Converter smoke hood and converter smoke isolation chamber sealing system with same

Abstract

The invention relates to a converter smoke hood and a converter smoke isolation chamber sealing system with the same, and belongs to the field of ferrous metallurgy. 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 converter mouth, a movable smoke hood is arranged in the first smoke hood in a vertical lifting mode, the radius of the movable smoke hood is gradually increased towards the converter mouth, one end of the movable smoke hood is connected to the inner wall of the first smoke hood in a sliding mode, and the other end of the movable smoke hood extends towards the converter mouth. The invention further provides a converter smoke isolation chamber sealing system which comprises the converter smoke hood. The air injection pipeline and the exhaust pipeline are arranged on the converter ceiling, the air injection pipeline is connected with the cold air fan, and the exhaust pipeline is connected with the integrated dust remover. According to the converter smoke hood, the movable smoke hood body and the first smoke hood body are arranged in a split mode, and the height of the movable smoke hood body is adjusted while the air tightness is not affected; air cooling is added between the smoke isolation chamber and the furnace top, and deformation and damage of the smoke isolation chamber caused by heat insulation amount concentration are avoided.

Description

Technical Field

[0001] The invention belongs to the field of iron and steel metallurgy, and relates to a converter smoke hood and a converter smoke isolation chamber closed system having the same. Background Art

[0002] During the smelting production process, it is necessary to connect a smoke hood above the converter to guide the high-temperature flue gas, and set a smoke isolation chamber around the converter to prevent the high-temperature flue gas from overflowing. The smoke isolation chamber usually includes a fire barrier wall and a smoke isolation chamber ceiling. The fire barrier wall is arranged around the converter and is located between the converter ceiling and the converter platform. The smoke isolation chamber ceiling is arranged at the top of the fire barrier wall, and its setting position is lower than the converter ceiling. The fire barrier wall and the smoke isolation chamber ceiling enclose a smoke isolation chamber area. The converter smoke hood enters the smoke isolation chamber through the converter ceiling. In order to adjust the smoking height to capture more flue gas, the converter smoke hood is usually configured as a movable smoke hood that can be lifted vertically. However, during the lifting process of the movable smoke hood, there is a gap between the outer surface of the movable smoke hood and the smoke isolation chamber ceiling and the converter ceiling. The high-temperature flue gas inevitably overflows from the gap, causing serious environmental pollution. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a converter smoke hood and a smoke isolation chamber sealing system having the same, so as to prevent high-temperature smoke from overflowing from the connection between the movable smoke hood and the smoke isolation chamber, thereby improving the effectiveness of the sealing of the converter smoke isolation chamber.

[0004] To achieve the above object, the present invention provides a converter smoke hood, comprising a first smoke hood that passes through the converter ceiling and the smoke isolation chamber ceiling and covers the converter furnace mouth, and the side wall of the first smoke hood is tightly connected to the converter ceiling and the smoke isolation chamber ceiling. A movable smoke hood is arranged inside the first smoke hood in a vertically lifting manner, one end of which is slidably connected to the inner wall of the first smoke hood and the other end extends toward the converter furnace mouth.

[0005] Optionally, the radius of the movable smoke hood gradually increases toward the furnace opening of the converter.

[0006] Optionally, the movable smoke hood is slidably connected to the inner wall of the first smoke hood through a lifting mechanism, the lifting mechanism includes a hydraulic push rod arranged between the converter ceiling and the smoke isolation chamber ceiling and located outside the first smoke hood, the hydraulic push rod passes through the smoke isolation chamber ceiling and enters the smoke isolation chamber, the end of the hydraulic push rod is connected to an L-shaped connector extending to the interior of the first smoke hood, and the movable smoke hood is fixed on the L-shaped connector.

[0007] Optionally, the L-shaped connecting piece is further provided with a guide wheel which is slidably matched with the inner wall of the first smoke hood, and the movable smoke hood is arranged below the guide wheel.

[0008] Optionally, a sealing cover is provided on the outside of the hydraulic push rod, and the projection of the sealing cover on the ceiling of the smoke-proof chamber covers the penetration opening of the hydraulic push rod on the ceiling of the smoke-proof chamber.

[0009] Optionally, the first smoke hood has a first side wall, the first side wall is bent outward and upward at the lower opening to form a second side wall, and the second side wall is tightly connected to the converter ceiling and the smoke isolation chamber ceiling.

[0010] Optionally, a vertical guard plate is provided between the smoke isolation chamber ceiling and the converter ceiling, the vertical guard plate connects the end of the smoke isolation chamber ceiling and the end of the converter ceiling, and the second side wall is sealedly connected to the top of the vertical guard plate near the converter ceiling.

