KR101520825B1 - Apparatus and method for guiding coke - Google Patents

Abstract

According to an embodiment of the present invention, a coke oven comprises a prechamber having openings formed at upper and lower portions thereof, respectively; A bucket for loading the gaseous coke into the pre-chamber through the upper opening; And a charging sub-unit installed at an upper end of the inner surface of the pre-chamber and charging the coke into the center of the prechamber.

Description

Technical Field [0001] The present invention relates to a coke induction device and a coke induction method using the same,

The present invention relates to a coke inducing device and a coke inducing method using the same, and more particularly, to a device for efficiently inducing coke to be charged into a prechamber of a dry fire extinguishing facility, and a coke- To a method for effectively inducing the same.

The steelmaking process is the preparation stage for steelmaking, and iron ore and coking coal are placed in a blast furnace and hot air is added to produce molten iron.

The coking coal used in the sintering process is generally coke. Coke plays a role both as a heat source for melting iron ore and as a reducing agent for carbon monoxide (CO) generated by combustion of coke.

 The raw material of coke is coal. In order to produce coke, the coal is charged into a coke oven to carry out a dry-out step, and a digestion step in which the gelled coke is cooled in a fire extinguishing system.

Fire extinguishing facilities used in the fire extinguishing phase include a wet fire extinguishing system that extinguishes water from a fire extinguisher and a dry fire extinguishing system that extinguishes an inert gas in an enclosed space. In steelworks, dry fire extinguishing equipment is generally used in terms of environmental protection and energy saving. The dry fire extinguishing system includes a cooling chamber for heat-exchanging heat with an inert gas of the red coke, and a fire extinguisher which is composed of a pre-chamber located above the cooling chamber. The inside of the cooling chamber and the prechamber are built with fire-softening, which enables the glow coke extinguishing in a high-temperature environment.

The glow-in-coke finished coke in the coke oven is loaded onto the bucket and transported to the top of the prechamber. The glow coke is dropped into the prechamber through the upper opening of the prechamber as the flap gate of the bucket is opened.

The glowing coke falling by its own weight bumps against each other and bounces all the way inside the prechamber. The glowing cokes bouncing in all directions collide with the preheating chamber and the inside of the cooling chamber, causing damage to the fireproof casing. Therefore, there is a problem that the refractory porcelain needs to be regularly repaired and thus the operation is interrupted.

The skipping of the glowing coke falling due to its own weight causes breakage of the heat exchanger provided inside the cooling chamber. The water vapor enters into the cooling chamber and the prechamber in accordance with the pipe breakage of the heat exchanger, so that there is a risk of explosion at the time of high temperature cryogenic coke oven. Therefore, there is a problem that the operation is stopped periodically and the abnormality of the heat exchanger installed in the cooling chamber is checked and repaired.

In addition, there is a risk of safety accidents because the maintenance work of refractory softening built in the prechamber and the cooling chamber and the repair work of the heat exchange device inside the cooling chamber mobilize the personnel in the closed space

Korean Patent Registration No. 10-1079450 (November 3, 2011)

It is an object of the present invention to provide an apparatus for effectively introducing coke to be charged into a prechamber of a dry fire extinguishing system to prevent fire damage to the dry fire extinguishing facility and damage caused by wear of the heat exchanger, And to provide a method for efficiently inducing coke to be charged to the inside.

Other objects of the present invention will become more apparent from the following detailed description and drawings.

According to an embodiment of the present invention, a coke oven comprises a prechamber having openings formed at upper and lower portions thereof, respectively; A bucket for loading the gaseous coke into the pre-chamber through the upper opening; And a charging sub-unit installed at an upper end of the inner surface of the pre-chamber and charging the coke into the center of the prechamber.

In the coke oven, a plurality of the charging sub-units may be installed in the circumferential direction on the inner surface of the prechamber.

The charging sub-unit may include a guide plate which is inclined downward toward the center of the prechamber.

The charging sub-unit may further include a cylinder unit for lifting and lowering the guide plate.

Wherein the cylinder unit comprises: a cylinder body having an inner space and an open bottom; A cylinder rod inserted in the inner space and movable along the inner space, the cylinder rod being connected to the guide plate at one end disposed outside the inner space; And a fixing member for fixing the cylinder body to the inner surface of the prechamber.

The coke inducting apparatus may further include: a load sensor installed inside the pre-chamber, the load sensor measuring the load of the coke; And a controller connected to the cylinder unit and controlling the degree of elevation of the guide plate according to the measured amount of the coke.

