Smoke extractor for strip hot mill

By designing a smoke exhaust device for strip hot rolling mill, high-temperature flue gas is heat exchanged and condensed, the problem of direct emission of high-temperature flue gas polluting the environment is solved and environmentally friendly emissions are achieved.

CN223288713UActive Publication Date: 2025-09-02HENAN YIRUI NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202422577833.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-24
Publication Date
2025-09-02
Estimated Expiration
2034-10-24

AI Technical Summary

Technical Problem

The high-temperature flue gas generated by the strip hot rolling mill during operation will directly discharge into the atmosphere to cause pollution to the environment.

Method used

A smoke exhaust device for strip hot rolling mill is designed to exchange heat to high-temperature flue gas through smoking components and heat exchange components, so that its temperature is reduced and condensed, reducing the droplet content, and ensuring that the flue gas is discharged into the atmosphere after condensation does not pollute the environment.

Benefits of technology

It effectively reduces the content of liquid droplets in high-temperature flue gas, ensures that the pollution of the exhausted flue gas to the environment is reduced, and environmentally friendly emissions are achieved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of strip hot rolling mills, in particular to a smoke exhaust device for a strip hot rolling mill, which comprises a flue, at least one group of heat exchange component and a smoke suction component, the flue is provided with an air inlet and an air outlet, and the heat exchange component comprises a condenser which is arranged in the flue and is positioned between the air inlet and the air outlet; the smoke suction assembly comprises a fan and a smoke suction structure, an air inlet of the fan is fixedly connected to a smoke outlet of the strip hot mill, and an air outlet of the fan is fixedly connected with an air inlet of the flue through the smoke suction structure. According to the smoke exhaust device for the strip hot rolling mill, heat exchange can be conducted on high-temperature smoke exhausted from the hot rolling mill, the temperature of the high-temperature smoke is reduced, condensed smoke is obtained, and the content of liquid drops in the high-temperature smoke is effectively reduced; and after condensation, the smoke with reduced liquid drop content is discharged into the atmosphere, so that the environment is more environment-friendly, and serious pollution to the environment is avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of hot strip rolling mills, in particular to a smoke exhaust device for hot strip rolling mills. Background Art

[0002] A hot strip mill refers to the equipment that performs the metal rolling process, generally encompassing the entire production process. During operation, hot strip mills typically generate high-temperature flue gas containing suspended droplets. This high-temperature flue gas is typically discharged directly into the atmosphere, causing severe environmental pollution. To prevent this environmental pollution, a fume exhaust device for hot strip mills is urgently needed to address this issue. Utility Model Content

[0003] In order to solve the technical problem that the high-temperature flue gas generated by the hot strip rolling mill during operation is directly discharged into the atmosphere, which will pollute the environment, the utility model provides a smoke exhaust device for the hot strip rolling mill, which can exchange heat with the high-temperature flue gas discharged from the hot rolling mill, so that the temperature of the high-temperature flue gas is reduced to obtain condensed flue gas, which effectively reduces the content of droplets in the high-temperature flue gas; the flue gas with reduced droplet content after condensation is discharged into the atmosphere, which is more environmentally friendly and will not cause serious pollution to the environment.

[0004] The utility model provides a smoke exhaust device for a hot strip rolling mill, comprising a flue, at least one set of heat exchange components and a smoke extraction component. The flue is provided with an air inlet and an air outlet. The heat exchange component includes a condenser arranged inside the flue and located between the air inlet and the air outlet. The smoke extraction component includes a fan and a smoke extraction structure. The air inlet of the fan is fixedly connected to the smoke outlet of the hot strip rolling mill, and the air outlet of the fan is fixedly connected to the air inlet of the flue through the smoke extraction structure. When the fan is started, high-temperature flue gas containing suspended micro-droplets discharged from the smoke outlet of the hot strip rolling mill passes through the air inlet and the smoke extraction structure and finally enters the flue. The condenser performs heat exchange on the high-temperature flue gas to reduce the temperature of the flue gas, thereby obtaining condensed flue gas. The amount of droplets contained in the condensed flue gas is reduced. The flue gas with reduced droplet content after condensation is finally discharged through the air outlet, without causing serious pollution to the environment.

[0005] Furthermore, the smoke extraction structure includes a bellows and an air duct. Mounting bases are provided at the bottoms of the fan and bellows. The fan's air outlet is fixedly connected to the bellows. The bellows is provided with a flexible joint that is fixedly connected to a valve. One end of the air duct is fixedly connected to the valve, and the other end of the air duct is fixedly connected to the air inlet of the flue. The air duct is arranged at an angle. When the fan is started and the valve is opened, high-temperature flue gas containing suspended micro-droplets discharged from the smoke outlet of the hot strip rolling mill enters the bellows through the air inlet. The high-temperature flue gas in the bellows then passes through the air duct and ultimately enters the flue.

