Bottom blowing air supply device of steelmaking converter

Abstract

The utility model discloses a steelmaking converter bottom blowing air supply device which comprises an air supply chamber, air inlet pipes and an air outlet hole and further comprises an inner cavity, a detachable filtering device is arranged in the air supply chamber and divides the inner cavity into an upper area and a lower area, and the air inlet pipes are arranged in the area below the inner cavity. A material receiving disc is arranged at the upper part of the air supply chamber, the material receiving disc is positioned right above the filtering device, and the air outlet hole vertically penetrates through an area above the material receiving disc; the bottom of the air supply chamber is connected with a pressurization assembly, the pressurization assembly comprises a horn-mouth-shaped pressurization pipeline and an air entraining pipe driven by a compressor, and the pressurization pipeline is connected with the air entraining pipe; a slidable baffle is arranged on the outer side of the air outlet hole and connected with the material receiving disc in a sliding mode. According to the utility model, the filtering device and the material receiving disc are arranged, and the filtering device and the material receiving disc can be quickly detached, so that the maintenance time is shortened; and a baffle is arranged for protection, so that the fire risk caused by cooling water leakage and impurities is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of steelmaking equipment, specifically relating to a bottom blowing gas supply device for a steelmaking converter. Background Technology

[0002] Traditional bottom-blown gas supply systems for steelmaking converters have the following problems: 1. Difficult installation and maintenance: Existing systems require cutting a hole with a diameter of approximately φ900mm in the converter shell to insert the gas supply pipe, resulting in reduced shell strength and difficulty in inspecting weld quality. Repairs require furnace shutdown, taking 3-4 days. 2. Safety hazards: The gas supply pipe and cooling water pipe coexist within the trunnion hole of the support ring. Long-term immersion can easily lead to pitting corrosion and leakage, potentially causing major safety accidents. 3. Impurity blockage and equipment damage: High-temperature impurities inside the furnace can easily fall into the gas supply port or filter screen, causing blockage or filter damage, requiring frequent cleaning and maintenance. 4. Insufficient gas supply pressure: Traditional pipeline design cannot effectively increase pressure, making it difficult for inert gas to penetrate the high-temperature molten pool, affecting the stirring effect. 5. Insufficient shutdown protection: When the air outlet is exposed, impurities may enter the gas supply components, damaging the equipment or causing a fire.

[0003] Chinese utility model patent CN 211645302 U discloses a bottom-blowing gas supply device for steelmaking converters, including a main body. A servo motor is fixedly installed on one side of the outer surface of the main body, and an air inlet is opened on one side of the inner surface of the main body. A centrifugal fan blade is fixedly installed at one end of the output shaft of the servo motor. A filter mechanism is connected to one side of the outer end of the main body, and a connecting seat is provided on one side of the outer end of the filter mechanism. A set of fixing blocks is fixedly installed on the outer surface of the filter mechanism near the connecting seat, and connecting rods are fixedly installed on the outer surface of the connecting seat corresponding to the fixing blocks. This solution has the problems of complex gas supply pipeline installation, easy clogging of the filter device, and insufficient gas supply pressure.

[0004] Therefore, this utility model provides a bottom blowing gas supply device for steelmaking converters to solve the problems mentioned in the background art. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of this utility model is to provide a bottom blowing gas supply device for steelmaking converter, which is used to deliver inert gas to the converter molten pool through the furnace bottom to achieve efficient stirring, and to solve the problems of complex gas supply pipeline installation, easy clogging of filter device, insufficient gas supply pressure and safety hazards in the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A bottom-blowing gas supply device for a steelmaking converter includes a gas supply chamber, an inlet pipe, and an outlet, as well as an inner cavity. The gas supply chamber is equipped with a detachable filter device, which divides the inner cavity into upper and lower regions. Multiple inlet pipes are arranged in the lower region of the inner cavity.

[0008] The upper part of the air supply chamber is provided with a receiving tray, which is located directly above the filter device, and the air outlet vertically penetrates the area above the receiving tray.

