Converter flue gas sealing system

Abstract

The utility model relates to a converter flue gas sealing system, and belongs to the field of ferrous metallurgy. The converter smoke sealing system comprises a smoke isolation chamber arranged in the closed smoke exhaust area and a converter smoke hood communicating the closed smoke exhaust area with the open smoke exhaust area. The smoke isolation chamber comprises a fire barrier arranged around the converter, the converter ceiling covers the top end of the fire barrier, and the smoke isolation chamber ceiling is arranged at the top of the fire barrier and located below the converter ceiling; the converter smoke hood comprises a first smoke hood which penetrates through the converter ceiling and the smoke isolation chamber ceiling and then covers the position above a converter mouth of the converter, and the side wall of the first smoke hood is connected with the converter ceiling and the smoke isolation chamber ceiling in a sealed mode; an air injection pipeline and an exhaust pipeline are arranged on the converter ceiling and arranged on the two sides of the first smoke hood respectively, the air injection pipeline is connected with a cold air fan, and the exhaust pipeline is connected with an integrated dust remover. Air cooling is added between the smoke isolation chamber and the furnace top, and the problems that the service life is shortened, and deformation and damage are caused due to heat concentration of the smoke isolation chamber are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of iron and steel metallurgy and relates to a converter flue gas sealing system. Background Technology

[0002] Below the converter is a closed flue gas area, within which a smoke-isolating chamber is installed. This chamber includes a fire-resistant wall surrounding the converter and a smoke-isolating chamber roof covering the top of the fire-resistant wall. Above the converter is an open flue gas area, typically vented by a converter hood. The converter hood connects the closed and open flue gas areas to guide the orderly discharge of high-temperature flue gas. The smoke-isolating chamber, together with the converter roof and the converter hood, constitute a sealed flue gas system, ensuring that high-temperature flue gas is discharged only through the converter hood, preventing it from escaping through other pathways and causing environmental pollution.

[0003] Even though most of the high-temperature flue gas generated during the smelting process in the converter can be discharged through the converter hood, some high-temperature flue gas still accumulates in the smoke isolation chamber during the exhaust process. This causes the steel structure of the smoke isolation chamber to deform and be damaged due to heat accumulation, affecting the overall sealing effect.

[0004] In addition, because the smoke extraction height of the converter hood needs to be frequently changed during the production process, movable hoods that can be raised and lowered vertically are often used. During the raising and lowering of the movable hood, there are gaps between the outer surface of the movable hood and the roof of the smoke isolation chamber and the roof of the converter. High-temperature flue gas inevitably escapes from the gaps, making it impossible to effectively seal off the high-temperature flue gas in the converter. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a converter flue gas sealing system to solve the problem of deformation and damage to the steel structure of the flue gas isolation chamber due to the heat accumulation of high-temperature flue gas.

[0006] To achieve the above objectives, this utility model provides a converter flue gas sealing system, including a smoke isolation chamber disposed in a closed flue gas zone and a converter hood connecting the closed flue gas zone and the open flue gas zone.

[0007] The smoke isolation chamber includes a fire baffle wall surrounding the converter, with the converter roof covering the top of the fire baffle wall, and the smoke isolation chamber roof located on top of the fire baffle wall and below the converter roof.

[0008] The converter hood includes a first hood that passes through the converter roof and the smoke-insulating chamber roof and covers the top of the converter. The sidewalls of the first hood are sealed to the converter roof and the smoke-insulating chamber roof.

[0009] An air injection pipe and an air exhaust pipe are installed on the top of the converter. The air injection pipe and the air exhaust pipe are located on both sides of the first fume hood. The air injection pipe is connected to the cold air fan, and the air exhaust pipe is connected to the integrated dust collector.

[0010] Optionally, the first fume hood has a first sidewall, which bends outward and upward at the lower opening to form a second sidewall, and the second sidewall is sealed to the converter roof and the smoke-proof chamber roof.

[0011] Optionally, a movable fume hood is installed inside the first fume hood in a vertically lifting manner, with one end slidably connected to the inner wall of the first fume hood and the other end extending towards the converter opening.

[0012] Optionally, the radius of the movable fume hood gradually increases towards the furnace opening of the converter.

[0013] Optionally, the movable fume hood is slidably connected to the inner wall of the first fume hood via a lifting mechanism. The lifting mechanism includes a hydraulic push rod disposed between the converter roof and the smoke-insulating chamber roof and located outside the first fume hood. The hydraulic push rod passes through the smoke-insulating chamber roof and enters the smoke-insulating chamber. The end of the hydraulic push rod is connected to an L-shaped connector extending into the interior of the first fume hood. The movable fume hood is fixed on the L-shaped connector.

