A filter device for cleaning converter gas

Abstract

The application relates to the technical field of coal gas purification, in particular to a filtering device for converter gas purification, which comprises a dust collecting box, an elevated platform, a rotary coal pipe, a fixed branch pipe, an atomized water joint, a coarse filter assembly and a centrifugal fine filter assembly, the elevated platform is fixedly connected to the top of the dust collecting box, the rotary coal pipe is arranged above the elevated platform, and the atomized water joint is sleeved outside the fixed branch pipe. The filtering device for converter gas purification has the advantages that in the rotary process of the belt material frame pipeline in the coarse filter assembly, the slow flow baffle in the pipeline continuously guides the captured dust into the collecting box below. The conical cylinder screen of the fine filter part also continuously rotates, dust is thrown away from the screen surface under the action of centrifugal force, blockage is prevented, the continuous filtering capacity is maintained, continuous dust removal and online maintenance under the condition of no shutdown are realized, the whole filtering and dust removal process is automatically driven by a machine, and manual intervention is not needed.

Description

Technical Field

[0001] This application relates to the field of gas purification technology, and in particular to a filtration device for purifying converter gas. Background Technology

[0002] Converter gas is a high-calorific-value combustible gas produced by steel enterprises during the steelmaking process. However, it contains a large amount of dust (mainly iron oxide), is at high temperature, and has large fluctuations in composition. It must be efficiently purified before it can be recycled and reused. Otherwise, it is very easy to clog pipelines, damage equipment, and cause environmental pollution.

[0003] When converter gas enters the vaporization cooling flue through the movable fume hood, the large amount of high-temperature dust carried in the gas can easily cause blockage at the connection between the movable fume hood and the vaporization cooling flue. To alleviate this problem, filter plates are usually installed at the movable fume hood to reduce the amount of dust entering the vaporization cooling flue, thereby reducing pipe blockage. Generally, in order to ensure a stable connection between the filter plate and the movable fume hood, welding or multiple bolts are often used for fixing. However, this fixing method can easily cause inconvenience in disassembling the filter plate when it needs to be cleaned, thus affecting the progress of the cleaning work. Utility Model Content

[0004] This application provides a filter device for converter gas purification to improve the following technical problem: In general, in order to make the filter plate and the movable fume hood stable, welding or multiple bolts are often used for fixing. However, this fixing method is easy to cause inconvenience in disassembly when the filter plate needs to be cleaned, thus affecting the progress of the cleaning work.

[0005] This application provides a filtration device for purifying converter gas, employing the following technical solution: A filtration device for purifying converter gas includes an ash collection box, an elevated platform, a rotary coal feed pipe, a fixed branch pipe, an atomizing water connector, a coarse filter assembly, and a centrifugal fine filter assembly. The elevated platform is fixedly connected to the top of the ash collection box. The rotary coal feed pipe is positioned above the elevated platform. The fixed branch pipe is installed on the outside of the rotary coal feed pipe. The atomizing water connector is sleeved on the outside of the fixed branch pipe. The coarse filter assembly is installed in the middle of the rotary coal feed pipe. The centrifugal fine filter assembly is rotatably connected to the outside of the rotary coal feed pipe via a pipe.

[0006] The coarse filter assembly includes a first thrust bearing, a material frame pipe, a flow-slowing baffle, and a collection box. The first thrust bearing is rotatably connected to one side of the rotary coal pipe. The two sides of the material frame pipe are fixedly connected to the outer side of the shaft of the first thrust bearing. The flow-slowing baffle is welded inside the material frame pipe. The collection box is located below the material frame pipe and is used to collect heavy particulate dust that settles down by the mist sprayed from the atomizing water connector.

[0007] The centrifugal fine filtration assembly includes a bracket, a sealed tank, a power motor, a connecting shaft, a conical screen, and a flow guide. The bracket is fixedly connected to the top of the ash collection box, the sealed tank is fixedly connected to the inner side of the bracket, the output end of the power motor is fixedly connected to the top of the connecting shaft, the connecting shaft is rotatably connected to the top of the ash collection box, the conical screen is rotatably connected to the inside of the sealed tank, and the flow guide is fixedly connected to the inner side of the conical screen.

[0008] The outer side of the rotary coal pipe is also provided with a toothed sleeve, a DC motor, a positioning shaft and a transmission wheel. The toothed sleeve is sleeved on the outer side of the rotary coal pipe. The DC motor is installed on the top of the platform. The positioning shaft is fixedly connected to the outer side of the output end of the DC motor. The transmission wheel is sleeved on the outer side of the positioning shaft and meshes with the inner wall of the toothed groove of the toothed sleeve.

