Dust removal device for stokehole swing chute of melting furnace and melting furnace comprising dust removal device
By swinging the chute in front of the melting furnace, setting a dust collector and pipeline, combining the cover plate and control valve to form a negative pressure zone, the problems of smoke and resource waste in the production of the melting furnace are solved, and dust removal efficiency and environmental safety are improved.
Patent Information
- Application Number
- CN202420559408.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-03-21
AI Technical Summary
During the production process of the melting furnace, the height difference between the swing chute and the molten iron can or the torpedo tank truck causes the molten iron to boil, causing high-temperature dust-containing flue gas to overflow, seriously pollute the environment, and the traditional side air-absorbing and dust removal methods have problems of resource and energy waste.
Design a dust removal device for swinging chutes in front of a melting furnace, including a generally cylindrical dust removal cover and dust removal pipe at both ends of the swinging chute, connecting the dust removal pipe at the top, and an arc-shaped cover plate above the chute to prevent smoke and dust Spillover, control valves to control the opening and closing of the dust removal pipe, and combine the chimney effect to form a negative pressure zone to improve dust removal efficiency.
It significantly improves the dust collection effect of the dust collector, reduces smoke and dust spillage, reduces the entry of wild wind, reduces dust removal air volume and investment, simplifies maintenance, and improves the operating environment in front of the furnace.
Smart Images
Figure CN222336098U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dust removal in metallurgical industry, in particular to a dust removal device for a swing chute in front of a melting furnace and a melting furnace. Background Art
[0002] At present, the production process of liquid iron at home and abroad is mainly achieved through melting furnaces. Melting furnaces include blast furnaces and smelting reduction furnaces in non-blast furnace ironmaking. The liquid iron produced in the melting furnace production process is mostly achieved by switching the swing chute in front of the furnace to the corresponding downstream molten iron tank or torpedo tank car. When the melting furnace is tapping iron, due to the height difference between the swing chute and the molten iron tank or torpedo tank car, the strong impact can cause the molten iron in the molten iron tank or torpedo tank to boil, causing a large amount of high-temperature dusty flue gas to overflow into the atmosphere, seriously polluting the surrounding environment.
[0003] In order to solve the smoke problem when iron falls from the swing chute, the traditional method is to install dust removal facilities at the swing chute, generally using the side suction method, that is, adding a dust hood on the side of the swing chute. When iron is discharged, most of the smoke is sucked away through the side suction port. Although this method improves the working environment in front of the furnace to a certain extent, since the lower part of the swing chute is close to the iron ladle and cannot be closed, it is still an open operation, so a large amount of smoke and dust still overflows. At the same time, due to the open operation, a large amount of wild wind will enter the dust removal system, which will invisibly increase the dust removal amount and increase the air volume of the dust removal fan, resulting in a waste of resources and energy, which does not meet the requirements of energy conservation and emission reduction.
[0004] Therefore, an active and effective swing chute dust removal device is needed to solve the problem of smoke and dust overflow in front of the furnace and improve the operation and working environment of the furnace workers.
[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content
[0006] The utility model aims to provide a dust removal device for a swing chute in front of a melting furnace, which aims to solve the defects of a traditional dust removal system, enhance the dust removal capacity of smoke in front of the furnace, and improve the operating environment of workers in front of the furnace.
[0007] To achieve the above purpose, the utility model provides a dust removal device for a swing chute in front of a melting furnace. The dust removal device includes a dust removal hood and a dust removal pipeline; a dust removal hood is respectively provided at both ends of the swing chute, the dust removal hood is generally cylindrical, and a side wall opening is provided on the side wall of the dust removal hood, so that the two ends of the swing chute extend through the side wall opening of the dust removal hood respectively and are located in the dust removal hood, the bottom of the dust removal hood is open and directly faces the upper opening of the molten iron tank, so that the molten iron flowing out of the swing chute enters the molten iron tank, the top of the dust removal hood is connected to a dust removal pipeline, the pipeline opening of the dust removal pipeline is generally located directly above the end of the swing chute, and the dust removal pipeline is provided with a control valve, so that the dust removal pipeline can be opened or closed by the control valve to perform dust removal or stop dust removal.
[0008] Furthermore, the dust removal device also includes a cover plate connected between the dust removal hoods, and the cover plate is arranged above the area where the molten iron enters the swing chute to prevent the smoke and dust from overflowing and guide the smoke and dust into the dust removal hoods.
[0009] Furthermore, the cover plate is configured to be substantially arc-shaped so as to cover the entire swing chute.
[0010] Furthermore, the inner surface of the dust hood and the lower surface of the cover plate are coated with high temperature resistant material.
[0011] Further, the side wall opening is configured to be slightly larger than the swing space range of the end of the swing chute.
