KR100758411B1 - An apparatus for sealing preheating opening of vessel in vacuum degasser - Google Patents

Abstract

A device for sealing a preheating port of a vessel heating burner in a vacuum degasser is provided to effectively prevent a flame of the burner from flowing out to the outside by shutting off a gap generated between a flange face of the preheating port and a sealing unit during the operation of the burner. A device(1) for sealing a preheating port(14) of a vessel heating burner(10) in a vacuum degasser comprises: a casing member(30) mounted on a burner injected into a preheating port of a vacuum degassing vessel; elastic clamping means(50) linked with the casing member; and a sealing member(70) which is connected to lower parts of the elastic clamping means, through which the burner passes in a sealed state, and which is closely adhered to a flange portion(14a) of the preheating port in a self-aligned form when the burner is injected into the preheating port. The elastic clamping means include a plurality of upper blocks(52), a connecting rod(54), a lower block(56), and an elastic body(58).

Description

An Apparatus for Sealing Preheating Opening of Vessel in Vacuum Degasser}

1 is a block diagram showing a vacuum degassing plant

2 is a view illustrating an external flow of a flame according to a sealing failure when operating a burner for raising a temperature of a conventional vacuum degassing vessel,

(a) is a state diagram

(b) is a main diagram showing a sealing failure condition

Figure 3 is an overall configuration showing the installation state of the preheater sealing device of the vessel heating burner according to the present invention.

Figure 4 is a main view showing a preheating port sealing apparatus of the present invention vessel heating burner

5 is a perspective view of main parts of FIG. 3;

6 is an exploded perspective view of FIG.

Explanation of symbols on the main parts of the drawings

1 .... Preheating port sealing device of vessel heating burner

10 ... Burners 12 ... Vacuum degassing vessels

14 .... Preheater 14a .... Preheater Flange

30 .... Casing member 50 .... Elastic fastening means

52 .... Upper block 54 .... Connecting rod

56 .... lower block 58 .... elastic

70 .... Sealing member 72 ... Heat resistant cover

74 .... Ceiling Seal

The present invention relates to an apparatus for sealing a preheating port into which a burner is put in order to heat up a vessel of a vacuum degassing facility used during vacuum degassing, which is one of steel making processes, and more specifically, a ferrous alloy inlet of a vessel and Provides a sealing device that comes into close contact with the preheater flange face and self-aligning type when drying the inner edge of the vessel or inserting the vessel preheater of the burner to raise the temperature of the vessel. The present invention relates to a preheating sealing device for a vessel heating burner, in which generation thereof is blocked and thus effectively prevents the outflow of the burner flame.

One of the facilities for manufacturing high clean steel in steel mills is the vacuum degassing facility (Reinstahl Huten Werke Heraus, RH), which is used to raise molten steel into the vacuum chamber according to the degree of vacuum forcing down the chamber. And it is to be made of high clean steel while falling.

In order to secure the quality required by the demand of the vacuum degassing operation, it is necessary to manage the vacuum in the vacuum chamber to a degree close to absolute vacuum.

In other words, it is easy to remove the gas in the molten steel under high vacuum conditions, if the vacuum condition is poor during the degassing process, the quality of the product is deteriorated, and the molten steel under treatment must be filtered all the way, so that of course cost loss, Low productivity makes it difficult to meet product delivery deadlines.

1 shows such a conventional vacuum degassing facility.

That is, as shown in FIG. 1, when the vessel (vacuum bath) 110 is covered in a state in which a vacuum is formed closely to the upper portion of the ladle 100, the deposition tube 120, that is, the lower portion of the vessel 110, is raised. As the molten steel (m) is circulated through the pipe and the down pipe, it is degassed.

Meanwhile, as shown in FIG. 1, a method of forming a vacuum in the vacuum degassing facility includes a steam injection nozzle mounted inside the ejector 130 having a Venturi tube type during vacuum degassing. When steam is supplied and injected at a pressure of about 7 to 8 bar, the suction force is generated in a direction in which steam is injected, and the inside of the vessel 110 is exhausted to form a vacuum.

Then, the steam injected through the steam injection nozzle 140 reaches the condenser 150, and by spraying the cooling water in the condenser 150 to liquefy the steam forcibly, a vacuum is formed by the size of the volume is reduced and this series The vacuum is maintained as the steps of continue.