[0009] A second thrust bearing is also provided on the outer side of the connection between the rotary coal pipe and the fixed branch pipe to prevent rotation.

[0010] The bottom outer side of the sealed container is also provided with a direct connection pipe, a dust collection box and an electrostatic dust removal pipe. The two sides of the direct connection pipe are tightly attached to the surfaces of the sealed container and the dust collection box, respectively. The outer side of the output end of the dust collection box is connected to an external refrigerant pipe. The electrostatic dust removal pipe is installed inside the dust collection box and is used to adsorb small dust particles.

[0011] The bottom of the guide frame is connected to the connecting shaft via a transmission belt to form a belt drive structure, and the bottom of the guide frame penetrates the top inner wall of the ash collection box and is rotatably connected to the inner surface of the ash collection box.

[0012] In summary, this application includes at least one of the following beneficial technical effects: During the rotation of the material-carrying pipe in the coarse filtration assembly of this device, the internal slow-flow baffles continuously guide the captured dust into the collection box below. The collection box is easy to clean without disassembling the main filter components. The conical screen in the fine filtration section also rotates continuously, using centrifugal force to throw dust off the screen surface, preventing clogging and maintaining continuous filtration capacity. This allows for continuous dust removal and online maintenance without shutting down the machine, greatly reducing maintenance time and improving equipment uptime and production efficiency. Furthermore, the atomized water spray and slow-flow baffles primarily settle and capture large and heavy dust particles, completing the initial purification. The strong centrifugal force generated by the high-speed rotating conical screen effectively separates finer particles that are difficult to capture by the atomized water. This graded treatment mode is more targeted, and its filtration efficiency is far higher than that of a single filter plate. It not only reduces the total amount of dust entering the subsequent vaporization cooling flue, but more importantly, it reduces the particle size of the dust, greatly mitigating the risk of pipe blockage at the source. Through the cooperation of a DC motor, transmission wheel, and toothed sleeve, the rotary coal feed pipe is driven to rotate stably. The power motor drives the fine filter assembly through a connecting shaft and transmission belt, achieving fully automatic mechanical drive for the entire filtration and dust removal process, requiring no manual intervention. Furthermore, the device is equipped with a first thrust bearing and a second thrust bearing, effectively bearing the axial force generated by the rotating components, preventing component rotation or displacement, ensuring long-term stable operation of the entire system under harsh conditions of high temperature and high dust, and extending equipment life. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a filter device for purifying converter gas according to an embodiment of this application.

[0015] Figure 2 This is a top view of the top of the raised platform in an embodiment of this application.

[0016] Figure 3 This is a cross-sectional view of the pipe with a material frame in an embodiment of this application.

[0017] Figure 4 This is a schematic diagram of the centrifugal fine filtration component in an embodiment of this application.

[0018] Figure 5 This is a schematic diagram of the cone-shaped screen in the embodiments of this application.

[0019] Figure 6This is a distribution diagram of the electrostatic dust removal tubes in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Ash collection box; 2. Elevated platform; 3. Rotary coal feed pipe; 4. Fixed branch pipe; 5. Atomizing water connector; 6. Coarse filter assembly; 61. First thrust bearing; 62. Material frame pipe; 63. Flow damper; 64. Collection box; 7. Centrifugal fine filter assembly; 71. Bracket; 72. Sealed tank; 73. Power motor; 74. Connecting shaft; 75. Conical screen; 76. Flow guide; 8. Toothed sleeve; 9. DC motor; 10. Positioning shaft; 11. Transmission wheel; 12. Second thrust bearing; 13. Straight connecting pipe; 14. Dust collection box; 15. Electrostatic dust removal pipe. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] This application discloses a filtration device for purifying converter gas. (Refer to...) Figures 1 to 6 The filtration device for converter gas purification includes an ash collection box 1, an elevated platform 2, a rotary coal feed pipe 3, a fixed branch pipe 4, an atomizing water connector 5, a coarse filter assembly 6, and a centrifugal fine filter assembly 7. The elevated platform 2 is fixedly connected to the top of the ash collection box 1. The rotary coal feed pipe 3 is located above the elevated platform 2. The fixed branch pipe 4 is installed on the outside of the rotary coal feed pipe 3. The atomizing water connector 5 is sleeved on the outside of the fixed branch pipe 4. The coarse filter assembly 6 is installed in the middle of the rotary coal feed pipe 3. The centrifugal fine filter assembly 7 is rotatably connected to the outside of the rotary coal feed pipe 3 through a pipe.

[0027] The coarse filtration, fine filtration, drive, and ash collection functions are highly integrated into the frame of the ash collection box 1 and the raised platform 2. The structure is compact, occupies a small area, and is easy to install and arrange under the existing movable fume hood.