[0014] Optionally, the L-shaped connector is also provided with a guide wheel that slides with the inner wall of the first smoke hood, and the movable smoke hood is located below the guide wheel.

[0015] Optionally, the hydraulic push rod is provided with a sealing cover, the projection of the sealing cover on the ceiling of the smoke-proof chamber covering the entry point of the hydraulic push rod on the ceiling of the smoke-proof chamber.

[0016] Optionally, a vertical guard plate is also provided between the smoke-proof chamber roof and the converter roof. The vertical guard plate connects the end of the smoke-proof chamber roof and the end of the converter roof, and the second side wall is sealed to the top of the vertical guard plate near the converter roof.

[0017] Optionally, the L-shaped connector extends between the second side wall and the upright guard plate, and the guide wheel is slidably connected to the second side wall.

[0018] Optionally, an annular nitrogen sealing pipe is provided between the second side wall and the vertical guard plate, with multiple nozzles arranged toward the center of the converter.

[0019] Optionally, the converter fume hood may also include a second fume hood disposed above the converter roof, the second fume hood being detachably connected to the first fume hood.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention incorporates air cooling between the smoke isolation chamber and the furnace top, preventing reduced lifespan and deformation damage caused by heat concentration in the smoke isolation chamber, and improving airtightness by maintaining the overall structure of the smoke isolation chamber. Furthermore, this invention also includes a nitrogen-sealing pipe between the second side wall and the vertical guard plate, which not only prevents high-temperature flue gas from escaping from the connection between the movable smoke hood and the first smoke hood, but also seals the gap between the movable smoke hood and the smoke isolation chamber.

[0022] In addition, the converter fume hood provided by this utility model is set up separately for the movable fume hood and the first fume hood. The first fume hood is sealed to the converter roof and the roof of the smoke isolation chamber. Its first side wall and second side wall form a U-shaped bend at the bottom opening. The movable fume hood is controlled by a lifting mechanism set outside the first fume hood. The L-shaped connector keeps the movable fume hood within the coverage area of ​​the first fume hood and slides on the inner wall of the first fume hood. The height of the movable fume hood can be adjusted without affecting the airtightness.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of the converter smoke isolation chamber sealing system provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the converter fume hood provided by this utility model;

[0027] Figure 3 A schematic diagram of the nitrogen supply pipeline of the sealed system for the converter smoke isolation chamber provided by this utility model;

[0028] Figure 4 This is a simplified structural diagram of a nitrogen supply system.

[0029] Figure label:

[0030] 1-Movable fume hood; 2-First fume hood; 2.1-First side wall; 2.2-Second side wall; 3-Second fume hood; 4-Lifting mechanism; 4.1-Hydraulic push rod; 4.2-Sealing cover; 5-L-type connector; 5.1-Lifting lug; 5.2-Guide wheel; 6-Converter; 7-Firewall; 8-Fume hood roof; 9-Nitrogen sealing pipe; 10-Vertical guard plate; 11-Transverse trolley; 12-Nitrogen supply pipe; 13-Nozzle; 14-Converter roof; 15-Manual valve; 16-Regulating valve; 17-Shut-off valve; 18-Flow meter; 19-Check valve; 20-Fan; 21-Air injection pipe; 22-Integrated dust collector; 23-Exhaust pipe. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] This utility model provides a converter flue gas sealing system, including a smoke isolation chamber and a converter fume hood. Figure 1As shown, the smoke-isolating chamber includes a fire-resistant wall 7 and a smoke-isolating chamber roof 8. The fire-resistant wall 7 is located around the converter 6 and between the converter roof 14 and the converter 6 platform. The smoke-isolating chamber roof 8 is located at the top of the fire-resistant wall 7, and its position is lower than the converter roof 14. The fire-resistant wall 7 and the smoke-isolating chamber roof 8 enclose the smoke-isolating chamber area. The area below the converter 6 is a closed smoke exhaust zone, and the area above the converter 6 is an open smoke exhaust zone. The converter fume hood connects the closed smoke exhaust zone and the open smoke exhaust zone to guide the high-temperature flue gas generated by the converter 6 from the closed smoke exhaust zone to the open exhaust zone for discharge while maintaining the airtightness of the smoke-isolating chamber. Furthermore, an air injection pipe 21 and an air exhaust pipe 23 are opened on the converter roof 14, and the air injection pipe 21 and the air exhaust pipe 23 are respectively located on both sides of the first fume hood 2. The cold air fan 20 is located outside the smoke-isolating chamber, and the integrated dust collector 22 is located on the converter roof 14. The air injection duct 21 is connected to the cold air fan 20, and the exhaust duct 23 is connected to the integrated dust collector 22. The cold air fan 20 blows cold air into the smoke isolation chamber and the converter roof 14 through the air injection duct 21, and then connects to the integrated dust collector 22 through the exhaust duct 23. After filtering the dust inside the smoke isolation chamber, the hot air is discharged, preventing the overflow dust from the converter 6 from rising into the converter tower area. The converter flue gas sealing system provided by this utility model can exchange heat in the smoke isolation chamber, avoiding problems such as deformation and damage caused by heat accumulation in the smoke isolation chamber.

