KR20130118048A

KR20130118048A - Door of coke oven

Info

Publication number: KR20130118048A
Application number: KR1020120040930A
Authority: KR
Inventors: 백부순; 채규색; 정길태
Original assignee: 주식회사 포스코
Priority date: 2012-04-19
Filing date: 2012-04-19
Publication date: 2013-10-29

Abstract

PURPOSE: A door device of a coke oven is provided to minimize a gas leakage to the outside as the pressure of a gas way arranged between a carbonizing chamber and a door is maintained lower than atmospheric pressure. CONSTITUTION: A door device (210) of a coke oven includes a door frame (212), a door body (220), and a gas way. A sealing member is arranged on an open portion of a carbonizing chamber so that the door frame adheres to the carbonizing chamber. The door body is installed on the door frame and includes first, second, and third heat resistant blocks. The gas way is formed by denting one side of the door body and induces the discharge of gas generated in the carbonization of coke. The gas way is formed to be tapered to a body frame from one side of the first heat resistant block and includes an inclined surface expanding a space formed between inner walls of the carbonizing chamber.

Description

Door unit of coke oven {DOOR OF COKE OVEN}

The present invention relates to a door apparatus of a coke oven, and more particularly, to a door apparatus of a coke oven having an improved structure to prevent exposure of gas.

In general, a coke oven is a facility for producing coke by distilling blast furnace gas such as coal (coal, coal) as a main heat source, and the coke produced as such is used as a raw material or a reducing agent in a steel mill.

The coke oven is composed of a carbonization chamber and a combustion chamber formed on the top of the heat storage chamber.

To this end, a charging hole is provided in the upper portion of each carbonization chamber, and a charging vehicle moving along the upper portion of the carbonization chamber charges raw materials such as coal, and when it is dried at a high temperature, gas is generated and coked. In addition, the upper side of the carbonization chamber may be associated with a gas collection pipe for collecting the gas to recycle the gas generated during the coal distillation process as fuel or to process and discharge environmental pollutants.

1 is a cross-sectional view showing a door device of a carbonization chamber according to the prior art. Referring to Figure 1, both sides of the carbonization chamber (1) is provided with a door device 10 for discharging the coke is completed dry while sealing the interior space.

The door apparatus 10 includes a door frame 12 and a door body 20 provided in the frame. The door body 20 is provided with a refractory lead to prevent heat transfer in the carbonization chamber 1.

In addition, the peripheral portion of the door device 10 is provided with a sealing strip 14 that is in close contact with the frame 3 provided in the periphery of the inlet and outlet of the carbonization chamber 1 and seals the inside thereof.

However, in the coke oven, the pressure inside the carbonization chamber 1 increases as the volatiles contained in the coal are converted into gas and released during the manufacture of the coke, and thus, in some carbonization chambers 1, the frame ( Gas is leaking out from the gap between 3) and the door apparatus 10. This phenomenon is caused by damage to the sealing strip 14 or contaminants adhering to the frame 3, etc. as the operating life of the coke oven increases. It is becoming.

On the other hand, the gas generated from the coke oven contains a variety of environmentally harmful substances, such as tar, which is a situation that is not only a problem of air pollution when leaking to the outside, but also a serious risk factor for the safety of workers.

In addition, in the conventional coke oven, a predetermined space is formed between the frame 3 of the carbonization chamber 1 and the refractory smoke 20 of the door apparatus 10, and the space is discharged into the upper gas collection pipe. It is utilized as the gas way (Gas Way) 30.

However, in the related art, as tar, carbon, or dust is fixed between the frame 3 and the door body 20, the gasway 30 is blocked to prevent the smooth discharge of the gas, thus, inside the carbonization chamber 1. Increasing pressure further increases the likelihood of gas leakage.