[0012] Further, the distance between the bottom of the dust removal hood and the top of the molten iron ladle is set to be less than 100 mm.
[0013] Furthermore, the connection between the dust removal hood and the dust removal duct is configured as a substantially truncated cone-shaped transition portion.
[0014] Further, the control valve is removable and disposed adjacent to the transition portion.
[0015] Further, the control valve is communicatively connected to a control center of the melting furnace so that the control valve is opened or closed in response to an instruction from the control center.
[0016] According to another aspect of the utility model, a melting furnace is provided, which comprises the above-mentioned dust removal device for the swing chute in front of the melting furnace.
[0017] The technical effect of the utility model is that the dust removal device for the swing chute in front of the melting furnace is arranged at the top of the swing chute where the smoke and dust are concentrated, so that a negative pressure area can be formed in the area above the swing chute, which greatly improves the dust collection effect of the dust removal cover, reduces the smoke and dust overflow, and greatly reduces the entry of wild wind. Compared with the prior art, the dust removal device and the melting furnace of the utility model have the following advantages:
[0018] 1) Under the same dust removal effect, the dust removal air volume of the equipment is reduced by at least 10%, and the corresponding investment is reduced by at least 15%.
[0019] 2) The device has high dust removal efficiency and effectively reduces the entry of wild wind.
[0020] 3) The device is easy to maintain and does not affect the maintenance of other equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 The dust removal device for the swing chute in front of a melting furnace according to one embodiment of the utility model is schematically shown.
[0022] Description of main reference numerals:
[0023] 1-dust removal duct; 2-control valve; 3-dust removal hood; 4-molten iron tank; 5-molten iron transport vehicle; 6-cover plate; 7-swing chute; 8-molten iron outlet; 9-side wall opening. DETAILED DESCRIPTION
[0024] The specific implementation modes of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.
[0025] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.
[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0027] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0028] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.
[0029] The melting furnace and dust removal device of the utility model are further described below in conjunction with the accompanying drawings and embodiments.
[0030] According to an embodiment, Figure 1 As shown, the melting furnace includes components such as a molten iron outlet 8, a swing chute 7, a molten iron tank 4 and a molten iron transport vehicle 5. Molten iron of the melting furnace flows out of the molten iron outlet 8 into the swing chute 7, and then enters the molten iron tank 4 through both ends of the swing chute 7. Preferably, the molten iron tank 4 is arranged on the molten iron transport vehicle 5 so as to transport the molten iron tank 4 filled with molten iron.
[0031] like Figure 1 As shown, the dust removal device for the swing chute 7 in front of the melting furnace includes a dust removal pipeline 1, a dust removal cover 3 and a cover plate 6. A dust removal cover 3 is respectively provided at both ends of the swing chute 7, and the dust removal cover 3 is generally cylindrical. A side wall opening 9 is provided on the side wall of the dust removal cover 3, so that the two ends of the swing chute 7 extend through the side wall opening 9 of the dust removal cover 3 and are located in the dust removal cover 3. The side wall opening 9 is set to be slightly larger than the swing space range of the end of the swing chute 7, so as to minimize the amount of wild wind while ensuring the stability of the dust removal cover 3 structure, thereby reducing the energy consumption of the fan. The bottom of the dust removal cover 3 is open and directly faces the upper opening of the molten iron tank 4, so that the molten iron flowing out of the swing chute 7 enters the molten iron tank 4. In order to reduce the amount of wild wind entering, preferably, the range of the distance between the bottom of the dust removal cover 3 and the top of the molten iron tank 4 is set to be less than 100 mm. The top of the dust removal cover 3 is connected to the dust removal pipeline 1, and the pipeline opening of the dust removal pipeline 1 is generally located directly above the end of the swing chute 7. The connection between the dust removal cover 3 and the dust removal pipeline 1 is set as a substantially truncated cone-shaped transition portion. Preferably, the dust removal pipeline 1 is provided with a control valve 2, so that the dust removal pipeline 1 can be opened or closed by controlling the valve 2 to perform dust removal or stop dust removal. Preferably, the control valve 2 is set adjacent to the transition portion.
[0032] Preferably, the dust removal device may further include a cover plate 6 connected between the dust hoods 3. Preferably, the cover plate 6 is arranged above the area where the molten iron enters the swing chute 7, so as to prevent the smoke and dust from overflowing and effectively guide the smoke and dust into the corresponding dust hood 3. Preferably, the cover plate 6 may be arranged to be generally arc-shaped so as to cover the entire swing chute 7.
[0033] Preferably, in order to ensure the service life of the dust hood 3 and the cover plate 6, the inner surface of the dust hood 3 and the lower surface of the cover plate 6 are coated with high temperature resistant material.