[0006] Furthermore, two fans are provided and connected to each other, with the air inlet of one of the fans fixedly connected to the smoke outlet of the hot strip mill, the air outlet of one of the fans fixedly connected to the air inlet of the other fan, and the air outlet of the other fan fixedly connected to the wind box. This further increases the rate at which high-temperature flue gas enters the flue, thereby meeting the heat exchange requirements of subsequent heat exchange components for the high-temperature flue gas.

[0007] Furthermore, the two groups of smoke extractors are provided, and the two groups of smoke extractors are arranged on opposite sides of the flue. The two air inlets are provided, and the two air inlets are fixedly connected to the air outlets of the fans on the two groups of smoke extractors, respectively. The two groups of smoke extractors are provided, and the two smoke extractors operate synchronously, further increasing the rate at which high-temperature smoke enters the flue.

[0008] Furthermore, two fixed plates are disposed within the flue relative to each other, with a support beam fixedly connected between the two fixed plates. A grille mesh is fixedly connected to the support beam, and the condenser is fixedly connected to the grille mesh. The two water inlets of the condenser are fixedly connected to the heat exchange tubes. The flue is provided with two openings, and the ends of the two heat exchange tubes respectively pass through the two openings. The two water inlets of the condenser are fixedly connected to the heat exchange tubes, and the ends of the two heat exchange tubes respectively pass through the two openings and are then connected to the external cooling water tank. The cooling water in the condenser is recycled through the two water inlets and the heat exchange tubes, ensuring uninterrupted operation of the condenser.

[0009] Furthermore, a hood is installed at the top of the flue, positioned above the exhaust port. A sampling hole and multiple reinforcing ribs are located in the middle of the flue, with a plug fixedly connected to the sampling hole. Condensed flue gas is discharged through the flue's exhaust port, where the hood is installed to effectively prevent rainwater from entering the flue and affecting its normal operation.

[0010] Furthermore, an oil drain pipe and an inspection port are provided at the bottom of the flue, and the oil drain pipe and the inspection port are located below the air inlet. One end of the oil drain pipe is located inside the flue, and the other end of the oil drain pipe passes through to the outside of the flue and is fixedly connected to the oil collection pit.

[0011] Furthermore, a rotating ladder is provided outside the flue.

[0012] Compared with the prior art, the present invention has the following technical effects:

[0013] The smoke exhaust device of the present invention can exchange heat for the high-temperature flue gas discharged from the hot rolling mill, thereby reducing the temperature of the high-temperature flue gas to obtain condensed flue gas, effectively reducing the content of droplets in the high-temperature flue gas. The flue gas with reduced droplet content after condensation is discharged into the atmosphere, which is more environmentally friendly and will not cause serious pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a smoke exhaust device for a hot strip rolling mill of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view of the smoke exhaust device of the present invention;

[0016] Figure 3 This is a structural diagram of the finned condenser of the present utility model;

[0017] Figure 4 This is a structural diagram of the grid mesh plate of the utility model;

[0018] Figure 5 This is a schematic cross-sectional view of the hood of the utility model;

[0019] Figure 6 It is a structural schematic diagram of the rotary ladder of the utility model;

[0020] The reference numerals in the accompanying drawings are:

[0021] 1. Flue; 11. Plug; 12. Reinforcement rib; 13. Inspection port;

[0022] 2. Finned condenser;

[0023] 3. Smoking assembly; 31. Fan; 32. Bellows; 321. Flexible joint; 322. Valve; 33. Air duct; 34. Mounting base;

[0024] 4. Fixing piece;

[0025] 5. Support beam; 6. Grille mesh; 7. Air hood; 8. Oil drain pipe; 9. Rotating ladder. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 6 As shown, a smoke exhaust device for a hot strip rolling mill includes a flue 1, at least one group of heat exchange components and a smoking component 3. The flue 1 is arranged on the working ground and is provided with an air inlet and an air outlet. The flue 1 can be fixed to the working ground by nuts and bolts. The air inlet is located at the bottom of the flue 1, and the air outlet is located at the top of the flue 1. The heat exchange component includes a condenser 2 arranged inside the flue 1 and located between the air inlet and the air outlet. The condenser 2 adopts a fin-type condenser. The smoking component 3 includes a fan 31 and a smoking structure. The fan 31 is arranged on the working ground. The air inlet of the fan 31 is fixedly connected to the smoke outlet of the hot strip rolling mill, and the air outlet of the fan 31 is fixedly connected to the air inlet of the flue 1 through the smoking structure.

