Novel AOD (Argon Oxygen Decarburization) flue gas collecting cover device
Through the new AOD flue gas trap designed with a 35-degree angle, the existing device has solved the problems of complex structure and poor dust removal effect, and achieved the balance of efficient flue gas capture and production operations, improving the production efficiency and dust removal effect of steelmaking plants.
Patent Information
- Application Number
- CN202422296351.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing AOD smoke trapping device has problems such as complex structure, occupying operating space, and poor dust removal effect in secondary dust removal. In particular, the mobile trap cover affects production operations, and the traditional layout cannot take into account both dust removal effect and production requirements.
The new AOD flue gas trap cover with a plate frame structure, including a moving cover and a fixed cover, can move the cover body through the front and rear drive wheels and tracks in front and rear furnaces. Combined with a water-cooled flue designed at a 35-degree angle, it ensures that the flue gas is effectively captured and achieves full coverage and unobstructed state without affecting production operations.
It achieves simple structure and convenient production, ensuring the smooth operation of AOD steel and replacement furnace, and at the same time significantly improves the dust removal effect, increasing the operating space and smoke capture efficiency.
Smart Images
Figure CN223280878U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a smoke collecting device, in particular to a novel AOD smoke collecting hood device. Background Art
[0002] Stainless steel smelting typically utilizes an AOD furnace. AOD furnaces generate large amounts of dust during the smelting, charging, and tapping processes, necessitating dust removal equipment. AOD furnace dust removal methods can be categorized as primary, secondary, or tertiary capture. Primary capture is achieved through a water-cooled AOD fume hood. A water-cooled flue above the furnace mouth typically captures the high-temperature flue gases generated during the AOD smelting process. This water-cooled flue is located directly above the furnace mouth, providing excellent dust removal. Secondary capture is typically achieved through a capture hood, capturing the flue gases generated during the AOD mixing, charging, and tapping processes. Tertiary capture is achieved through a roof hood. This hood utilizes a large rooftop hood composed of a deflector hood and a top suction hood. This rooftop hood provides a high dust removal air volume but requires significant investment in the plant structure.
[0003] Existing AOD secondary dust collection hoods are divided into two types: fixed and mobile. The fixed collection hood is equipped with a dust collection hood around the AOD and a movable door in front of the furnace. This device can effectively capture the AOD flue gas, but it affects the AOD lifting operation and the AOD steel mixing operation. The use of this type of collection hood often requires offline replacement when the AOD furnace is replaced, that is, replacement from under the AOD furnace. In this case, a replacement trolley is required to complete the AOD furnace replacement. The mobile collection hood is a movable dust collection hood around the AOD. The collection hood is moved to the side when the AOD steel is mixed and replaced. When the AOD is processed, the collection hood is moved to the AOD workstation. The mobile collection hood can effectively capture the flue gas escaping from the AOD while ensuring the production operation requirements such as AOD steel mixing and AOD furnace replacement.
[0004] Mobile AOD secondary dust collection hoods are rarely used by steel mills at home and abroad, primarily because they already employ primary or tertiary dust collection and often no longer require secondary dust collection. However, with increasing environmental awareness, secondary dust removal is increasingly being adopted by steel mills. Currently, secondary dust collection hoods are designed to move forward and backward, with the moving track parallel to the AOD tapping direction. While this arrangement allows for secondary dust removal, it occupies the furnace access platform, restricting furnace access. Another secondary dust collection hood design uses a baffle mounted below the primary hood, but this hood has limited dust removal effectiveness and cannot achieve the desired secondary dust removal effect.
[0005] Therefore, the known AOD smoke capture method has the above-mentioned inconveniences and problems. Utility Model Content
[0006] The purpose of the utility model is to provide a safe and reliable new AOD smoke capture hood device.
[0007] To achieve the above objectives, the technical solution of the present invention is:
[0008] A new type of AOD smoke capture hood device, the main body of the device adopts a plate frame structure, characterized by:
[0009] The fume collecting hood is a plate frame structure, and is provided with a movable hood and a fixed hood, wherein the movable hood is provided with a furnace front driving wheel and a track and a furnace rear driving wheel and a track, a synchronous motor drives the movable hood to move on the track, and fixed hoods (2) are provided at both ends of the track, and the movable hood moves back and forth between the working position and the standby position, and a sealing measure is provided between the movable hood and the fixed hood, and a dust removal water cooling flue is provided on the top of the movable hood, and the water cooling flue moves together with the movable hood, and when in the working position, the other end of the water cooling flue leads to the AOD dust removal flue, and the movable hood station is provided with a working position and The movable cover is in the standby position. When the movable cover is opened to the working position on the movable cover track, the movable cover and the fixed cover cooperate to fully cover the AOD furnace mouth part and capture the flue gas generated by the AOD. When the movable cover is opened to the standby position, the AOD furnace mouth is unobstructed, and the operation of adding steel and replacing the AOD furnace can be realized. The movable cover is provided with driving wheels and corresponding tracks (4) in front of and behind the furnace. A primary dust removal water cooling flue (5) is provided on the top of the movable cover. One end of the water cooling flue is connected to the primary dust removal fixed end, and the other end leads to the flue gas capture unit.
[0010] The aforementioned novel AOD fume collection hood device, wherein the movable hood is provided with a furnace front driving wheel and a furnace rear side wall driving wheel.
[0011] The aforementioned new AOD fume collection hood device has a 35-degree angle between the top and the front side of the movable hood, which effectively guides the fume generated during temperature measurement to the water-cooled flue.