Figure 2 is a graph showing the pressure distribution inside the carbonization chamber of the coke oven according to the prior art. Referring to FIG. 2, in the coke oven, when the coal stored in the carbonization chamber is dried, gas leaks from the frame 3 and the door apparatus 10 at about 1 to 2 hours have elapsed as the internal pressure increases. It can be seen that. In addition, it can be seen that the leakage of gas occurred according to the change in the internal pressure and the drying time even after about 6 to 7 hours and about 10 to 11 hours.

As described above, in order to prevent the gas from leaking out between the carbonization chamber 1 and the door apparatus 10 due to the increase in the internal pressure of the coke oven and the sealing failure, the worker uses a sealing agent or the like to prevent the gas from flowing out. Repairing by means of an adhesive means such as sealing or heat-resistant bond is mainly used.

However, the conventional repair method increases the worker's workload, and due to such repair work, the overall cost of the unit is increased, and due to risk factors such as high heat, height, rain, and the like, it is difficult for the worker to take proper measures in practice, thus making the environment and safe. Many problems have arisen in management, and accordingly, the provision of the countermeasure for structurally preventing the outflow of gas between the carbonization chamber 1 and the door apparatus 10 is calculated | required.

One embodiment of the present invention is to facilitate the gas discharge of the door to prevent the outflow of gas between the carbonization chamber and the door of the coke oven, and to improve the structure to prevent damage to the sealing agent by lowering the heat transfer rate of the door coke It is an object to provide a door device of an oven.

A door apparatus of a coke oven according to an aspect of the present invention is a door apparatus of a coke oven for opening and closing a carbonization chamber in which coke is dried in a coke oven, the door frame is in close contact with a sealing member through the opening of the carbonization chamber ; A door body provided to the door frame to block heat transfer in the carbonization chamber; And a gasway provided to induce one side of the door body to inwardly discharge the gas generated when the coke is dried.

Here, the door body is provided on one side of the door frame and the first heat-resistant block drawn to the opening of the carbonization chamber, and the second heat-resistant block provided apart from the support member in front of the first heat-resistant block And a third heat resistant block connected to the support member to block between the first heat resistant block and the second heat resistant block.

In addition, one end of the support member is installed on the first heat resistant block, and the other end extends to be in contact with a rear surface of the second heat resistant block at the other end of the main support part extending in the direction of the second heat resistant block and the main support part. The second heat resistant block may be extended through the first fastening means, and the extension part may be held. The side of the main support may be coupled to the third heat resistant block by the second fastening means.

In addition, the first fastening means includes a slit portion penetrating through one side of the extension portion, a hook portion provided on a rear surface of the second heat resistant block and inserted into the slit portion, and the hook portion inserted through the slit portion. It may be installed on one side and may include a third fastening means for fixing the second heat resistant block.

Here, the third fastening means may include a pin member having a shape in which the cross-sectional area increases from the front end to the rear end inserted into the slit part, and the hook part may be formed with a coupling hole into which the pin member is inserted.

On the other hand, the second fastening means may be coupled to the side of the main support portion via the fastening member on the outside of the third heat-resistant block may include a cover plate for holding and holding the third heat-resistant block.

The second fastening means may further include an auxiliary connection part provided between the main support part and the third heat resistant block and to which the fastening member is coupled.

In addition, the gasway may include an inclined surface tapered at one side of the first heat resistant block in the body frame direction to extend a space formed between inner wall surfaces of the carbonization chamber.

According to one embodiment of the invention, the gas can be quickly discharged through the gasway provided between the carbonization chamber and the door, thereby preventing the leakage of gas. In addition, the present embodiment may maintain the pressure of the gasway at a pressure lower than atmospheric pressure, thereby minimizing the leakage of gas to the outside even when the pressure inside the carbonization chamber is increased or when the carbonization chamber and the door are not sealed. can do.

In addition, since the hot gas is quickly exhausted through the gasway in the present embodiment, it is possible to prevent the sealing between the carbonization chamber and the door from being damaged by the high temperature, thereby preventing the leakage of the gas.