[0035] like Figure 2 As shown, the converter fume hood includes a first fume hood 2 that extends from top to bottom through the converter roof 14 and the flue gas chamber roof 8, covering the furnace opening of the converter 6. The first fume hood 2 is located below the converter roof 14. The movable fume hood 1 also includes a second fume hood 3, located above the converter roof 14. The first fume hood 2 and the second fume hood 3 are detachably connected, with the converter roof 14 as the boundary. A transverse trolley 11 is provided on the converter roof 14, connected to the bottom end of the side wall of the second fume hood 3. The second fume hood 3 is placed on the transverse trolley 11, and the second fume hood 3 can be moved away by moving the transverse trolley 11 during converter 6 maintenance.

[0036] Furthermore, the sidewall of the first fume hood 2 is sealed to the converter roof 14 and the flue gas purifier roof 8. The first fume hood 2 has a downwardly extending first sidewall 2.1, which bends outward and upward at its lower opening to form a second sidewall 2.2. The first sidewall 2.1 and the second sidewall 2.2 form a U-shaped bend, and the second sidewall 2.2 is sealed to the converter roof 14 and the flue gas purifier roof 8. A vertical guard plate 10 is also provided between the flue gas purifier roof 8 and the converter roof 14, sealing the ends of the flue gas purifier roof 8 and the converter roof 14. The second sidewall 2.2 is sealed to the vertical guard plate 10.

[0037] The converter fume hood also includes a movable fume hood 1, which is vertically adjustable and installed inside the first fume hood 2. One end of the movable fume hood 1 is slidably connected to the inner wall of the first fume hood 2, and the other end extends towards the converter 6 furnace opening. Preferably, the radius of the movable fume hood 1 gradually increases along the vertical direction to achieve better smoke extraction. The movable fume hood 1 is raised and lowered by a lifting mechanism 4, which is located between the converter roof 14 and the smoke-insulating chamber roof 8 and outside the first fume hood 2. The lifting mechanism 4 includes a hydraulic push rod 4.1, which passes through the smoke-insulating chamber roof 8 and enters the smoke-insulating chamber. The end of the hydraulic push rod 4.1 is connected to an L-shaped connector 5 extending into the interior of the first fume hood 2, and the movable fume hood 1 is fixed to the L-shaped connector 5. A sealing cover 4.2 is provided outside the hydraulic push rod 4.1. The projection of the sealing cover 4.2 on the smoke-insulating chamber roof 8 completely covers the entrance of the hydraulic push rod 4.1 on the smoke-insulating chamber roof 8 to prevent high-temperature flue gas from leaking from the entrance. The L-shaped connector 5 is also equipped with a guide wheel 5.2 that slides against the inner wall of the first smoke hood 2. The movable smoke hood 1 is located below the guide wheel 5.2. Further, the L-shaped connector 5 extends between the second side wall 2.2 and the vertical guard plate 10, with the guide wheel 5.2 slidably connected to the second side wall 2.2. A lifting lug 5.1 is provided at the end of the L-shaped connector 5 near the hydraulic push rod 4.1, and the L-shaped connector 5 is connected to the hydraulic push rod 4.1 via the lifting lug 5.1. When the hydraulic push rod 4.1 extends or retracts, it will cause the L-shaped connector 5 to rise and fall vertically, thereby causing the guide wheel 5.2 to slide on the second side wall 2.2 of the first smoke hood 2, and thus causing the movable smoke hood 1 to rise and fall vertically, achieving the purpose of adjusting the height of the movable smoke hood 1.

[0038] like Figure 2 , Figure 3 As shown, an annular nitrogen sealing pipe 9 is also provided between the second side wall 2.2 and the vertical guard plate 10, with multiple nozzles 13 arranged towards the center of the converter 6. The nitrogen sealing pipe 9 is connected to the external nitrogen supply pipe 12, and prevents high-temperature flue gas from leaking from the gap between the movable fume hood 1 and the second side wall 2.2 into the space between the second side wall 2.2 and the vertical guard plate 10 by injecting nitrogen gas into the space between the second side wall 2.2 and the vertical guard plate 10.