[0009] The bottom of the air supply chamber is connected to a pressurization assembly, which includes a flared pressurization pipe and a bleed pipe driven by a compressor. The pressurization pipe is connected to the bleed pipe.

[0010] A slidable baffle is provided on the outside of the air outlet, and the baffle is slidably connected to the receiving tray.

[0011] Further defining the filter device, the filter device includes a frame and a filter element, the filter element is disposed on the top of the filter device, the frame is provided with a first groove, the frame is horizontally inserted into the side wall of the air supply chamber through the first groove, and the edge of the frame is provided with a high-temperature resistant sealing layer.

[0012] Further, the receiving tray has a second groove on its surface, and the receiving tray is horizontally inserted into the side wall of the air supply chamber through the second groove. Anti-scalding handles are provided at both ends of the receiving tray.

[0013] Further specifying, the pressurization pipe is composed of multiple sections of irregularly shaped flared pipe connected in series, with the diameter of the top opening of the pressurization pipe being smaller than that of the bottom opening.

[0014] Further specifying, the intake pipe is equipped with a control valve and a seal, the control valve is connected to the flange of the seal, and the control valve and the seal are used to regulate the gas flow rate.

[0015] Furthermore, the inner wall of the pressurized pipe is coated with a heat-insulating coating.

[0016] The beneficial effects of this utility model are:

[0017] Modular design: By setting up a filter device and a receiving tray, and by making both the filter device and the receiving tray quick-disassembly, maintenance time is reduced;

[0018] Safety Enhancement: By installing baffles for protection, the risk of fire caused by cooling water leakage and impurities can be avoided;

[0019] Optimized gas supply efficiency: The pressurized pipeline uses a bell-shaped pipe, which greatly increases the pressure of the inert gas and improves the uniformity of the molten pool. Attached Figure Description

[0020] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0021] Figure 1 This is a cross-sectional view of an embodiment of a bottom-blowing gas supply device for a steelmaking converter according to the present invention;

[0022] Figure 2 This is a partial cross-sectional view of an embodiment of a bottom-blowing gas supply device for a steelmaking converter according to the present invention.

[0023] The symbols of the main components are explained as follows: 1. Air supply chamber; 2. Air inlet pipe; 3. Filter device; 4. Material receiving tray; 6. Air outlet; 7. Inner cavity; 8. Pressurized pipe; 9. Air vent pipe; 54. Baffle; 103. Frame; 104. Filter element; 105. Anti-scalding handle. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1As shown, the present invention provides a bottom blowing gas supply device for a steelmaking converter, including a gas supply chamber 1, an inlet pipe 2 and an outlet 6, and an inner cavity 7. The gas supply chamber 1 is provided with a detachable filter device 3, which divides the inner cavity 7 into upper and lower regions. Multiple inlet pipes 2 are arranged in the lower region of the inner cavity.

[0028] The upper part of the air supply chamber 1 is provided with a receiving tray 4, which is located directly above the filter device 3. The air outlet 6 vertically penetrates the area above the receiving tray 4.

[0029] The bottom of the air supply chamber 1 is connected to a pressurization assembly, which includes a flared pressurization pipe 8 and an air intake pipe 9 driven by a compressor. The pressurization pipe 8 is connected to the air intake pipe 9.

[0030] A slidable baffle 54 is provided on the outside of the air outlet 6, and the baffle 54 is slidably connected to the receiving tray 4.

[0031] In the practical application of this embodiment, the filter device 3 includes a frame 103 and a filter element 104. The filter element 104 is disposed on the top of the filter device 3. The frame 103 is provided with a first groove. The frame 103 is horizontally inserted into the side wall of the air supply chamber 1 through the first groove. The edge of the frame 103 is provided with a high-temperature resistant sealing layer.

[0032] In the practical application of this embodiment, the surface of the receiving tray 4 is provided with a second groove, and the receiving tray 4 is horizontally inserted into the side wall of the air supply chamber 1 through the second groove. Anti-scalding handles 105 are provided at both ends of the receiving tray 4.