In addition, the present embodiment can minimize the transfer of the high temperature in the carbonization chamber to the door made of a double heat-resistant structure.

As such, the present embodiment can minimize the leakage of gas in the carbonization chamber to the outside, thereby minimizing air pollution, and thus can improve the environment in the steel mill. In addition, the present embodiment can prevent the outside air is sucked into the furnace by sealing between the carbonization chamber and the door, thereby improving the quality of the coke and improve the drying efficiency.

In addition, the present embodiment can increase the life of the furnace due to the prevention of thermal damage and leakage of gas, it is possible to reduce the frequency of repair due to the leakage of gas between the carbonization chamber and the door, thereby reducing the workload In addition, it is possible to prevent worker safety accidents due to work, and improve productivity by maintaining smooth operation.

1 is a cross-sectional view showing a door device of a carbonization chamber according to the prior art.
Figure 2 is a graph showing the pressure distribution inside the carbonization chamber of the coke oven according to the prior art.
Figure 3 is a block diagram showing a coke oven with a door device according to an embodiment of the present invention.
Figure 4 is a conceptual diagram illustrating to explain the coke distillation process according to an embodiment of the present invention.
5 is a perspective view showing a door apparatus of a coke oven according to an embodiment of the present invention.
Figure 6 is an exploded perspective view showing a door apparatus of the coke oven according to an embodiment of the present invention.
Figure 7 is a cross-sectional view showing a door apparatus of the coke oven according to an embodiment of the present invention.
8 is an enlarged view of a portion A of FIG. 7.
9 is an enlarged perspective view illustrating a coupling relationship of part A of FIG. 7;
10 is a conceptual view illustrating a state in which a gas in a carbonization chamber of a coke oven rises by a door device according to an embodiment of the present invention;

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

3 is a block diagram illustrating a coke oven equipped with a door apparatus according to an embodiment of the present invention, Figure 4 is a conceptual diagram showing to explain the coke distillation process according to an embodiment of the present invention.

3 and 4, the coke oven 100 includes a plurality of carbonization chambers 110, and after charging coal using the charging vehicle 120, about 1240 ° C. By blocking external air and drying for about 19 hours at the above temperature, it is possible to produce coke free of volatiles contained in coal.

When the coke oven 100 burns gas in a combustion chamber and heats it, coal charged in the carbonization chamber 110 is carbonized, and coke oven gas (COG) is generated by thermal decomposition in this process. . The generated COG may be sent to the Hwaseong factory through the riser 200 provided in the coke oven 100 and the gas collection pipe 202 connected thereto. Here, as the gas collection pipe 202 is maintained at a predetermined vacuum pressure (negative pressure), the COG may be easily introduced into the rising pipe 200.

In addition, after the gas collection pipe 202 is closed in the coke oven 100, the air in the carbonization chamber 110 is burned and discharged to the outside through the rising pipe 200.

On the other hand, the coke after dry distillation in the coke oven 100 may be discharged to the carbonization chamber 110 outside. To this end, the carbonization chamber 110 has openings formed at both sides thereof, the inside of which is closed by the door device 210 provided in the opening, and the door device 210 may be opened when the coke is discharged.

The coke oven 100 discharges the coke having been dried in the carbonization chamber 110 by the ram 132 of the extruder 130 in the state that the door device 210 is opened, the coke guide of the transfer car 140 After loading in the fire truck 150 through, and moved to the digestion tower to digest the dried coke to produce the coke of the final product.

Meanwhile, in the present embodiment, the COG generated when the coke is dried includes various environmentally harmful substances including volatile components and tars, and the carbonization chamber 110 and the gas so as not to leak to the outside during the coking process. A seal is made between the door devices 210.

5 is a perspective view showing a door apparatus of a coke oven according to an embodiment of the present invention, Figure 6 is an exploded perspective view showing a door apparatus of a coke oven according to an embodiment of the present invention.

