A smoke capturing device for a converter oxygen lance

Abstract

The utility model discloses a kind of smoke dust trapping devices for converter oxygen lance, connect with oxygen lance, comprising: connecting plate, oxygen lance is penetrated in connecting plate;Connecting plate top is provided with smoke dust trapping cover, and the side of smoke dust trapping cover close to oxygen lance is provided with open mouth;Smoke dust trapping cover is provided with dust suction elbow pipe and dust suction straight pipe, and the input end of dust suction elbow pipe is located in open mouth and towards oxygen lance;Dust suction straight pipe one end is communicated with dust suction elbow pipe, and the other end is penetrated smoke dust trapping cover and is connected with external dust suction equipment.Utilize the device can effectively control the dispersion of smoke and harmful gas, reduce the smoke concentration of scene, not only can more clearly observe oxygen lance stick thick condition, reduce the possibility that steel slag falls to oxygen lance mouth when slag scraper handles oxygen lance stick slag, improve the sealing effect of nitrogen seal device;And also avoid smoke diffusion to cause environmental protection accident, reduce the difficulty of point inspection maintenance of equipment such as slag scraper simultaneously, satisfy the use demand of oxygen lance top blowing smelting molten steel.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas collection technology, specifically a flue gas collection device for converter oxygen lance. Background Technology

[0002] The oxygen lance is the "heart" and "engine" of converter steelmaking. It not only provides the core reactants but also serves as the primary energy source, driving the stirring of the molten pool, accelerating the reaction, and homogenizing the composition and temperature. It is also a key actuator for precisely controlling the smelting process. During the entire smelting process, most of the dust is absorbed by primary, secondary, and tertiary dust removal systems. A large amount of high-temperature, dust-laden flue gas is generated during the top-blown oxygen lance smelting of molten steel. Currently, this is mainly sealed using nitrogen sealing devices, which effectively prevent dust and open flames from escaping from the oxygen lance nozzle.

[0003] Chinese patent CN215328204U discloses a converter oxygen lance slag collection and dust removal device. This device is simple in structure, easy to use, and maintenance-free, fundamentally changing the current situation of manual slag cleaning, greatly reducing the labor intensity of workers, avoiding the pollution of the on-site environment by flue gas overflow during oxygen lance insertion, and eliminating the safety risk of CO leakage. However, a large amount of high-temperature dusty flue gas is generated during the oxygen lance top-blown steelmaking process, resulting in some dust still overflowing from the oxygen lance nozzle. After the oxygen lance smelt becomes coarse, a slag scraper is needed to clean the slag adhering to the oxygen lance. The overflowing dust makes it impossible for operators to see the coarseness of the oxygen lance, causing some slag to fall into the dust collection pipe suction port during slag scraping, causing blockage of the suction port. Moreover, the slag accumulation at the dust collection pipe suction port is difficult to clean, greatly affecting the dust collection effect and failing to meet the requirements of oxygen lance top-blown steelmaking.

[0004] Therefore, there is an urgent need for a dust collection device for converter oxygen lances to ensure effective control of the emission of dust and harmful gases, reduce the dust concentration on site, facilitate clear observation of the slag scraping situation of the oxygen lance by operators, and prevent dust diffusion from causing environmental accidents. Utility Model Content

[0005] The purpose of this invention is to provide a dust collection device for converter oxygen lances, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A dust collection device for a converter oxygen lance, connected to the oxygen lance, includes: A connecting plate through which the oxygen lance passes; The top of the connecting plate is provided with a dust collection hood, and the dust collection hood has an opening on the side near the oxygen lance. The dust collection hood is equipped with a dust suction bend and a dust suction straight pipe. The input end of the dust suction bend is located at the opening and faces the oxygen gun. One end of the straight suction pipe is connected to the curved suction pipe, and the other end passes through the dust collection hood and is connected to an external dust collection device.