[0012] The aforementioned novel AOD fume collection hood device has a moving direction of the fume collection hood that is perpendicular to the AOD steel-out direction, and the tracks of the front-of-furnace moving hood and the rear-of-furnace moving hood are perpendicular to the AOD steel-out direction.
[0013] After adopting the above technical solution, the new AOD smoke capture hood device of the utility model has the following advantages:
[0014] 1. The capture hood device has a simple structure and is easy to manufacture;
[0015] 2. Ensure the production and operation requirements of AOD steel conversion and replacement of AOD furnace. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the use state of the new AOD smoke capture hood device according to an embodiment of the utility model;
[0017] Figure 2 This is a structural diagram of the movable cover and the fixed cover in the embodiment of the utility model in the working state of cooperation, so that the AOD furnace on the trolley is directly below the movable cover;
[0018] Figure 3 This is a schematic diagram of the connection structure between the movable hood and the primary dust removal water-cooling flue according to an embodiment of the present utility model. DETAILED DESCRIPTION
[0019] The present invention will be further described below with reference to the embodiments and the accompanying drawings. Example
[0020] Please refer to Figure 1-3 The main body of the new AOD fume collection hood of the present invention adopts a plate frame structure, including a movable hood 1, a fixed hood 2, a movable hood drive and track 3 in front of the furnace, a movable hood drive and track 4 behind the furnace and a primary dust removal water-cooled flue 5. The movable hood 1 is divided into a working position and a standby position. When the movable hood is opened to the working position, the movable hood and the fixed hood cover the AOD furnace, thereby effectively capturing the fume generated by the AOD. When the movable hood is opened to the standby position, the AOD furnace mouth is unobstructed, and the operations of adding steel and replacing the AOD furnace can be realized. The moving direction of the fume collection hood is perpendicular to the AOD steel-out direction, and the tracks in front of and behind the furnace are perpendicular to the AOD steel-out direction. In this way, the standby position of the collection hood can be stopped on the AOD tilting motor. Unlike the front and rear track collection hoods, this arrangement can increase the operating space in front of the furnace and facilitate temperature measurement and sampling for operators. The top and front of the moving hood are angled at 35 degrees, rather than at right angles. This design effectively directs the flue gases generated during temperature measurement to the water-cooling duct, increases the load capacity of the upper portion of the moving hood, and optimizes the overall weight of the AOD capture hood. There is no dust hood under the AOD furnace, facilitating tapping and slag dumping operations.
[0021] This utility model has substantial features and significant technological advancements. The new AOD fume collection hood device of the utility model has a significant dust removal effect. As a secondary dust removal device, it can effectively capture the smoke generated during the steel mixing, charging, and steel tapping processes of the AOD furnace. The leading angle of the movable hood furnace can more effectively guide the smoke to the water-cooled flue, while increasing the top load capacity, and arranging the water-cooled flue and top gun above the collection hood. AOD furnace changes are also more flexible. Only the movable part of the collection hood needs to be moved to the standby position to complete the AOD furnace change, replace the top gun, and other operations.
[0022] The new AOD fume capture hood device of the utility model is applied to the AOD engineering unit in the new base project of special metallurgical materials of Baowu Special Metallurgy. It is aimed at the steel plant's demand for AOD fume capture hoods. On the basis of ensuring normal furnace production operation, it solves the problem of poor dust removal effect of traditional AOD, and meets the requirements of normal AOD steel addition and AOD replacement.
[0023] The above embodiments are intended only to illustrate the present invention and are not intended to limit the present invention. Persons skilled in the art may make various modifications or variations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions are intended to fall within the scope of the present invention and are defined by the claims.
Claims
1. A new type of AOD smoke capture hood device, the main body of the device adopts a plate frame structure, characterized by: The fume collecting hood is a plate frame structure, and is provided with a movable hood and a fixed hood, wherein the movable hood is provided with a furnace front driving wheel and a track and a furnace rear driving wheel and a track, a synchronous motor drives the movable hood to move on the track, and fixed hoods (2) are provided at both ends of the track, and the movable hood moves back and forth between the working position and the standby position, and a sealing measure is provided between the movable hood and the fixed hood, and a dust removal water cooling flue is provided on the top of the movable hood, and the water cooling flue moves together with the movable hood, and when in the working position, the other end of the water cooling flue leads to the AOD dust removal flue, and the movable hood station is provided with a working position and The movable cover is in the standby position. When the movable cover is opened to the working position on the movable cover track, the movable cover and the fixed cover cooperate to fully cover the AOD furnace mouth part and capture the flue gas generated by the AOD. When the movable cover is opened to the standby position, the AOD furnace mouth is unobstructed, and the operation of adding steel and replacing the AOD furnace can be realized. The movable cover is provided with driving wheels and corresponding tracks (4) in front of and behind the furnace. A primary dust removal water cooling flue (5) is provided on the top of the movable cover. One end of the water cooling flue is connected to the primary dust removal fixed end, and the other end leads to the flue gas capture unit.
2. The novel AOD fume capture hood device according to claim 1, characterized in that: The movable cover is provided with a furnace front driving wheel and a furnace rear side wall driving wheel.
3. The novel AOD fume capture hood device according to claim 1, characterized in that: The top and front side of the movable cover are set at an angle of 35 degrees, which effectively guides the flue gas generated during temperature measurement to the water-cooled flue.
4. The novel AOD fume capture hood device according to claim 1, characterized in that: The moving direction of the fume collection hood is perpendicular to the AOD steel-out direction, and the tracks of the furnace front moving hood and the furnace rear moving hood are perpendicular to the AOD steel-out direction.