7 is a cross-sectional view illustrating a door apparatus of a coke oven according to an embodiment of the present invention, FIG. 8 is an enlarged view of a portion A of FIG. 7, and FIG. 9 is an enlarged view of a coupling relationship of the portion A of FIG. 7. One perspective view.

5 to 9, the door apparatus 210 of the coke oven 100 of the present embodiment includes a door frame 212 in close contact with an opening of the carbonization chamber 110, and the door frame 212. The door body 220 may be provided to block heat transfer in the carbonization chamber 110.

In addition, a gasway 240 may be provided at one side of the door body 220 to induce the discharge of the gas so that the gas generated during the drying of the coke is not discharged between the carbonization chamber 110 and the door device 210. Therefore, the gas between the carbonization chamber 110 and the door device 210 among the gas generated in the coke oven 100 flows into the gasway 240 and then is provided with a rising pipe provided in the upper space of the carbonization chamber 110. 200).

That is, in the coke oven 100, the gas between the carbonization chamber 110 and the door device 210 is collected in the upper space of the carbonization chamber 110 through the gasway 240, and then discharged to the riser 200. Can be. At this time, the riser 200 is maintained at a vacuum pressure (negative pressure), and thus gas in the upper space of the carbonization chamber 110 may be sucked into the riser 200 due to the pressure difference and discharge may be performed. Therefore, even if a gap is formed between the carbonization chamber 110 and the door device 210, it is possible to prevent the leakage of gas to the outside in the atmospheric pressure state.

In this embodiment, the gasway 240 may be provided by recessing one side of the door body 220 inward. The gasway 240 extends the space between the inner surface of the carbonization chamber 110 and the door body 220, and may be formed as a space formed accordingly.

In addition, in the present embodiment, the gasway 240 may be formed with a space sufficient to discharge the gas between the inner surface of the carbonization chamber 110 and the door body 220, and thus, tar or dust included in the COG. It is possible to prevent clogging due to the like.

More specifically, in the present embodiment, the door frame 212 is provided with a sealing member 214, in close contact with the periphery of the carbonization chamber 110 in the state of interposing the sealing member 214 and the carbonization chamber 110 The interior can be sealed. To this end, an opening frame 112 may be provided at a periphery of the carbonization chamber 110, and the sealing member 214 may include an opening frame 112 of the carbonization chamber 110 and a door frame of the door device 210. A gap can be sealed between the 212s.

To this end, a plurality of actuators 216 may be provided at one side of the door frame 212 to press the sealing member 214 in close contact.

In addition, in the present embodiment, the door body 220 may include a first heat resistant block 222 provided on one side of the door frame 212 and drawn out to an opening of the carbonization chamber 110.

In this embodiment, the gasway 240 may be provided at one side of the first heat resistant block 222, and for example, an inclined surface inclined to taper toward the door frame 212 at one side of the first heat resistant block 222. 223). The inclined surface 223 may expand the space formed between the inner wall surface of the carbonization chamber 110 and the first heat resistant block 222 to provide a gas discharge passage.

In this embodiment, the gasway 240 has been described as including an inclined surface 223 provided on one side of the first heat resistant block 222, but the shape of the gasway 240 is not limited thereto and is modified in various shapes. Can be. For example, the gasway 240 may include a groove formed on one side of the first heat resistant block 222.

The first heat resistant block 222 may include a cold face block, and may be made of a fireproof material to prevent the temperature in the carbonization chamber from being transmitted to the door frame 212.

Preferably, a heat insulating material 224 may be further provided between the first heat resistant block 222 and the door frame 212. For example, the heat insulator 224 may include glass wool, and the heat insulator 224 may include a sudden temperature change or thermal change between the door frame 212 made of metal and the first heat resistant block 222 made of fireproof material. Shock can be prevented.

In addition, a second heat resistant block 226 may be provided in front of the first heat resistant block 222. The second heat resistant block 226 may be provided spaced apart from the first heat resistant block 222 by a predetermined distance through the support member 228.