[0028] The coarse filter assembly 6 includes a first thrust bearing 61, a material frame pipe 62, a flow-slowing baffle 63, and a collection box 64. The first thrust bearing 61 is rotatably connected to one side of the rotary coal pipe 3. The two sides of the material frame pipe 62 are fixedly connected to the outer side of the shaft of the first thrust bearing 61. The flow-slowing baffle 63 is welded to the inside of the material frame pipe 62. The collection box 64 is located below the material frame pipe 62 and is used to collect heavy particulate dust that settles down from the mist sprayed by the atomizing water connector 5.

[0029] By using atomized water spray and slow-flow baffle 63, large and heavy dust particles are mainly settled and captured, thus completing the initial purification.

[0030] The centrifugal fine filtration assembly 7 includes a bracket 71, a sealed tank 72, a power motor 73, a connecting shaft 74, a conical screen 75, and a flow guide 76. The bracket 71 is fixedly connected to the top of the ash collection box 1, the sealed tank 72 is fixedly connected to the inside of the bracket 71, the output end of the power motor 73 is fixedly connected to the top of the connecting shaft 74, the connecting shaft 74 is rotatably connected to the top of the ash collection box 1, the conical screen 75 is rotatably connected to the inside of the sealed tank 72, and the flow guide 76 is fixedly connected to the inside of the conical screen 75.

[0031] The high-speed rotating conical screen 75 generates strong centrifugal force to effectively separate finer particles that are difficult to capture by atomized water.

[0032] The outer side of the rotary coal pipe 3 is also provided with a toothed sleeve 8, a DC motor 9, a positioning shaft 10 and a transmission wheel 11. The toothed sleeve 8 is sleeved on the outer side of the rotary coal pipe 3. The DC motor 9 is installed on the top of the platform 2. The positioning shaft 10 is fixedly connected to the outer side of the output end of the DC motor 9. The transmission wheel 11 is sleeved on the outer side of the positioning shaft 10 and meshes with the inner wall of the toothed groove of the toothed sleeve 8.

[0033] A second thrust bearing 12 is also provided on the outside of the connection between the rotary coal pipe 3 and the fixed branch pipe 4 to prevent rotation.

[0034] The bottom outer side of the sealed container 72 is also provided with a direct connection pipe 13, a dust collection box 14 and an electrostatic dust removal pipe 15. The two sides of the direct connection pipe 13 are tightly attached to the surfaces of the sealed container 72 and the dust collection box 14 respectively. The outer side of the output end of the dust collection box 14 is connected to an external refrigerant pipe. The electrostatic dust removal pipe 15 is installed inside the dust collection box 14 and is used to adsorb small dust particles.

[0035] The entire filtration and dust removal process is fully automated and mechanically driven, requiring no manual intervention. This not only frees operators from the heavy, high-temperature, and high-risk disassembly and cleaning work, reducing labor intensity and safety risks, but also reduces the possibility of equipment failure due to human error, thus lowering labor costs.

[0036] The bottom of the guide frame 76 is connected to the connecting shaft 74 via a transmission belt to form a belt drive structure, and the bottom of the guide frame 76 penetrates the top inner wall of the ash collection box 1 and is rotatably connected to the inner surface of the ash collection box 1.