That is, in FIG. 1, since the high-pressure steam is continuously injected through the nozzle 140 from the line L connected to the vessel 110 through the nozzle 140, a high-accuracy vacuum is formed on the vessel 110.

Meanwhile, FIG. 2 illustrates a preheating port (or an inlet used as a vessel inlet of ferroalloy) 200 installed in the vessel 110 of a conventional vacuum degassing facility and a vessel heating burner 210 input thereto. Doing.

That is, as shown in FIG. 2, the burner 210 is input through the preheater 200, and coke oven gas (COG), which is a by-product gas, is mixed with air and pure oxygen as a main fuel, and has a high calorific value. The temperature increase operation of the vessel 110 is performed by burning at a temperature of 1200 ° C.

However, when only the burner 210 is input to the preheater 200 while the burner 210 is lifted and lowered by using the elevating device 240, since the burner flame flows out through the preheater inlet, as shown in FIG. 2. Likewise, a flange portion 220 and a sealing flange 230 are installed at the preheating port inlet and the burner to closely contact each other when the burner descends to block the outflow of the flame or the outflow of the flame generated when the burner is operated.

However, when the burner 210 is lowered through the elevating device 240 in the case where it is attached to the preheater passageway or foreign matters are attached to the flange side of the preheater side, there is a gap between the sealing flange 230 and the flange portion 220. A gap is created and the sealing is not complete.

In particular, as shown in FIG. 2B, since the structures of the conventional preheater flange portion 220 and the burner sealing flange 230 are both fixedly provided to the preheater inlet side and the burner, the preheater internal edges are worn or If the burner is not inserted while maintaining the correct alignment through the preheating center, the sealing flange 230 attached to the burner is twisted while a gap is generated when the burner is in close contact with the preheating flange 220. It has occurred very frequently in the past.

That is, as shown in Figure 2a, there is a problem that the gap is easily generated because it is fixed while simply contacting the conventional preheater side flange portion and the burner side sealing flange, and the outflow of the flame (F) easily occurs when the burner is operated. .

As a result, the outflow of the burner flame decreases the efficiency of the temperature increase of the inside of the preheater, that is, the temperature of the vessel, and additionally causes various problems such as damage to the facilities due to extinguishing or extinguishing of the surrounding equipment due to the outflow of the flame. Will be.

Meanwhile, in FIG. 2, the burner elevating device 240 is connected to a driving cylinder (not shown) on the base 248 disposed according to the preheating opening angle, and moves on the moving base 244 moving in a rail and driving wheel structure. The moving plate 242 is connected to the drive chain 246 orbitally moved as the sprocket 246a, and a burner is connected to and installed on the moving plate 242 so that the burner is moved up and down by the movement of the moving plate and the preheating port is inserted. And departures are made.

In the conventional case, the vessel is heated in a state in which a heat-resistant material such as cerak wool is prevented from leaking between the flanges by a forced method of blocking the outside of the flame. If not, it would cause problems in the degassing of high grade steel grades, making it difficult to ensure stable operation and quality.

Accordingly, when the preheater side flange portion is fixed, but the burner side sealing flange that is moved in and installed is installed in a self-aligning manner, the gap between the preheater flange portion and the sealing flange is prevented and the sealing is always maintained. It would be desirable because the outflow is effectively blocked, and such techniques have been required.

 The present invention has been made in order to solve the above-mentioned conventional problems, the purpose of which is a ferrous alloy inlet of the vessel, if necessary, drying the inner edge of the vessel or the preheater of the vessel when the vessel is added to the vessel preheater for heating the vessel By providing a sealing device that comes into close contact with the ground in a self-aligning form, the preheating port of the vessel heating burner which prevents the occurrence of a gap between the flange surface of the preheating port and the sealing device when the burner is operated and thus effectively prevents the outflow of the burner flame. It is to provide a sealing device.

As a technical aspect for achieving the object as described above, the present invention, a casing member mounted to the burner which is put into the preheating port of the vacuum degassing vessel;

Elastic fastening means connected to the casing member; And,

A sealing member material connected to the lower end of the elastic fastening means, the burner passes in a sealing state, and is configured to be in close contact with the preheater flange part in a self-aligning manner when the preheater is inserted into the burner;

Provides a preheating sphere sealing device of the vessel heating burner configured to include.