The second heat resistant block 226 may include a hot face block, which is in contact with the coke coagulated in the carbonization chamber 110, and is provided as a fireproof material so that the high temperature in the carbonization chamber 110 is external. Can be suppressed.

On the other hand, the support member 228 may include a main support portion 228a, one end of which is installed in the first heat resistant block 222 and the other end thereof extends in the direction of the second heat resistant block 226.

Here, the main support 228a may be provided integrally with the first heat resistant block 222, and may be coupled by a separate fastening means.

In addition, the other end of the main support portion 228a may be provided with an extension portion 228b extending to contact the rear surface of the second heat resistant block 226.

The second heat resistant block 226 may be coupled to the extension part 228b. At this time, the second heat resistant block 226 may be coupled via the first fastening means.

Here, the first fastening means may include a slit portion 228c formed through one side of the extension portion 228b.

In addition, a hook portion 227 inserted into the slit portion 228c may be provided on the rear surface of the second heat resistant block 226. Then, the hook part 227 is inserted through the slit part 228c of the extension part 228b, and then the second fastening block 226 can be held in the extension part by the third fastening means.

For example, in the present embodiment, the third fastening means may be provided as a pin member 229 having a cross-sectional area that increases from the front end to the rear end inserted into the slit portion 228c. For example, the pin member 229 may have a wedge shape.

In addition, the engaging portion 227a through which the pin member 229 is inserted may be formed in the hook portion 227.

The coupler 227a may be formed to correspond to the fin member 229, and extends with the second heat resistant block 226 as the pin member 229 is inserted into the coupler 227a of the hook portion 227. The parts 228b may be held in close contact with each other. In the present embodiment, the pin member 229 is inserted in the downward direction from the upper side of the coupler 227a, and thus can be prevented from being separated by self weight and friction.

In this embodiment, the third fastening means has been described as including a pin member 229 inserted into the coupling hole 227a of the hook portion 227, but is not limited thereto. For example, the third fastening means may include a bolt or a nut.

In addition, a third heat resistant block 230 may be provided between the first heat resistant block 222 and the second heat resistant block 226, that is, on both sides and the top and bottom of the third heat resistant block 230.

The second fastening means may include a cover plate 232 provided on the outside of the third heat resistant block 230.

The cover plate 232 is inserted into the cover plate 232 and the third heat resistant block 230 in a state where the third heat resistant block 230 is interposed between the main support parts 228a and fastened to the main support part 228a. The third heat resistant block 230 may be held and coupled to the main support part 228a through the member.

For example, the fastening member may include a bolt member, and the main support part 228a may include a bolt hole to which the bolt member is coupled, or a nut member coupled to the bolt member.

In the present embodiment, the third heat resistant block 230 may be held in close contact with the main support part 228a, and may be held in various shapes in addition to the structure.

For example, the main support 228a and the third heat resistant block 230 may be spaced apart from each other by a predetermined distance, and preferably, the second fastening means may be provided in the space spaced apart from each other to provide the third heat resistant block 230. The support may further include an auxiliary connection 234 coupled to the main support 228b.

The auxiliary connection part 234 may be provided in the form of a rod, and a bolt member 232a for fastening to the side of the main support part 228a may be integrally provided at one end thereof. In addition, a bolt hole 232b may be formed at the other end of the auxiliary connection part 234 so that the fastening member inserted into the cover plate 232 and the third heat resistant block 230, that is, the bolt member B may be fastened.

Referring to the operation of the door apparatus of the coke oven configured as described above are as follows.

10 is a conceptual view illustrating a state in which a gas in a carbonization chamber of a coke oven rises by a door device according to an embodiment of the present invention.

Referring to FIG. 10, when dry water is made in a state where coal is charged in the carbonization chamber 110 of the coke oven 100, gas G may be generated in the process of producing coke. The gas may be collected into the upper space of the carbonization chamber 110, and then discharged to the gas collection line 202 through the upper riser 200.