[0028] During the working process of the smoke exhaust device of this embodiment, the fan 31 is started, and the high-temperature flue gas containing suspended tiny droplets discharged from the smoke outlet on the strip hot rolling mill passes through the air inlet and the smoke extraction structure and finally enters the flue 1. The condenser 2 performs heat exchange on the high-temperature flue gas to reduce the temperature of the flue gas to obtain condensed flue gas. After condensation, the amount of droplets (the droplets in this embodiment can be oil droplets) contained in the flue gas with reduced droplet content is reduced, and finally the condensed flue gas is discharged through the exhaust port, and will not cause serious pollution to the environment.

[0029] The smoke exhaust device of this embodiment can perform heat exchange on the high-temperature flue gas discharged from the hot rolling mill, thereby reducing the temperature of the high-temperature flue gas to obtain condensed flue gas, effectively reducing the content of droplets in the high-temperature flue gas. The flue gas with reduced droplet content after condensation is discharged into the atmosphere, which is more environmentally friendly and will not cause serious pollution to the environment.

[0030] As an implementable embodiment, the smoking structure includes a bellows 32 and an air duct 33, a mounting base 34 is provided on the working ground and the bottoms of the fan 31 and the bellows 32 are both provided on the mounting base 34, the mounting base 34 can be fixed to the working ground by nuts and bolts, the fan 31 and the bellows 32 can be fixed to the mounting base 34 by nuts and bolts, the air outlet of the fan 31 is fixedly connected to the bellows 32, a flexible joint 321 is provided on the bellows 32 and the flexible joint 321 is fixedly connected to the valve 322, further, the valve 322 can adopt a fire damper, when the high-temperature flue gas temperature is too high and the bellows 32 catches fire, the fire damper can prevent the high-temperature flue gas from entering the flue 1 and further expand the fire, one end of the air duct 33 is fixedly connected to the valve 322, and the other end of the air duct 33 is fixedly connected to the air inlet of the flue 1, and the air duct 33 is arranged at an angle. The fan 31 is started and the valve 322 is opened. The high-temperature flue gas containing suspended tiny droplets discharged from the smoke outlet on the strip hot rolling mill enters the wind box 32 from the air inlet. The high-temperature flue gas in the wind box 32 passes through the air duct 33 and finally enters the inside of the flue 1.

[0031] As an embodiment, two fans 31 are provided and the two fans 31 are connected. Specifically, the air outlet of one fan 31 is fixedly connected to the air inlet of the other fan 31. The air inlet of one fan 31 is fixedly connected to the smoke outlet of the hot strip rolling mill, and the air outlet of the other fan 31 is fixedly connected to the wind box 32. The provision of two fans 31 further increases the rate at which high-temperature flue gas enters the flue 1, thereby meeting the heat exchange requirements of subsequent heat exchange components for the high-temperature flue gas.

[0032] In one embodiment, two groups of the smoke extractor assemblies 3 are provided. The two groups of the smoke extractor assemblies 3 are arranged on opposite sides of the outside of the flue 1. Two air inlets are provided, and the two air inlets are fixedly connected to the air outlets of the fans 31 on the two groups of smoke extractor assemblies 3. The two groups of smoke extractor assemblies 3 are provided, and the two smoke extractor assemblies 3 operate synchronously, further increasing the rate at which high-temperature smoke enters the flue 1.

[0033] As an implementation method, two fixing plates 4 are relatively arranged inside the flue 1, and a support beam 5 is fixedly connected between the two fixing plates 4. A grille mesh plate 6 is fixedly connected to the support beam 5, and the condenser 2 is fixedly connected to the grille mesh plate 6. The fixing plates 4 and the support beam 5, the support beam 5 and the grille mesh plate, and the condenser 2 and the grille mesh plate can be fixed by nuts and bolts. The two water inlets of the condenser 2 are fixedly connected to the heat exchange tubes. The flue 1 is provided with two openings, and the ends of the two heat exchange tubes pass through the two openings respectively. Furthermore, there are multiple fixing plates 4 and support beams 5, and multiple fixing plates 4 and support beams 5 are fixedly connected to the grille mesh plate 6 and support and fix the grille mesh plate 6. The grille mesh plate 6 fixes the condenser 2 inside the flue 1. The two water inlets of the condenser 2 are fixedly connected to the heat exchange tubes. The ends of the two heat exchange tubes pass through the two openings and are then connected to the external cooling water tank. The cooling water in the condenser 2 is circulated through the two water inlets and the heat exchange tubes to ensure that the condenser 2 works uninterruptedly.

[0034] As one possible implementation, a flared hood 7 is provided at the top of the flue 1, positioned above the exhaust port. The bottom of the hood 7 is fixedly connected to the top of the flue 1. The structure of the hood 7 is conventional and will not be further described here. Condensed flue gas is discharged through the exhaust port of the flue 1, where the hood 7 is installed. This effectively prevents rainwater from entering the flue 1 and affecting its normal operation.