[0007] The dust collection device for converter oxygen lance according to the present invention has at least the following technical effects: By connecting the converter oxygen lance to a dust collection device and installing a dust collection bend and a dust collection straight pipe inside the dust collection hood, with the input end of the dust collection bend facing the oxygen lance and one end of the dust collection straight pipe connected to the dust collection bend and the other end connected to external dust collection equipment, the device can effectively control the emission of dust and harmful gases during top-blown oxygen lance smelting of molten steel. This reduces the dust concentration on site, allows for clearer observation of slag adhesion on the oxygen lance, reduces the possibility of slag falling onto the oxygen lance nozzle when the slag scraper is handling slag adhesion on the oxygen lance, and allows the nitrogen sealing device to better seal the oxygen lance nozzle, improving the sealing effect of the nitrogen sealing device. Furthermore, it avoids environmental accidents caused by dust diffusion, significantly improves the phenomenon of dust overflow from the oxygen lance nozzle during oxygen lance smelting, and reduces the difficulty of inspection and maintenance of equipment such as the slag scraper, meeting the usage requirements of top-blown oxygen lance smelting of molten steel.

[0008] As a further embodiment of this utility model: the input end of the vacuum suction bend is flared, and the ratio of the diameter of the input end of the vacuum suction bend to the diameter of the vacuum suction bend is 1.2:1-1.5:1.

[0009] Because the inlet of the suction bend is flared, the ratio of the diameter of the inlet to the diameter of the suction bend is 1.2:1-1.5:1. This effectively increases the opening area of ​​the inlet, allowing it to cover a larger space and enabling smoke and dust to be smoothly drawn into the bend, reducing the possibility of smoke and dust escaping and greatly improving the device's ability to collect smoke and dust.

[0010] As a further improvement of this utility model, a guide plate is provided on the open side of the dust collection hood and near the dust suction bend.

[0011] As a further improvement of this utility model, the guide plate is adjustable and is hinged to the dust collection hood via a hinge.

[0012] As a further improvement of this utility model, the adjustment angle range of the guide plate is 30°-60°.

[0013] By installing a baffle plate on the open side of the dust collection hood and near the suction bend, the baffle plate is adjustable and hinged to the dust collection hood. The adjustment angle of the baffle plate is 30°-60°. This allows the baffle plate to adjust its angle according to the actual dust diffusion situation, changing the flow trajectory of the dust and guiding the dust more accurately to the input end of the suction bend. This reduces the disorderly flow and escape of dust in the dust collection hood, effectively improving dust collection efficiency and thus better controlling the emission of dust during oxygen lance smelting.

[0014] As a further improvement of this utility model, the inner wall of the vacuum suction bend and the inner wall of the vacuum suction straight pipe are respectively provided with a wear-resistant ceramic lining.

[0015] As a further improvement of this utility model, the thickness of the wear-resistant ceramic lining is 3mm-5mm.

[0016] During oxygen lance smelting, a large amount of high-temperature, dusty flue gas is drawn into the suction pipe. The dust particles in this flue gas possess a certain degree of hardness and sharpness. When these dust particles flow at high speed with the airflow, they generate strong friction and impact on the inner wall of the pipe. However, because the inner walls of both the suction bend and the straight suction pipe are lined with wear-resistant ceramic layers, with a thickness of 3mm-5mm, the suction bend and straight suction pipe can effectively resist the wear of dust particles, greatly reducing wear on the inner wall of the pipe. This allows the pipe to maintain a good condition for a longer period and extends the service life of both the suction bend and straight suction pipe.

[0017] As a further embodiment of this utility model: the length of the dust collection hood is 1900mm-2000mm, the width is 800mm-900mm, and the height is 1500mm-1600mm.

[0018] Because the length of the dust collection hood is 1900mm-2000mm, the width is 800mm-900mm, and the height is 1500mm-1600mm, the dust collection hood can provide a relatively large dust collection space for the oxygen lance. It can effectively cover the dust generated during the oxygen lance top-blown smelting of molten steel, reduce the possibility of dust escaping into the external environment, and thus improve the dust collection efficiency.

[0019] As a further embodiment of this utility model: the length of the suction bend is 600mm-700mm and the diameter is 500mm-560mm.

[0020] As a further embodiment of this utility model: the length of the suction tube is 950mm-1050mm and the diameter is 500mm-560mm.

[0021] Since the length of the suction bend is 600mm-700mm and the diameter is 500mm-560mm, while the length of the suction straight pipe is 950mm-1050mm and the diameter is 500mm-560mm, by setting appropriate lengths and diameters for the suction bend and straight pipe, the airflow resistance can be controlled within a reasonable range while meeting the system layout requirements. This provides sufficient flow space for the airflow, avoiding airflow blockage or increased resistance caused by excessively small pipe diameters. It ensures that the airflow passes smoothly and efficiently through the suction bend and straight pipe, reducing turbulence and improving the effectiveness and stability of smoke and dust collection. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a three-dimensional structural diagram of a dust collection device for an oxygen lance in a converter.