[0011] Optionally, the L-shaped connecting piece extends between the second side wall and the vertical guard plate, and the guide wheel is slidably connected to the second side wall.

[0012] Optionally, an annular nitrogen sealing pipe is provided between the second side wall and the vertical guard plate, on which a plurality of nozzles arranged toward the center of the converter are provided.

[0013] Optionally, the converter smoke hood also includes a second smoke hood arranged above the converter ceiling, and the second smoke hood is detachably connected to the first smoke hood.

[0014] The present invention also provides a converter smoke isolation chamber closed system, comprising the above-mentioned converter smoke hood and an air injection duct and an exhaust duct opened on the converter ceiling, wherein the air injection duct and the exhaust duct are respectively arranged on both sides of the first smoke hood.

[0015] Optionally, the air injection duct is connected to the cold air fan, and the exhaust duct is connected to the integrated dust collector.

[0016] The beneficial effects of the present invention are:

[0017] The converter smoke hood provided by the present invention has a movable smoke hood and a first smoke hood separately arranged. The first smoke hood is tightly connected to the converter ceiling and the smoke isolation chamber ceiling, and its first side wall and the second side wall form a U-shaped elbow at the bottom opening. The movable smoke hood controls its height position by a lifting mechanism arranged outside the first smoke hood, and the setting position of the movable smoke hood is maintained within the covering range of the first smoke hood through an L-shaped connecting piece, and slides on the inner wall of the first smoke hood, thereby realizing height adjustment of the movable smoke hood without affecting the air tightness.

[0018] Furthermore, the present invention also provides a nitrogen sealing pipe between the second side wall and the vertical guard plate, which can not only prevent high-temperature smoke from overflowing from the connection between the movable smoke hood and the first smoke hood, but also seal the gap between the movable smoke hood and the smoke isolation chamber.

[0019] In addition, the present invention adds air cooling between the smoke isolation chamber and the furnace top to avoid reduced service life and deformation damage due to heat concentration in the smoke isolation chamber, and improves airtightness by maintaining the overall structure of the smoke isolation chamber.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 A schematic structural diagram of a converter smoke isolation chamber closed system provided by the present invention;

[0023] Figure 2 A schematic diagram of the structure of a converter smoke hood provided by the present invention;

[0024] Figure 3 A schematic diagram of the structure of a nitrogen supply pipeline of a converter smoke isolation chamber closed system provided by the present invention;

[0025] Figure 4 It is a simplified structural diagram of the nitrogen supply system.

[0026] Reference numerals:

[0027] 1- movable smoke hood; 2- first smoke hood; 2.1- first side wall; 2.2- second side wall; 3- second smoke hood; 4- lifting mechanism; 4.1- hydraulic push rod; 4.2- sealing hood; 5- L-type connector; 5.1- lifting ear; 5.2- guide wheel; 6- converter; 7- fire retaining wall; 8- ceiling of smoke isolation chamber; 9- nitrogen sealing pipeline; 10- vertical guard plate; 11- horizontal movement trolley; 12- nitrogen supply pipeline; 13- nozzle; 14- converter ceiling; 15- manual valve; 16- regulating valve; 17- cut-off valve; 18- flow meter; 19- check valve; 20- fan; 21- air injection pipeline; 22- integrated dust collector; 23- exhaust duct. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways 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 only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The present invention provides a converter smoke hood and a smoke isolation chamber sealing system having the same, so as to prevent high-temperature smoke from overflowing from the connection between the movable smoke hood 1 and the smoke isolation chamber, thereby improving the effectiveness of sealing the converter smoke isolation chamber.

[0032] like Figure 1 As shown, the smoke-proof chamber includes a fire retaining wall 7 and a smoke-proof chamber ceiling 8. The fire retaining wall 7 is arranged around the converter 6 and between the converter ceiling 14 and the converter 6 platform. The smoke-proof chamber ceiling 8 is arranged at the top of the fire retaining wall 7, and its setting position is lower than the converter ceiling 14. The fire retaining wall 7 and the smoke-proof chamber ceiling 8 enclose a smoke-proof chamber area. Below the converter 6 is a closed smoke exhaust area, and above the converter 6 is an open smoke exhaust area. The converter smoke hood provided by the present invention can guide the high-temperature smoke generated by the converter 6 from the closed smoke exhaust area to the open exhaust area for discharge while maintaining the airtightness of the smoke-proof chamber.