On the other hand, as the pressure inside the carbonization chamber 110 increases, the gas G also flows to the door device 210 that blocks both sides of the carbonization chamber 110.

At this time, the gas (G) flowing toward the door device 210 rises through the gas way 240 provided in the first heat resistant block 222 of the door body 220 to rise in a vacuum (negative pressure) state ( It is sucked to 200).

As such, in the present embodiment, the gas G introduced into the adjacent portion of the door device 210 and the carbonization chamber 110 may be quickly exhausted through the riser 200, and the door device may be maintained at atmospheric pressure. Outflow into the gap between the 210 and the bullet chamber 110 can be prevented.

In addition, as the hot gas G is prevented from leaking into the gap between the door device 210 and the carbonization chamber 110 in the present embodiment, damage to the sealing member 214 may be prevented, thereby It is possible to improve the sealing performance and the durability of the device 210.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. It will be clear to those who have knowledge.

100: coke oven 110: carbonization chamber
120: charging car 130: extruder
132: ram 140: transfer car
150: fire truck 200: riser
202: gas collection pipe 210: door device
212: door frame 214: sealing member
216: actuator 220: door body
222: first heat resistant block 223: inclined surface
224: insulation 226: second heat resistant block
227: hook portion 227a: coupling sphere
228 support member 228a main support portion
228b: extension 228c: slit
229: fin member 230: third heat resistant block
232: plate 234: auxiliary connection
240: gasway

Claims

In the door apparatus of the coke oven for opening and closing the carbonization chamber where the coke is dried in the coke oven,
A door frame in close contact with an opening of the carbonization chamber through a sealing member;
A door body provided to the door frame to block heat transfer in the carbonization chamber; And
A gasway provided to induce one side of the door body to inwardly discharge gas generated when the coke is dried;
Door apparatus of the coke oven comprising a.

The method according to claim 1, wherein the door body
A first heat resistant block provided on one side of the door frame and drawn out to an opening of the carbonization chamber;
A second heat resistant block spaced apart from each other by a support member in front of the first heat resistant block;
A third heat resistant block connected to the support member to block between the first heat resistant block and the second heat resistant block;
Door apparatus of the coke oven, comprising a.

The method of claim 2, wherein the support member
One end is installed in the first heat resistant block, and the other end thereof includes a main support part extending in the second heat resistant block direction;
An extension part extending from the other end of the main support part to be in contact with a rear surface of the second heat resistant block, the second heat resistant block being coupled to and held by a first fastening means;
Door side of the coke oven, characterized in that the third heat-resistant block is coupled to the side of the main support via the second fastening means.

The method of claim 3, wherein the first fastening means
A slit portion formed through one side of the extension portion;
A hook part provided on a rear surface of the second heat resistant block and inserted into the slit part;
The door apparatus of the coke oven, characterized in that it is installed on one side of the hook portion inserted through the slit portion and comprises a third fastening means for fixing the second heat resistant block.

The method of claim 4,
The third fastening means includes a pin member having a shape in which the cross-sectional area increases from the front end to the rear end inserted into the slit part,
Door unit of the coke oven, characterized in that the hook portion is formed through the coupling hole is inserted into the pin member.

The method of claim 3, wherein the second fastening means
A door apparatus of the coke oven, characterized in that the outer plate is coupled to the side of the main support via a fastening member on the outside of the third heat resistant block and holding the coupling of the third heat resistant block.

The method of claim 6, wherein the second fastening means
The door apparatus of the coke oven, characterized in that it further comprises an auxiliary connecting portion provided between the main support and the third heat-resistant block and the fastening member is coupled.

8. The gasway of claim 2, wherein the gasway is
The door apparatus of the coke oven, characterized in that the tapered in the direction of the body frame on one side of the first heat-resistant block comprises an inclined surface to expand the space formed between the inner wall surface of the carbonization chamber.