[0033] In the practical application of this embodiment, the pressurization pipe 8 is composed of multiple irregularly shaped flared pipes connected in series, and the diameter of the top opening of the pressurization pipe 8 is smaller than that of the bottom opening.

[0034] In the practical application of this embodiment, the air intake pipe 2 is equipped with a control valve and a seal. The control valve is connected to the flange of the seal, and the control valve and the seal are used to regulate the gas flow rate.

[0035] In the practical application of this embodiment, the inner wall of the pressurized pipe 8 is coated with a heat-insulating coating.

[0036] Example 1:

[0037] In the treatment of high-temperature impurities, when smelting high-impurity molten iron in a steelmaking converter, slag falls into the groove of the receiving tray 4 through the vent 6. Workers clean the receiving tray and the filter device 3 by regularly pulling the anti-scalding handle 105 to avoid clogging the filter device 3.

[0038] Example 2:

[0039] In a high-pressure gas supply scenario, the compressor is started to generate inert gas. The inert gas enters the delivery pipeline through the gas inlet pipe 9, and is then pressurized through the bell-mouth pressurization pipe 8 before being delivered to the furnace bottom. At this time, the gas pressure is increased to 0.8MPa, which can effectively penetrate the molten pool.

[0040] Example 3:

[0041] When the machine stops, the operator pushes the baffle 54 to slide along the receiving tray 4 to cover the air outlet. The receiving tray 4 and the filter device 3 collect the fallen impurities.

[0042] Example 4: Modular Maintenance

[0043] The filter device 3 is removed and cleaned by disassembling the frame 103, and the filter element 104 is replaced, which takes about 20 minutes.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A bottom-blown gas supply device for a steelmaking converter, comprising a gas supply chamber (1), an inlet pipe (2), and an outlet (6), characterized in that: It also includes an inner cavity (7), and the air supply chamber (1) is provided with a detachable filter device (3). The filter device (3) divides the inner cavity (7) into upper and lower regions, and multiple air inlet pipes (2) are arranged in the lower region of the inner cavity. The upper part of the air supply chamber (1) is provided with a receiving tray (4), which is located directly above the filter device (3). The air outlet (6) penetrates vertically through the area above the receiving tray (4). The bottom of the air supply chamber (1) is connected to a pressurization assembly, which includes a flared pressurization pipe (8) and a siphon pipe (9) driven by a compressor. The pressurization pipe (8) is connected to the siphon pipe (9). The air outlet (6) is provided with a sliding baffle (54) on the outside, and the baffle (54) is slidably connected to the receiving tray (4).

2. The bottom-blowing gas supply device for a steelmaking converter according to claim 1, characterized in that: The filter device (3) includes a frame (103) and a filter element (104). The filter element (104) is located on the top of the filter device (3). The frame (103) has a first groove. The frame (103) is horizontally inserted into the side wall of the air supply chamber (1) through the first groove. The edge of the frame (103) is provided with a high-temperature resistant sealing layer.

3. The bottom-blowing gas supply device for a steelmaking converter according to claim 1, characterized in that: The receiving tray (4) has a second groove on its surface. The receiving tray (4) is horizontally inserted into the side wall of the air supply chamber (1) through the second groove. Anti-scalding handles (105) are provided at both ends of the receiving tray (4).

4. The bottom-blowing gas supply device for a steelmaking converter according to claim 1, characterized in that: The pressurized pipe (8) is composed of multiple irregularly shaped flared pipes connected in series, and the diameter of the top opening of the pressurized pipe (8) is smaller than that of the bottom opening.

5. The bottom-blowing gas supply device for a steelmaking converter according to claim 1, characterized in that: The air inlet pipe (2) is equipped with a control valve and a seal. The control valve is connected to the flange of the seal. The control valve and the seal are used to regulate the gas flow rate.

6. The bottom-blowing gas supply device for a steelmaking converter according to claim 4, characterized in that: The inner wall of the pressurized pipe (8) is coated with a heat-insulating coating.

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