The coke induction apparatus includes a cooling chamber having a connection port formed at an upper portion thereof and connected to a lower opening of the prechamber; A circulation gas supply pipe connected at one end to the cooling chamber to supply a circulation gas; A circulation gas discharge pipe connected to the cooling chamber at one end to discharge the circulating gas; A boiler installed in the circulation gas discharge pipe and performing heat exchange; And a discharge unit connected to a lower portion of the cooling chamber to discharge the coke that has been extinguished.

According to another embodiment of the present invention, there is provided a method of inducing coke, comprising the steps of: measuring the amount of coke supplied to a prechamber using a load sensor installed in a prechamber; Determining a degree of lift of a guide plate installed on an upper opening of the prechamber in accordance with the measured coke load; A step of raising and lowering the guide plate according to the determined degree of lift; And charging the coke into the prechamber through the guide plate.

Effects of the coke induction apparatus and the coke induction method using the same according to the embodiment of the present invention will be described as follows.

It is possible to improve the phenomenon that the glowing coke that is charged into the dry fire extinguishing system and falls and collides with the preheating chamber formed in the prechamber and the cooling chamber, thereby extending the service life of the fire extinguisher.

There is an effect of preventing the phenomenon that the red coke which is charged into the dry fire extinguishing facility and falls down collides with the heat exchanger inside the cooling chamber, thereby increasing the service life of the heat exchanger and preventing the explosion accident by steam.

It is effective to extend the lifetime of the refractory inside the dry fire extinguishing system and to secure the stability of operation according to the extension of the life of the heat exchanger.

There is an effect of preventing the damage of human casualties due to the maintenance work of the fire prevention furnace built in the prechamber and the cooling chamber and the maintenance work of the heat exchange device installed inside the cooling chamber.

1 is a schematic cross-sectional view of a conventional dry fire extinguishing system.
2 is a perspective view schematically illustrating a loading sub-unit according to an embodiment of the present invention.
3 is a cross-sectional view schematically illustrating a state in which a charging sub-unit is installed in a pre-chamber such that a guide plate is disposed upright in accordance with an embodiment of the present invention.
FIG. 4 is a cross-sectional view schematically illustrating a state in which a guide plate is inclined downward and a loading sub-unit is installed in a lock pre-chamber according to an embodiment of the present invention.
FIG. 5 is a perspective view schematically showing a loading sub-unit installed on a slope inside a prechamber according to an embodiment of the present invention. FIG.
6 is a cross-sectional view schematically showing a descent of a guide plate according to an embodiment of the present invention.
7 is a cross-sectional view schematically showing the lifting of the guide plate according to an embodiment of the present invention.

The present invention relates to a coke inducing device and a coke inducing method using the same, and embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the figures may be exaggerated and exaggerated to emphasize a clearer description.

In order to produce steel products at steel mills, steel mills usually go through steelmaking, steelmaking, performance and rolling processes. In the double refining process, iron ore and coking coal are placed in a blast furnace and hot wind is applied at about 1200 ° C to produce refuse.

Coal coke processed into coal is generally used for the coke to be injected into the blast furnace to produce tungsten. If unprocessed coal is introduced into the blast furnace, coal dust will be blown off, which may interfere with the melting of the iron ore and cause the problem of entanglement with the iron ore. In the blast furnace, coke plays a role as a heat source for melting iron ore. And also serves as a reducing agent for reducing iron oxide in iron oxide state by carbon monoxide (CO) generated when the coke is burned.

The method of producing coke from coal is as follows. Charge the ground coal into a coke oven and heat it to about 1200 ° C for about 16 hours. Coal charged into the coke oven begins to dissolve from the higher temperature portion, where moisture and volatile components are released into the gas, and the temperature of the layer in the molten state rises to a higher temperature. When the hot coke is extruded from the coke oven and it comes into contact with the atmosphere, the hot coke extruded from the coke oven must be extinguished in the fire extinguishing system. In the fire extinguishing system, the red coke is cooled down to about 200 ° C, and the cooled coke is crushed by the crusher and put into the blast furnace.

The fire extinguishing system used in the fire extinguishing process includes a wet fire extinguishing system for spraying water from a fire extinguisher and a dry fire extinguishing system for extinguishing an inert gas by blowing in an enclosed space. The dry fire extinguishing system has the advantage of preventing scattering of coke dust by circulating the cooling gas in the fire extinguishing facility to cool the red coke. It also has the advantage of recovering the sensible heat of the red coke by using a heat exchanger such as a boiler. Therefore, steel mills usually use dry fire extinguishing equipment to protect the environment and save energy.

1 is a schematic cross-sectional view of a conventional dry fire extinguishing system.