[0024] Figure label: 1. Oxygen lance; 2. Connecting plate; 3. Smoke and dust collection hood; 4. Opening; 5. Suction bend; 6. Suction straight pipe; 7. Deflector plate. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] like Figure 1 The present invention, as shown in this embodiment, provides a dust collection device for a converter oxygen lance, connected to the oxygen lance 1, comprising: a connecting plate 2 through which the oxygen lance 1 passes; a dust collection hood 3 is provided on the top of the connecting plate 2, and an opening 4 is provided on the side of the dust collection hood 3 near the oxygen lance 1; a suction bend 5 and a suction straight pipe 6 are provided inside the dust collection hood 3, the input end of the suction bend 5 being located at the opening 4 and facing the oxygen lance 1; one end of the suction straight pipe 6 is connected to the suction bend 5, and the other end passes through the dust collection hood 3 and is connected to an external dust collection device.

[0032] Specifically, by connecting the converter oxygen lance to oxygen lance 1 using a dust collection device, and installing a dust suction bend 5 and a dust suction straight pipe 6 inside the dust collection hood 3, the input end of the dust suction bend 5 is located at the opening 4 and faces the oxygen lance 1. One end of the dust suction straight pipe 6 is connected to the dust suction bend 5, and the other end is connected to an external dust collection device. This allows the device to effectively control the emission of dust and harmful gases during the top-blown smelting of molten steel using oxygen lance 1, reducing the dust concentration on site. It not only allows for clearer observation of the slag adhesion situation of oxygen lance 1, reducing the possibility of slag falling onto the oxygen lance nozzle when the slag scraper is handling the slag adhesion of oxygen lance 1, but also allows the nitrogen sealing device to better seal the oxygen lance nozzle, improving the sealing effect of the nitrogen sealing device. Furthermore, it avoids environmental accidents caused by dust diffusion, significantly improves the dust overflow phenomenon at the oxygen lance nozzle during oxygen lance 1 smelting, and reduces the difficulty of inspection and maintenance of equipment such as the slag scraper, meeting the usage requirements of top-blown smelting of molten steel using oxygen lance 1.

[0033] Furthermore, the inlet end of the suction bend 5 is funnel-shaped, and the ratio of the diameter of the inlet end of the suction bend 5 to the diameter of the suction bend 5 is 1.2:1-1.5:1.

[0034] Specifically, since the inlet of the suction bend 5 is funnel-shaped, the ratio of the diameter of the inlet of the suction bend 5 to the diameter of the suction bend 5 is 1.2:1-1.5:1. This can effectively increase the opening area of ​​the inlet of the suction bend 5, allowing the inlet of the suction bend 5 to cover a larger space, so that smoke and dust can be smoothly sucked into the suction bend 5, reducing the possibility of smoke and dust escaping, and greatly improving the device's ability to collect smoke and dust.

[0035] like Figure 1 As shown, a baffle plate 7 is provided on the side of the opening 4 of the dust collection hood 3 and near the dust suction bend 5. The baffle plate 7 is adjustable and is hinged to the dust collection hood 3 by a hinge. The adjustment angle range of the baffle plate 7 is 30°-60°.

[0036] Specifically, a guide plate 7 is installed on one side of the opening 4 of the dust collection hood 3 and near the dust suction bend 5. The guide plate 7 is adjustable and is hinged to the dust collection hood 3. The adjustment angle of the guide plate 7 is 30°-60°. This allows the guide plate 7 to adjust its angle according to the actual dust diffusion situation, changing the flow trajectory of the dust and guiding the dust more accurately to the input end of the dust suction bend 5. This reduces the possibility of disordered flow and escape of dust in the dust collection hood 3, effectively improves dust suction efficiency, and thus better controls the emission of dust during the smelting process of the oxygen lance 1.

[0037] Furthermore, the inner walls of the suction bend 5 and the suction straight pipe 6 are respectively provided with wear-resistant ceramic linings, and the thickness of the wear-resistant ceramic linings is 3mm-5mm.