[0039] In some embodiments of this utility model, the nitrogen supply pipe 12 is connected from the nitrogen system, such as... Figure 4 As shown, a manual valve 15, a regulating valve 16, a shut-off valve 17, a flow meter 18, and a check valve 19 are sequentially installed along the nitrogen flow direction on the nitrogen supply pipeline 12 to regulate the nitrogen flow rate and the start and stop of nitrogen supply. The manual valve 15, for maintenance purposes, should remain normally open. When the movable fume hood 1 descends to the working position, the shut-off valve 17 is opened to provide a nitrogen flow path, and the regulating valve 16 is opened to the set valve position. The flow meter 18 monitors the flow rate in the nitrogen supply pipeline 12 in real time, and the check valve 19 ensures that the nitrogen entering the nitrogen sealing pipeline 9 does not flow back, guaranteeing system safety.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A converter flue gas sealing system, characterized in that: This includes a smoke-isolating chamber located within a closed smoke exhaust area and a converter hood connecting the closed smoke exhaust area and the open smoke exhaust area; The smoke isolation chamber includes a fire wall (7) disposed around the converter (6), a converter roof (14) covering the top of the fire wall (7), and a smoke isolation chamber roof (8) disposed on the top of the fire wall (7) and located below the converter roof (14). The converter hood includes a first hood (2) that passes through the converter roof (14) and the smoke-proof chamber roof (8) and covers the furnace opening of the converter (6). The sidewall of the first hood (2) is sealed to the converter roof (14) and the smoke-proof chamber roof (8). An air injection pipe (21) and an air exhaust pipe (23) are provided on the converter roof (14). The air injection pipe (21) and the air exhaust pipe (23) are respectively located on both sides of the first fume hood (2). The air injection pipe (21) is connected to the cold air fan (20), and the air exhaust pipe (23) is connected to the integrated dust collector (22).

2. The sealed system according to claim 1, characterized in that: The first fume hood (2) has a first side wall (2.1), which bends outward and upward at the lower opening to form a second side wall (2.2), and the second side wall (2.2) is sealed to the converter roof (14) and the smoke isolation chamber roof (8).

3. The sealed system according to claim 2, characterized in that: The first fume hood (2) has a movable fume hood (1) installed inside in a vertical lifting manner. One end of the movable fume hood (1) is slidably connected to the inner wall of the first fume hood (2), and the other end extends toward the furnace opening of the converter (6).

4. The sealed system according to claim 3, characterized in that: The movable fume hood (1) is slidably connected to the inner wall of the first fume hood (2) via a lifting mechanism (4). The lifting mechanism (4) includes a hydraulic push rod (4.1) disposed between the converter roof (14) and the smoke-proof chamber roof (8) and located outside the first fume hood (2). The hydraulic push rod (4.1) passes through the smoke-proof chamber roof (8) and enters the smoke-proof chamber. The end of the hydraulic push rod (4.1) is connected to an L-shaped connector (5) extending into the interior of the first fume hood (2). The movable fume hood (1) is fixed on the L-shaped connector (5).

5. The sealed system according to claim 4, characterized in that: The L-shaped connector (5) is also provided with a guide wheel (5.2) that slides with the inner wall of the first smoke hood (2), and the movable smoke hood (1) is located below the guide wheel (5.2).

6. The sealed system according to claim 4, characterized in that: The hydraulic push rod (4.1) is provided with a sealing cover (4.2) on the outside. The projection of the sealing cover (4.2) on the ceiling (8) of the smoke-proof chamber covers the entrance of the hydraulic push rod (4.1) on the ceiling (8) of the smoke-proof chamber.

7. The sealed system according to claim 5, characterized in that: A vertical guard plate (10) is also provided between the smoke-proof chamber roof (8) and the converter roof (14). The vertical guard plate (10) connects the end of the smoke-proof chamber roof (8) and the end of the converter roof (14). The second side wall (2.2) is sealed to the top of the vertical guard plate (10) near the top of the converter roof (14).

8. The sealed system according to claim 7, characterized in that: The L-shaped connector (5) extends between the second side wall (2.2) and the upright guard plate (10), and the guide wheel (5.2) is slidably connected to the second side wall (2.2).

9. The sealed system according to any one of claims 7 or 8, characterized in that: An annular nitrogen sealing pipe (9) is also provided between the second side wall (2.2) and the vertical guard plate (10), and multiple nozzles (13) are provided on it and arranged toward the center of the converter (6).

10. The sealed system according to any one of claims 1 to 6, characterized in that: The converter hood also includes a second hood (3) disposed above the converter roof (14), and the second hood (3) is detachably connected to the first hood (2).

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