As shown in FIG. 1, the cooling tower of the dry fire extinguishing system 1 is composed of a cooling chamber 30 for cooling the glow coke and a prechamber 20 at the upper end of the cooling chamber 30. The gaseous coke 5 that has been completely dried is loaded on the bucket 10 and transported to the top of the prechamber 20 and charged into the cooling tower in accordance with the opening of the flap cate 12 of the bucket 10. The prechamber 20 is installed in the dry fire extinguishing system 1 for the purpose of maintaining the operational stability against the discontinuous supply of the glowing coke 5 due to the charging time variation of the glowing coke 5. [ The preheater 20 and the cooling chamber 20 are provided with a refractory softener so that a smooth operation can be achieved even in a cooling environment in which the heated coke 1 is exposed to the high temperature.

A circulation gas supply pipe 70 is connected to the lower end of the cooling chamber 30 and a circulation gas discharge pipe 60 is connected to the upper end of the cooling chamber 30. The glowing coke (5) is charged into the cooling chamber (30) through the prechamber (20). A blower (75) is connected to the circulation gas supply pipe (70) to supply the cooled inert gas to the cooling chamber (30). An inert gas is supplied into the cooling chamber 30 through the circulation gas supply pipe 70 to choke the red gypsum coke 5 in the cooling chamber 30. During the digestion process, the inert gas absorbs the sensible heat of the gypsum coke (5). The inert gas absorbing the sensible heat in the cooling chamber 30 is discharged from the cooling chamber 30 through the circulation gas discharge pipe 60 and the waste heat is recovered from the boiler 80 connected to the circulation gas discharge pipe 60. The inert gas cooled by the heat exchange is supplied to the inside of the cooling chamber 30 through the circulation gas supply pipe 70 through the dust collecting device 90 so that the gypsum coke 5 is continuously extinguished. In addition, a separate heat exchanger 50 is installed in the cooling chamber 30 to increase the cooling efficiency of the glow-in-coke 5 and increase the heat recovery rate of the dry fire extinguishing system 1. [

The red coke 5 loaded on the bucket 10 at the upper portion of the prechamber 20 falls into the prechamber 20 due to its own weight as the flap gate 12 opens. The red coke (5) falling from the bucket (10) is charged into the fire extinguisher through the upper opening of the prechamber (20).

In the conventional dry fire extinguishing system 1, the red coke 5 falling from the bucket 10 collides with each other and bounces in all directions. The glowing coke 5 that bounces in all directions collides with the preheating chamber 20 and the inside of the cooling chamber 30 to shorten the lifetime of the refractory.

The skidding of the red coke 5 dropped by its own weight causes breakage of the heat exchanger 50 installed in the cooling chamber 30 and shortens the service life of the heat exchanger 50 and the dry fire extinguishing facility 1 ) Of the explosion.

2 is a perspective view schematically illustrating a loading sub-unit according to an embodiment of the present invention.

2, the loading sub-unit 100 includes a guide plate 140 for guiding the falling glow coke 5 to the center of the prechamber 20. As shown in Fig. The guide plate 140 prevents a phenomenon in which the glowing coke 5 is dropped and collides with the refractory steel directly and guides the falling direction of the glowing coke 5 to the heat exchanger 50 ) Of the coke (5) is prevented from directly colliding with the coke (5). The guide plate 140 is made of a material excellent in heat resistance and wear resistance since the high temperature cryogen coke 5 directly impacts.

The loading sub-unit 100 may further include a cylinder unit. The cylinder unit includes a cylinder body 110 and a cylinder rod 130 inserted into the cylinder body 110 and having one end connected to the guide plate 140. The cylinder body 110 is fixed to the inner wall of the prechamber 20 by a fixing member 150. 2 shows an electric cylinder unit in which the drive motor 120 is connected to the cylinder main body 110 as an embodiment of the present invention. However, the cylinder unit of the charging sub-unit 100 is not limited to the electric cylinder unit, Or a pneumatic cylinder unit.

FIG. 3 is a cross-sectional view schematically illustrating a state in which a guide plate is installed upright in a pre-chamber in accordance with an embodiment of the present invention, FIG. 4 is a cross- Sectional view schematically showing a state in which the charging sub-unit is installed in the lock pre-chamber.

As shown in Fig. 3, the loading sub-unit 100 is installed at the upper end of the inner wall of the prechamber 20. The loading sub-unit 100 is installed on the upper opening of the prechamber 20 so that the guide plate 140 is erected. The guide plate 140 protects the preheater 20 and the refractory burned inside the cooling chamber 30 from the flicking of the glowing coke 5 falling downward and the fall direction of the falling glow coke 5 So as to protect the heat exchanger 50 inside the cooling chamber 30.

The charging sub-unit 100 is moved to the pre-chamber 20 so that the guide plate 140 is inclined downward toward the center of the pre-chamber 20 in order to effectively guide the falling cryobalt coke 5 as shown in Fig. ).