At this time, preferably, the casing member is composed of a cylindrical body fixed while passing through the burner in the center.

In addition, preferably, the elastic fastening member, the upper block fixed to the casing member, the connecting rod which can be vertically flowable to the upper block but is prevented from being separated, and the sealing member is fixed while being connected to the lower portion of the connecting rod The lower block is to be composed of an elastic body elastically fastened to the outer side of the connecting rod between the upper and lower blocks.

And, the sealing member is composed of a circular member integrally formed in the center of the heat-resistant cover to seal while passing through the burner in the center, it is preferable that an annular protrusion is provided on the bottom outer edge of the sealing member of the circular member to increase sealing property. Do.

In addition, it is preferable that the burner is provided to the burner in a position in close contact with the flange of the preheater when the preheater is inserted into the burner.

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

Figure 3 is an overall configuration showing the installation state of the preheating sphere sealing device of the vessel heating burner according to the present invention, Figure 4 is a main view showing a preheating sealing device of the vessel heating burner of the present invention, Figure 5 3 is a perspective view illustrating main parts of FIG. 3, and FIG. 6 is an exploded perspective view of FIG. 5.

First, FIG. 3 and FIG. 4 show the whole configuration of the preheating sealing device 1 of the vessel heating burner according to the present invention.

That is, as shown in Figs. 3 and 4, the preheating port sealing device 1 of the vessel heating burner of the present invention is largely injected into the preheating port 14 of the vacuum degassing vessel 12. A casing member 30 mounted on the casing member, an elastic fastening means 50 connected to the casing member 30, and a lower end of the elastic fastening means 50, and the burner passes in a sealing state and is preheated. It is characterized in that it comprises a sealing member 70 configured to be in close contact with the self-aligning form when the preheating opening of the burner into the sphere flange portion (14a).

Therefore, in the apparatus of the present invention, the casing member 30 fixed to the burner 10 inserted into the preheater 14 of the vessel 12 for raising the vessel temperature and the elastic fastening means 50 connected to the upper end thereof to prevent separation. Since the sealing member 70 is installed at the bottom of the), the sealing member 70 can be flowed as compared with the conventional fixed installation in the burner, and eventually the sealing member is self-aligning with the preheater flange portion 14a. The close state is maintained.

As a result, when the burner 10 is introduced into the internal passage 14b of the preheating furnace 14, the burner is not normally aligned or the edges of the internal passage of the preheating outlet are worn out, and thus the burner is introduced into the preheating chamber 14. The flowable sealing member 70 of the device of the present invention is always tightly adhered to the preheating spherical flange 14a even if it is thrown out of the input center line (alignment), thereby compensating for the gap, thereby effectively creating a gap. It is suppressed and the flame is prevented from flowing out when the burner is operated.

At this time, the burner elevating device of reference numeral 240 shown in FIG. 3 is replaced with that described in FIG.

On the other hand, as shown in Figs. 4 and 5, the casing member 30 is composed of a cylindrical body which is fixed while the burner passes through the center.

Next, the elastic fastening member 50 of the preheating sphere sealing device 1 of the vessel heating burner according to the present invention is shown in FIGS. 4 to 6.

That is, as shown in the elastic fastening member 50 of the present invention, the compensating flow of the sealing member 70 is substantially enabled, and as described above, the temperature increasing burner 10 is inserted into the preheater. Even though it provides an important function to maintain the adhesion between the flange portion (14a) of the preheating sphere 14 and the sealing member 70 through the compensation flow of the sealing member.

At this time, as shown in Figures 4 and 6, the elastic fastening member 50 of the present invention, a plurality of upper blocks 52 and the upper block 52 fixed to the casing member 30, and up and down And a connecting rod 54 which is movable to prevent separation, and a lower block 56 to which the sealing member 70 is fixed while being fixedly connected to the lower portion of the connecting rod 54. The upper and lower blocks are composed of an elastic body 58 which is elastically fastened to the outside of the connecting rod.