[0038] Specifically, during the oxygen lance 1 smelting process, a large amount of high-temperature, dust-laden flue gas is drawn into the dust extraction pipe. The dust particles in this flue gas possess a certain degree of hardness and sharpness. When these dust particles flow at high speed with the airflow, they generate strong friction and impact on the inner wall of the pipe. However, because the inner walls of the dust extraction bend 5 and the dust extraction straight pipe 6 are respectively equipped with wear-resistant ceramic linings, and the thickness of these linings is 3mm-5mm, the dust extraction bend 5 and the dust extraction straight pipe 6 can effectively resist the wear of the dust particles, greatly reducing the wear on the inner wall of the pipe. This allows the pipe to maintain a good condition for a longer period and extends the service life of the dust extraction bend 5 and the dust extraction straight pipe 6.

[0039] According to an embodiment of the present invention, the length of the dust collection hood 3 is 1900mm-2000mm, the width is 800mm-900mm, and the height is 1500mm-1600mm.

[0040] Specifically, since the length of the dust collection hood 3 is 1900mm-2000mm, the width is 800mm-900mm, and the height is 1500mm-1600mm, the dust collection hood 3 can provide a relatively large dust collection space for the oxygen lance 1, effectively covering the dust generated during the top-blown smelting of molten steel by the oxygen lance 1, reducing the possibility of dust escaping into the external environment, thereby improving the dust collection efficiency.

[0041] Furthermore, the length of the vacuum suction bend 5 is 600mm-700mm and the diameter is 500mm-560mm; the length of the vacuum suction straight pipe 6 is 950mm-1050mm and the diameter is 500mm-560mm.

[0042] Specifically, the length of the suction bend 5 is 600mm-700mm and the diameter is 500mm-560mm, while the length of the suction straight pipe 6 is 950mm-1050mm and the diameter is 500mm-560mm. By setting appropriate lengths and diameters for the suction bend 5 and the suction straight pipe 6, the airflow resistance can be controlled within a reasonable range while meeting the system layout requirements. This provides sufficient flow space for the airflow, avoiding airflow blockage or increased resistance caused by excessively small pipe diameters. It ensures that the airflow passes smoothly and efficiently through the suction bend 5 and the suction straight pipe 6, reducing turbulence and improving the effectiveness and stability of dust collection.

[0043] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A dust collection device for a converter oxygen lance, connected to the oxygen lance (1), characterized in that, include: Connecting plate (2), through which the oxygen lance (1) passes; The top of the connecting plate (2) is provided with a dust collection hood (3), and the dust collection hood (3) is provided with an opening (4) on the side near the oxygen gun (1). The dust collection hood (3) is equipped with a dust suction bend (5) and a dust suction straight pipe (6). The input end of the dust suction bend (5) is located at the opening (4) and faces the oxygen gun (1). One end of the suction straight pipe (6) is connected to the suction curved pipe (5), and the other end passes through the smoke and dust collection hood (3) and is connected to the external suction equipment; A guide plate (7) is provided on the side of the opening (4) of the dust collection hood (3) and near the dust suction bend (5). The guide plate (7) is adjustable and is hinged to the dust collection hood (3) via a hinge. The adjustment angle range of the guide plate (7) is 30°-60°.

2. The dust collection device for converter oxygen lance according to claim 1, characterized in that, The input end of the suction bend (5) is flared, and the ratio of the diameter of the input end of the suction bend (5) to the diameter of the suction bend (5) is 1.2:1-1.5:

1.

3. The dust collection device for converter oxygen lance according to claim 1, characterized in that, The inner walls of the suction bend (5) and the suction straight pipe (6) are respectively provided with wear-resistant ceramic linings.

4. The dust collection device for converter oxygen lance according to claim 3, characterized in that, The thickness of the wear-resistant ceramic lining is 3mm-5mm.

5. The dust collection device for converter oxygen lance according to any one of claims 1 to 4, characterized in that, The length of the dust collection hood (3) is 1900mm-2000mm, the width is 800mm-900mm, and the height is 1500mm-1600mm.

6. The dust collection device for converter oxygen lance according to claim 5, characterized in that, The length of the suction bend (5) is 600mm-700mm and the diameter is 500mm-560mm.

7. The dust collection device for converter oxygen lance according to claim 6, characterized in that, The length of the suction pipe (6) is 950mm-1050mm and the diameter is 500mm-560mm.

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