FIG. 5 is a perspective view schematically showing a loading sub-unit installed on a slope inside a prechamber according to an embodiment of the present invention. FIG.

The loading sub-unit 100 is not limited to being installed on a slope as shown in Fig. One or more loading sub-units 100 may be installed in the circumferential direction above the inner side surface of the pre-chamber 20 for effective charging depending on the size of the prechamber 20 and the position of the dropping coke 5 of the bucket 10. [ have.

Since the plurality of guide plates 140 are installed along the inner circumferential direction of the prechamber 20, the refractory softening can be effectively protected from the falling cokes 5, So that the breakage of the heat exchanger 50 can be more effectively prevented.

FIG. 6 is a cross-sectional view schematically showing a descent of a guide plate according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view schematically showing a rise of a guide plate according to an embodiment of the present invention.

As shown in Figs. 6 and 7, the pre-chamber 20 is provided with a load sensor 200 capable of measuring the load of the loaded coke 5. As shown in Fig. 6 and 7 show two load sensors 200, two or more load sensors 200 may be installed in the prechamber 20 for more precise measurements.

The load sensor 200 measures the coke load in the prechamber 20. The controller 300 controls the degree of lift of the guide plate 140 according to the amount of coke deposited on the load sensor 200. The driving motor 120 connected to the controller 300 moves up and down the guide plate 140 according to a control signal received from the controller 300.

6, the controller 300 sends a down signal to the driving motor 120 when the coke load amount of the prechamber 20 measured by the load sensor 200 is small. The driving motor 120 descends the cylinder rod 130 in accordance with the down signal and thus the guide plate 140 connected to the cylinder rod 130 descends.

7, the controller 300 sends a rising signal to the driving motor 120 when the amount of coke to be loaded in the prechamber 20 measured by the load sensor 200 is large. The drive motor 120 moves up the cylinder rod 130 in accordance with the rising signal and thus the guide plate 140 connected to the cylinder rod 130 rises.

6 and 7, the degree of elevation of the guide plate 140 is controlled according to the coke load amount of the prechamber 20, so that the glow-white coke 5 falling from the bucket 10 can effectively be introduced into the prechamber 20). Accordingly, it is possible to protect the preheater 20 and the fire extinguisher built in the cooling chamber 30 and to effectively protect the heat exchanger 50 installed inside the cooling chamber 30. [

1: Dry fire extinguishing system 5: Charged coke
10: bucket 12: flap gate
20: Prechamber 30: Cooling chamber
50: heat exchanger 60: circulation gas discharge pipe
70: Circulating gas supply pipe 75: Blower
80: Boiler 90: Dust collector
100: charging auxiliary unit 110: cylinder body
120: drive motor 130: cylinder rod
140: guide plate 150: fixing member
200: load sensor 300: controller

Claims (8)

A pre-chamber in which the coke is charged through an opening formed in the upper portion;
And a guide plate for guiding the coke to the center of the interior of the prechamber, the loading sub-unit being disposed on the opening;
A loading sensor installed inside the prechamber and measuring a loading amount of the coke; And
And a controller connected to the charging sub-unit and controlling the degree of elevation of the guide plate in accordance with the measured amount of the coke. The method according to claim 1,
Wherein a plurality of the charging sub-units are installed in the circumferential direction inside the opening. 3. The method according to claim 1 or 2,
Wherein the guide plate comprises:
Wherein the pre-chamber is inclined downward toward the center of the pre-chamber. The method of claim 3,
The charging sub-
Further comprising a cylinder unit for raising and lowering the guide plate. 5. The method of claim 4,
The cylinder unit includes:
A cylinder body having an inner space and an open bottom;
A cylinder rod inserted in the inner space and movable along the inner space, the cylinder rod being connected to the guide plate at one end disposed outside the inner space; And
And a fixing member for fixing the cylinder body to the inner side surface of the prechamber. delete The method according to claim 1,
The coke inducting device includes:
A cooling chamber disposed below the prechamber and having a cooling space communicating with the interior of the prechamber;
A circulation gas supply pipe connected at one end to the cooling chamber to supply a circulation gas;
A circulation gas discharge pipe connected to the cooling chamber at one end to discharge the circulating gas;
A boiler installed in the circulation gas discharge pipe and performing heat exchange; And
And a discharge unit connected to a lower portion of the cooling chamber to discharge the coke. A measuring step of measuring a loading amount of the coke supplied to the prechamber using a deposition amount sensor installed in the prechamber;
Determining a degree of lift of a guide plate installed on an upper opening of the prechamber in accordance with the measured coke load;
A step of raising and lowering the guide plate according to the determined degree of lift; And
And loading the coke into the prechamber through the guide plate.

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