[0037] The usage process of the filtration device for converter gas purification in this embodiment of the application is roughly as follows: High-temperature converter gas first enters the rotary coal feed pipe 3. Simultaneously, atomizing water connector 5, installed outside the fixed branch pipe 4, sprays atomized water. The water mist mixes with the high-temperature coal gas, cooling it and wetting and increasing the weight of some large dust particles. The mixed gas then enters the coarse filter assembly 6. The core of this assembly is the feed frame pipe 62, which rotates with the rotary coal feed pipe 3 under the support of the first thrust bearing 61. The flow-slowing baffle 63 welded inside the pipe reduces the gas flow rate and changes its direction, causing the heavy dust particles, increased in weight by the atomized water, to separate from the gas under inertia and settle into the collection box 64 below, completing the initial purification. The rotational power of the device is provided by a DC motor 9. After the motor starts, its output drives the positioning shaft 10 and the transmission wheel 11 to rotate. The transmission wheel 11 meshes with the toothed sleeve 8 fitted outside the rotary coal feed pipe 3, thereby transmitting power to the rotary coal feed pipe 3 and its connected coarse filter assembly 6, ensuring smooth rotation. The second thrust bearing 12 is used to prevent rotation at the connection between the fixed branch pipe 4 and the rotating coal feed pipe 3, ensuring effective power transmission. The coarsely filtered coal gas enters the centrifugal fine filter assembly 7 through a pipeline. This assembly is located inside a sealed tank 72 fixed by a bracket 71. The power motor 73 drives the connecting shaft 74 to rotate, which in turn drives the guide frame 76 and the conical screen 75 to rotate at high speed via a transmission belt. Under the guidance of the guide frame 76, the coal gas is evenly distributed. Fine dust particles are thrown against the screen wall by the strong centrifugal force generated by the high-speed rotating conical screen 75, thus achieving gas-solid separation. Clean coal gas passes through the screen. The gas discharged from the centrifugal fine filter assembly 7 can enter the dust collector 14 through the direct connection pipe 13. If extremely high purification requirements are needed, the electrostatic dust collector 15 inside the chamber can be activated to adsorb residual fine particles through a high-voltage electric field, achieving deep purification. Furthermore, the output end of the dust collector 14 can be connected to an external refrigerant pipeline to finally cool the purified coal gas before it is delivered to the user. Throughout the process, the separated dust eventually collects in the dust collection box 1 at the bottom for centralized processing.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A filtration device for purifying converter gas, characterized in that, The system includes an ash collection box (1), an elevated platform (2), a rotary coal feed pipe (3), a fixed branch pipe (4), an atomizing water connector (5), a coarse filter assembly (6), and a centrifugal fine filter assembly (7). The elevated platform (2) is fixedly connected to the top of the ash collection box (1). The rotary coal feed pipe (3) is located above the elevated platform (2). The fixed branch pipe (4) is installed on the outside of the rotary coal feed pipe (3). The atomizing water connector (5) is sleeved on the outside of the fixed branch pipe (4). The coarse filter assembly (6) is installed in the middle of the rotary coal feed pipe (3). The centrifugal fine filter assembly (7) is rotatably connected to the outside of the rotary coal feed pipe (3) through a pipe.

2. The filtration device for converter gas purification according to claim 1, characterized in that, The coarse filter assembly (6) includes a first thrust bearing (61), a material frame pipe (62), a slow-flow baffle (63), and a collection box (64). The first thrust bearing (61) is rotatably connected to one side of the rotary coal pipe (3). The two sides of the material frame pipe (62) are fixedly connected to the outer side of the shaft of the first thrust bearing (61). The slow-flow baffle (63) is welded inside the material frame pipe (62). The collection box (64) is located below the material frame pipe (62) and is used to collect heavy particulate dust that settles down by the mist sprayed by the atomizing water connector (5).

3. The filtration device for converter gas purification according to claim 1, characterized in that, The centrifugal fine filtration assembly (7) includes a bracket (71), a sealed tank (72), a power motor (73), a connecting shaft (74), a conical screen (75), and a flow guide (76). The bracket (71) is fixedly connected to the top of the ash collection box (1), the sealed tank (72) is fixedly connected to the inside of the bracket (71), the output end of the power motor (73) is fixedly connected to the top of the connecting shaft (74), the connecting shaft (74) is rotatably connected to the top of the ash collection box (1), the conical screen (75) is rotatably connected to the inside of the sealed tank (72), and the flow guide (76) is fixedly connected to the inside of the conical screen (75).

4. The filtration device for converter gas purification according to claim 1, characterized in that, The outer side of the rotary coal pipe (3) is also provided with a toothed sleeve (8), a DC motor (9), a positioning shaft (10) and a transmission wheel (11). The toothed sleeve (8) is sleeved on the outer side of the rotary coal pipe (3). The DC motor (9) is installed on the top of the platform (2). The positioning shaft (10) is fixedly connected to the outer side of the output end of the DC motor (9). The transmission wheel (11) is sleeved on the outer side of the positioning shaft (10) and meshes with the inner wall of the toothed groove of the toothed sleeve (8).

5. The filtration device for converter gas purification according to claim 1, characterized in that, A second thrust bearing (12) is also provided on the outside of the connection between the rotary coal pipe (3) and the fixed branch pipe (4) to prevent rotation.

6. The filtration device for converter gas purification according to claim 3, characterized in that, The bottom outer side of the sealed container (72) is also provided with a straight connecting pipe (13), a dust collection box (14) and an electrostatic dust removal pipe (15). The two sides of the straight connecting pipe (13) are tightly attached to the surfaces of the sealed container (72) and the dust collection box (14) respectively. The outer side of the output end of the dust collection box (14) is connected to an external refrigerant pipe. The electrostatic dust removal pipe (15) is installed inside the dust collection box (14) and is used to adsorb small dust particles.

7. The filtration device for converter gas purification according to claim 3, characterized in that, The bottom of the guide frame (76) is connected to the connecting shaft (74) via a transmission belt to form a belt drive structure, and the bottom of the guide frame (76) penetrates the top inner wall of the ash collection box (1) and is rotatably connected to the inner surface of the ash collection box (1).

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