[0034] The working process of the dust removal device according to the utility model is as follows. When the melting furnace is working, the molten iron of the melting furnace enters the swing chute 7 from the molten iron outlet 8. Figure 1 As shown, when the swing chute 7 swings to the left tank position, the control valve 2 on the left dust removal pipeline 1 opens to perform dust removal work on the left side. When the swing chute 7 swings to the right tank position, the control valve 2 on the right dust removal pipeline 1 opens to perform dust removal work on the right side. Preferably, the control valve 2 is connected to the control center of the melting furnace in communication so that the control valve 2 opens or closes in response to the command of the control center.
[0035] The utility model is used for the dust removal device of the swing chute 7 in front of the melting furnace. It adopts the principle similar to the chimney effect. The gas will rise to form an airflow when heated. By setting a detachable dust cover 6 in the upper area where the molten iron flows into the swing chute 7, and setting a substantially fully enclosed dust cover 3 at both ends of the swing chute 7, so that the two dust covers 3 form an integral structure, thereby realizing a stable and reliable integral dust removal structure. In addition, the two ends of the swing chute 7 are accommodated in the dust cover 3, and holes are opened on the side walls of the dust cover 3 to leave a movement space for the swing chute 7 without affecting the swing of the swing chute 7, thereby forming a substantially closed space. Both dust covers 3 are provided with a detachable control valve 2, and the control valves 2 can be disassembled separately without affecting the maintenance of the swing chute 7. The height difference between the bottom of the dust cover 3 and the top of the molten iron tank 4 is controlled within 100 mm to meet the premise of forming a negative pressure in the dust cover 3 and reduce the entry of wild wind as much as possible. In order to protect the dust cover 3 and the cover plate 6, the inner surface of the dust cover 3 and the lower surface of the cover plate 6 are coated with high temperature resistant materials to achieve the purpose of heat insulation.
[0036] The utility model can greatly improve the dust collection effect of the dust hood 3 by optimizing the dust removal device of the swing chute 7 in front of the furnace, reduce the smoke and dust overflow and reduce the entry of wild wind. Compared with the traditional dust removal system in front of the furnace, it has a simple structure, is easy to implement, saves investment, and also greatly improves the operating environment in front of the furnace. The dust removal device of the utility model can also be used in the dust removal system in front of blast furnaces, Ouye furnaces, COREX furnaces, submerged arc furnaces and other melting furnaces.
[0037] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
[0038] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.
Claims
1. A dust removal device for a swing chute (7) in front of a melting furnace, characterized in that: The dust removal device comprises a dust removal cover (3) and a dust removal pipeline (1); A dust removal cover (3) is provided at each end of the swing chute (7). The dust removal cover (3) is cylindrical. A side wall opening (9) is provided on the side wall of the dust removal cover (3), so that the two ends of the swing chute (7) extend through the side wall opening (9) of the dust removal cover (3) and are located in the dust removal cover (3). The bottom of the dust removal cover (3) is open and faces the upper opening of the molten iron tank (4), so that the molten iron flowing out of the swing chute (7) enters the molten iron tank (4). The top of the dust removal cover (3) is connected to a dust removal pipe (1), and the pipe opening of the dust removal pipe (1) is located directly above the end of the swing chute (7). The dust removal pipeline (1) is provided with a control valve (2) so that the dust removal pipeline (1) can be opened or closed to start or stop dust removal.
2. The dust removal device according to claim 1, characterized in that: The dust removal device also includes a cover plate (6) connected between the dust removal covers (3). The cover plate (6) is arranged above the area where the molten iron enters the swing chute (7) so as to prevent the smoke and dust from overflowing and guide the smoke and dust into the dust removal covers (3).
3. The dust removal device according to claim 2, characterized in that: The cover plate (6) is arranged in an arc shape so as to cover the entire swing chute (7).
4. The dust removal device according to claim 1, characterized in that: The inner surface of the dust removal cover (3) and the lower surface of the cover plate (6) are both coated with high temperature resistant material.
5. The dust removal device according to claim 1, characterized in that: The side wall opening (9) is arranged to be larger than the swing space range of the end of the swing chute (7).
6. The dust removal device according to claim 1, characterized in that: The distance between the bottom of the dust removal hood (3) and the top of the molten iron ladle (4) is set to be less than 100 mm.
7. The dust removal device according to claim 1, characterized in that: The connection between the dust removal cover (3) and the dust removal pipe (1) is arranged as a truncated cone-shaped transition portion.
8. The dust removal device according to claim 7, characterized in that: The control valve (2) is removable and is arranged adjacent to the transition portion.
9. The dust removal device according to claim 1, characterized in that: The control valve (2) is connected to the control center of the melting furnace for communication, so that the control valve (2) is opened or closed in response to the command of the control center.
10. A melting furnace, characterized in that: The melting furnace comprises a dust removal device for a swing chute (7) in front of the melting furnace according to any one of claims 1 to 9.