That is, the upper block 52 is fixed through the casing member 30, the lower block 56 is connected to the sealing member 70 in close contact with the preheater flange portion, between the connecting rod 54 Is connected, and the elastic body 58, that is, the spring is fastened between the upper block and the lower block to enable a compensating flow of the elastic force of the spring from the sealing member to the connecting rod.

In addition, the elastic force of the elastic body may apply a force to press the sealing member 70 to increase the adhesion when the sealing member is in close contact with the flange of the preheating sphere.

At this time, as shown in Figure 4 and 6, the upper end of the connecting rod 54 is passed through the center hole 52a of the upper block 52, but is fastened with a nut (n) and a washer (w) after assembly Moves up in the upper block but is prevented from falling down.

Next, the lower end of the connecting rod 54 and the upper end through the upper and lower nuts n and washers w through the central hole 56a of the lower block 56 fixed to the sealing member 70. Unlike the fastening structure of the upper block is fixedly connected so as not to flow down or up.

Therefore, as shown in FIGS. 5 and 6, when the sealing member 70 flows, the upper end of the connecting rod 54 compresses the spring which is an elastic body by the flow amount, and the upper end thereof moves over the upper block. It enables a compensating flow from the member to the connecting rod.

On the other hand, as shown in Figures 4 and 5, the center of the sealing member 70 is formed with a hole 72a is provided with a heat-resistant cover 72 for sealing while the burner 10 passes through.

In this case, the heat resistant cover 72 may be provided as a ceramic cover having excellent heat resistance.

On the other hand, as shown in Figure 5, on the outer edge of the sealing member 70 of the circular member it is preferable to further form an annular protrusion 74 to increase the sealing property.

By the way, as shown in Fig. 3, the position of the burner provided in the preheating port sealing device 1 of the vessel heating burner of the present invention is important, the apparatus 1 of the present invention, preheating at the time of the preheating opening of the burner It should be precisely disposed at the position closely in contact with the spherical flange, and is substantially formed in the center of the casing member 30 to fix the burner (welding fixing or separate bracket) of the passage hole 30a through which the burner 10 passes. Bolting structure used) is determined by the position.

If the burner fixing position of the device is not correct, the preheating flange of the sealing member 70 will not be in close contact.

As described above, according to the present invention, the preheating port sealing device of the vessel heating burner, which is a ferrous alloy inlet of the vessel and, if necessary, preheats the flange surface and the automatic preheating opening of the vessel when the inner edge of the vessel is dried or the vessel is heated in the vessel for heating the vessel. By providing a tight sealing device, the gap between the preheater flange face and the sealing device is prevented during burner operation, thereby providing an excellent effect to effectively prevent the outflow of burner flame.

In addition, when the burner is operated, it is possible to provide another excellent effect of preventing pollution or environmental pollution by turning off the surrounding equipment when the flame is leaked outside.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (5)

A casing member mounted to a burner input to a preheating port of the vacuum degassing vessel; Elastic fastening means connected to the casing member; And, A sealing member connected to the lower end of the elastic fastening means and having a burner passing in a sealing state and configured to be in close contact with the preheating flange in a self-aligning manner when the preheating opening of the burner is inserted; Preheater sealing device of the vessel heating burner configured to include a. 2. The preheating sealing device of the vessel heating burner of claim 1, wherein the casing member is formed of a cylindrical body fixed while passing through the burner at the center thereof. The method of claim 1, wherein the elastic fastening member, An upper block fixed to the casing member; A connecting rod mounted on the upper block to prevent flow from the upper block; A lower block to which the sealing member is fixed while being connected and fixed to the lower portion of the connecting rod; And, An elastic body elastically fastened to an outer portion of the connecting rod between the upper and lower blocks; Preheater sealing device of the vessel heating burner, characterized in that consisting of. According to claim 1 or 3, wherein the sealing member is composed of a circular member integrally in the center of the heat-resistant cover for sealing while passing the burner in the center, The bottom outer edge of the sealing member of the circular member is a preheating sealing device of the vessel heating burner, characterized in that the annular protrusion is provided to increase the sealing property.  The preheater sealing apparatus of claim 1, wherein the burner is provided to the burner in a position in which the burner is in close contact with the flange of the preheater when the preheater is inserted into the burner.

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