[0033] like Figure 2 As shown, the converter smoke hood provided by the present invention includes a first smoke hood 2 that passes through the converter ceiling 14 and the smoke isolation chamber ceiling 8 from top to bottom and covers the top of the furnace mouth of the converter 6. The first smoke hood 2 is arranged below the converter ceiling 14. The movable smoke hood 1 also includes a second smoke hood 3, which is arranged above the converter ceiling 14. The first smoke hood 2 and the second smoke hood 3 are separated by the converter ceiling 14, and the two are detachably connected. A transverse trolley 11 connected to the bottom end of the side wall of the second smoke hood 3 is arranged on the converter ceiling 14. The second smoke hood 3 is placed on the transverse trolley 11. When the converter 6 is repaired, the second smoke hood 3 is removed by moving the transverse trolley 11.

[0034] Furthermore, the side wall of the first smoke hood 2 is tightly connected to the converter ceiling 14 and the smoke isolation chamber ceiling 8. The first smoke hood 2 has a first side wall 2.1 extending downward, the first side wall 2.1 is bent outward and upward at the lower opening to form a second side wall 2.2, the first side wall 2.1 and the second side wall 2.2 form a U-shaped elbow, and the second side wall 2.2 is tightly connected to the converter ceiling 14 and the smoke isolation chamber ceiling 8. A vertical guard plate 10 is also provided between the smoke isolation chamber ceiling 8 and the converter ceiling 14, the vertical guard plate 10 tightly connects the end of the smoke isolation chamber ceiling 8 and the end of the converter ceiling 14, and the second side wall 2.2 is tightly connected to the vertical guard plate 10.

[0035] The converter smoke hood provided by the present invention also includes a movable smoke hood 1, which is arranged inside the first smoke hood 2 in a vertically liftable manner, one end of which is slidably connected to the inner wall of the first smoke hood 2, and the other end extends to the furnace mouth of the converter 6. Preferably, the radius of the movable smoke hood 1 gradually increases in the vertical direction to achieve a better smoking effect. The movable smoke hood 1 is lifted and lowered by a lifting mechanism 4, which is arranged between the converter ceiling 14 and the smoke isolation chamber ceiling 8 and is located outside the first smoke hood 2. The lifting mechanism 4 includes a hydraulic push rod 4.1, which passes through the smoke isolation chamber ceiling 8 and enters the smoke isolation chamber. The end of the hydraulic push rod 4.1 is connected to an L-shaped connector 5 extending to the inside of the first smoke hood 2, and the movable smoke hood 1 is fixed on the L-shaped connector 5. A sealing cover 4.2 is arranged outside the hydraulic push rod 4.1, and the projection of the sealing cover 4.2 on the smoke isolation chamber ceiling 8 completely covers the penetration of the hydraulic push rod 4.1 on the smoke isolation chamber ceiling 8 to prevent high-temperature flue gas from leaking from the penetration. The L-shaped connector 5 is also provided with a guide wheel 5.2 that slidably cooperates with the inner wall of the first smoke hood 2, and the movable smoke hood 1 is arranged below the guide wheel 5.2. Furthermore, the L-shaped connector 5 extends between the second side wall 2.2 and the vertical guard plate 10, and the guide wheel 5.2 is slidably connected to the second side wall 2.2. A lifting ear 5.1 is provided at one end of the L-shaped connector 5 close to the hydraulic push rod 4.1, and the L-shaped connector 5 is connected to the hydraulic push rod 4.1 through the lifting ear 5.1. When the hydraulic push rod 4.1 is extended or retracted, it will drive the L-shaped connector 5 to rise and fall in the vertical direction, thereby driving the guide wheel 5.2 to slide on the second side wall 2.2 of the first smoke hood 2, and then driving the movable smoke hood 1 to rise and fall in the vertical direction, so as to achieve the purpose of adjusting the height of the movable smoke hood 1.

[0036] like Figure 2 , Figure 3 As shown, an annular nitrogen sealing pipe 9 is further provided between the second side wall 2.2 and the vertical guard plate 10, on which a plurality of nozzles 13 arranged toward the center of the converter 6 are opened. The nitrogen sealing pipe 9 is connected to an external nitrogen supply pipe 12, and nitrogen is sprayed between the second side wall 2.2 and the vertical guard plate 10 to prevent high-temperature flue gas from escaping from the gap between the movable smoke hood 1 and the second side wall 2.2 to between the second side wall 2.2 and the vertical guard plate 10.

