bottom of the discharge pipe 20, and the filter 33 installed at the tip of the inner pipe 34 is laid on the lower side of the discharge pipe 20 so that the discharge pipe 20 and the distribution pipe 36 Will be placed between them. And the blocking plate 32 is erected to block the inside of the discharge pipe (20).

Meanwhile, the suction pump 22 is operated at the same time as the thermal cover 10 is rotated to discharge the exhaust gas inside the ladle 100 through the discharge hose 21 connected to the discharging pipe 20.

Therefore, the exhaust gas generated inside the ladle 100 by the warming action is discharged through the discharge pipe 20 and is blocked by a blocking plate 32 blocking the discharge pipe 20 while passing through the discharge pipe 20. 36) change direction and exit.

At this time, since the exhaust gas passes through the filter 33 located between the discharge pipe 20 and the distribution pipe 36, foreign substances contained in the exhaust gas are caught by the filter 33.

Exhaust gas from which foreign substances have been removed is moved to the connection bracket through the discharge hose 21 connected to the discharge pipe 20 and supplied to the inert gas inlet through the gas pipe inside the connection bracket to be installed at the bottom of the ladle 100. Into the ladle 100 through the pore of the ladle 100 is recycled to the heat retaining work.

When the ladle work 100 is completed, and the heat cover 10 is raised, the discharge pipe 20 is erected vertically, and as described above, the rotation bar 40 is driven by the weight of the weight 41. It rotates to rotate the blocking plate 32, the filter 33 and the inner tube 34.

When the inner tube 34 is completely inserted into the outer tube 35, the air holes 50 formed in the outer tube 35 and the inner tube 34 coincide with each other, and the air supplied through the air tube 51 is distributed through the distribution tube ( It is supplied to each air hole 50 through 52 and injected into the filter 33 inside the inner tube 34 through the air hole 50.

The foreign matter caught by the filter 33 is blown out by the air injected in this way.

According to the thermal cover of the waste heat recovery ladle according to the present invention as described above, it is possible to prevent the waste of energy by re-recovering and reusing exhaust gas discarded into the atmosphere and to prevent the environmental pollution by preventing the discharge of pollutants contained in the exhaust gas You can do it.                     

In addition, it is possible to prevent clogging of the porous plaque by supplying the recovered flue gas back into the ladle through the porous plaque.

Claims (4)

Ladle seats are installed on the floor of the facility so that ladles are placed. On the workbench located above the ladle, a thermal cover that covers the upper part of the ladle by rotating over the ladles placed on the seat is installed through the link structure. It is connected to the driving cylinder installed in the upper part of the insulating cover, the gas supply hose for supplying the flame spraying gas into the ladle is installed, and one side to the ladle thermal cover of the structure installed a discharge pipe for discharging the exhaust gas in the ladle In The discharge cover is connected to the upper gas discharge pipe of the insulating cover and the end is connected to the porus floc of the ladle through a seating rod, and the suction pump is installed on one side of the discharge hose, and the gas discharged through the porus floc inside the ladle. Recovery unit for re-insertion into the furnace, Removal unit for removing fine foreign matter contained in the exhaust gas during exhaust gas recovery Thermal insulation cover for waste heat recovery ladle comprising a. According to claim 1, wherein the removal unit is installed in the upper portion of the insulating cover, the discharge pipe for maintaining the horizontal state when standing up vertically when the cover is lifted from the ladle and covered over the ladle, and installed in the width direction at the bottom of the discharge pipe A rotating shaft which is rotatably installed on the bracket, and fixed to the rotating shaft, a blocking plate for blocking the inside of the discharge pipe, a filter for removing foreign substances having the same size as that of the blocking plate, installed at right angles to the blocking plate, and below the discharge pipe. Ladle for waste heat recovery, characterized in that it comprises a semicircular distribution pipe connected to the discharge pipe and connected to the discharge radius of the filter, and an actuating means for selectively positioning the blocking plate or the filter in the discharge pipe according to the rotation state of the thermal cover. cozy. According to claim 1 or 2, wherein the operating means is fixed to both ends of the rotation shaft is a rotation bar extending in the same direction as the plane formed by the blocking plate, characterized in that it comprises a weight installed on the end of the rotation bar Thermal insulation cover of waste heat recovery ladle to do. The filter of claim 3, wherein the removing part comprises an outer tube which is cut in the middle portion and fixed to the discharge pipe and an inner tube connected to the pivoting bar and rotated into the outer tube and inserted into the outer tube, and the inner tube is exposed to the outside when the inner tube is inserted into the outer tube. The air hole is formed in the exterior to inject air into the filter, the air hole is formed in the inner tube of the position corresponding to the exterior, and the air tube for supplying air to the exterior air hole. Thermal insulation cover of the ladle for waste heat recovery, characterized in that it further comprises a cleaning means for removing foreign matter caught.

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