[0035] As one possible implementation, a sampling hole and multiple reinforcing ribs 12 are provided in the middle of the flue 1. A plug 11 is fixedly connected to the sampling hole and snaps onto the plug 11. The reinforcement ribs 12 enhance the overall structural strength of the flue 1. By opening the plug 11, the sampling hole allows for regular sampling of the condensed flue gas to confirm whether it meets emission standards.

[0036] As one possible implementation, an oil drain pipe 8 is provided at the bottom of the flue 1 and is located below the air inlet. One end of the oil drain pipe 8 is located inside the flue 1, and the other end of the oil drain pipe 8 extends outside the flue 1 and is fixedly connected to an oil collection pit located on the work surface. The condenser 2 performs heat exchange on the high-temperature flue gas, lowering the flue gas temperature to produce condensed flue gas. Large droplets generated during the heat exchange process adhere to the inner wall of the flue 1 and drip to the bottom of the flue 1 due to gravity. These droplets enter the oil drain pipe 8 and then enter the oil collection pit through the oil drain pipe 8, where they are stored.

[0037] As an implementation method, an inspection port 13 is provided at the bottom of the flue 1 and is located below the air inlet. The inspection port 13 is provided to facilitate regular inspection or normal maintenance of the flue 1.

[0038] As an implementation method, a revolving ladder 9 is provided outside the flue 1. The revolving ladder 9 facilitates people to perform a series of operations on the flue 1, such as regular maintenance, regular gas extraction inspection, etc.

[0039] The embodiments described above are only preferred embodiments of the present invention and are only used to explain the present invention, not to limit the scope of implementation of the present invention. For those skilled in the art, it is of course possible to easily make other implementation methods by replacing or changing the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A smoke exhaust device for a hot strip rolling mill, characterized in that: The invention comprises a flue (1), at least one set of heat exchange components and a smoking component (3), wherein the flue (1) is provided with an air inlet and an air outlet, the heat exchange component comprises a condenser (2) arranged inside the flue (1) and located between the air inlet and the air outlet, and the smoking component (3) comprises a fan (31) and a smoking structure, wherein the air inlet of the fan (31) is fixedly connected to the smoke outlet of the strip hot rolling mill, and the air outlet of the fan (31) is fixedly connected to the air inlet of the flue (1) through the smoking structure.

2. The smoke exhaust device according to claim 1, characterized in that: The smoking structure comprises a bellows (32) and an air duct (33); a mounting seat (34) is provided at the bottom of the fan (31) and the bellows (32); an air outlet of the fan (31) is fixedly connected to the bellows (32); a flexible joint (321) is provided on the bellows (32), and the flexible joint (321) is fixedly connected to a valve (322); one end of the air duct (33) is fixedly connected to the valve (322); the other end of the air duct (33) is fixedly connected to the air inlet of the flue (1); and the air duct (33) is arranged in an inclined manner.

3. The smoke exhaust device according to claim 2, characterized in that: Two fans (31) are provided and the two fans (31) are connected, the air inlet of one of the fans (31) is fixedly connected to the smoke outlet of the strip hot rolling mill, the air outlet of one of the fans (31) is fixedly connected to the air inlet of the other fan (31), and the air outlet of the other fan (31) is fixedly connected to the wind box (32).

4. The smoke exhaust device according to claim 1, characterized in that: The smoking components (3) are provided in two groups, and the two groups of smoking components (3) are arranged on two sides of the outside of the flue (1) relative to each other. The two air inlets are provided, and the two air inlets are respectively fixedly connected to the air outlets of the fans (31) on the two groups of smoking components (3).

5. The smoke exhaust device according to claim 1, characterized in that: Two fixing plates (4) are arranged opposite to each other inside the flue (1), and a support beam (5) is fixedly connected between the two fixing plates (4). A grid mesh plate (6) is fixedly connected to the support beam (5), and the condenser (2) is fixedly connected to the grid mesh plate (6). Both water outlets of the condenser (2) are fixedly connected to the heat exchange tube. Two openings are provided on the flue (1), and the ends of the two heat exchange tubes respectively pass through the two openings.

6. The smoke exhaust device according to claim 1, characterized in that: A hood (7) is provided on the top of the flue (1), and the hood (7) is located above the exhaust port; a sampling hole and a plurality of reinforcing ribs (12) are provided in the middle of the flue (1), and a plug (11) is fixedly connected to the sampling hole.

7. The smoke exhaust device according to claim 1, characterized in that: An oil drain pipe (8) and an inspection port (13) are provided at the bottom of the flue (1), and the oil drain pipe (8) and the inspection port (13) are located below the air inlet. One end of the oil drain pipe (8) is located inside the flue (1), and the other end of the oil drain pipe (8) passes through the outside of the flue (1) and is fixedly connected to the oil collection pit.

8. The smoke exhaust device according to claim 1, characterized in that: A rotating ladder (9) is provided outside the flue (1).