[0037] The present invention also provides a converter 6 smoke isolation chamber closed system, such as Figure 1 As shown, the converter smoke hood mentioned above also includes an air injection duct 21 and an exhaust duct 23 opened on the converter ceiling 14, and the air injection duct 21 and the exhaust duct 23 are respectively arranged on both sides of the first smoke hood 2. The cold air fan 20 is arranged outside the smoke isolation chamber, and the integrated dust collector 22 is arranged on the converter ceiling 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 ceiling 14 through the air injection duct 21, and is connected 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 to prevent the overflow of smoke produced by the converter 6 from entering the converter tower area upward. The smoke isolation chamber closed system provided by the present invention can perform heat exchange on the smoke isolation chamber to avoid deformation and damage of the smoke isolation chamber due to heat accumulation.

[0038] In some embodiments of the present invention, the nitrogen supply pipeline 12 is connected from a 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 arranged on the nitrogen supply pipeline 12 along the nitrogen flow direction to adjust the flow rate of nitrogen and the start and stop of nitrogen supply. The manual valve 15 should be kept open for maintenance. When the movable fume hood 1 is lowered 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 input into the nitrogen sealing pipeline 9 does not flow back and ensure the safety of the system.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A converter hood, characterized in that: It comprises a first smoke hood (2) that passes through a converter ceiling (14) and a smoke isolation chamber ceiling (8) and covers the top of a furnace opening of a converter (6), wherein the side wall of the first smoke hood (2) is tightly connected to the converter ceiling (14) and the smoke isolation chamber ceiling (8); A movable smoke hood (1) is arranged inside the first smoke hood (2) in a vertically lifting manner, one end of which is slidably connected to the inner wall of the first smoke hood (2) and the other end of which extends toward the furnace opening of the converter (6).

2. The converter smoke hood according to claim 1, characterized in that: The movable smoke hood (1) is slidably connected to the inner wall of the first smoke hood (2) via a lifting mechanism (4); the lifting mechanism (4) comprises a hydraulic push rod (4.1) arranged between the converter ceiling (14) and the smoke isolation chamber ceiling (8) and located outside the first smoke hood (2); the hydraulic push rod (4.1) passes through the smoke isolation chamber ceiling (8) and enters the smoke isolation chamber; the end of the hydraulic push rod (4.1) is connected to an L-shaped connector (5) extending to the inside of the first smoke hood (2); the movable smoke hood (1) is fixed on the L-shaped connector (5).

3. The converter smoke hood according to claim 2, characterized in that: The L-shaped connecting piece (5) is also provided with a guide wheel (5.2) which is slidably matched with the inner wall of the first smoke hood (2), and the movable smoke hood (1) is arranged below the guide wheel (5.2).

4. The converter smoke hood according to claim 2 or 3, characterized in that: A sealing cover (4.2) is arranged outside the hydraulic push rod (4.1), and the projection of the sealing cover (4.2) on the ceiling (8) of the smoke isolation chamber covers the penetration opening of the hydraulic push rod (4.1) on the ceiling (8) of the smoke isolation chamber.

5. The converter smoke hood according to claim 3, characterized in that: The first smoke hood (2) has a first side wall (2.1), the first side wall (2.1) is bent outward and upward at a lower opening to form a second side wall (2.2), and the second side wall (2.2) is tightly connected to the converter ceiling (14) and the smoke isolation chamber ceiling (8).

6. The converter smoke hood according to claim 5, characterized in that: A vertical guard plate (10) is also provided between the smoke isolation chamber ceiling (8) and the converter ceiling (14), and the vertical guard plate (10) connects the end of the smoke isolation chamber ceiling (8) and the end of the converter ceiling (14), and the second side wall (2.2) is tightly connected to the vertical guard plate (10) near the top of the converter ceiling (14).

7. The converter smoke hood according to claim 6, characterized in that: The L-shaped connecting member (5) extends between the second side wall (2.2) and the vertical guard plate (10), and the guide wheel (5.2) is slidably connected to the second side wall (2.2).

8. The converter hood according to claim 6, 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), on which a plurality of nozzles (13) arranged toward the center of the converter (6) are provided.

9. The converter smoke hood according to claim 1, characterized in that: The converter smoke hood also includes a second smoke hood (3) arranged above the converter ceiling (14), and the second smoke hood (3) is detachably connected to the first smoke hood (2).

10. A converter smoke isolation chamber closed system, characterized in that: It comprises a converter smoke hood as described in any one of claims 1 to 9, and an air injection duct (21) and an exhaust duct (23) opened on the converter ceiling (14), wherein the air injection duct (21) and the exhaust duct (23) are arranged on both sides of the first smoke hood (2), wherein the air injection duct (21) is connected to a cold air blower (20), and the exhaust duct (23) is connected to an integrated dust collector (22).

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