Blast furnace casthouse dust removal device

Abstract

The utility model relates to a blast furnace forehearth iron tapping hole dust collector belongs to blast furnace ironmaking dust removal technical field, solves the technical problem that the main ditch of prior art's blast furnace forehearth is inconvenient to finish. The blast furnace forehearth iron tapping hole dust collector includes track, sets up in the both sides of main ditch under the working condition, dust cover can move and install on the track along the extension direction of track, locking piece is installed between dust cover and track, is used for fixing dust cover, exhaust fan is installed on dust cover, one end communicates with dust cover setup, is used for the smoke in dust cover and is extracted, filter assembly is installed at the top of dust cover, the other end of exhaust fan communicates with filter assembly and sets up, and filter assembly is used for filtering the smoke dust, exhaust pipe communicates with filter assembly and sets up, is used for filtering the smoke dust and discharges the iron field. Therefore the blast furnace forehearth iron tapping hole dust collector is convenient for the finishing of main ditch through the setting of movable dust cover and locking piece.

Description

Technical Field

[0001] This utility model belongs to the field of dust removal technology in blast furnace ironmaking, and specifically relates to a dust removal device at the tapping spout of a blast furnace. Background Technology

[0002] A blast furnace is constructed with a steel plate shell lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom: the throat, the body, the waist, the belly, and the hearth. Blast furnace ironmaking refers to the continuous production of liquid pig iron within a blast furnace using coke, rich iron ore lumps, sintered ore, pellets, and flux. Because this method is relatively simple, has high output, high labor productivity, and low energy consumption, blast furnace ironmaking remains the primary method of modern ironmaking.

[0003] The flue gas pollution during blast furnace production mainly originates from blast furnace gas and the tapping area corresponding to the tapping spout. Dust pollution in the tapping area primarily stems from the large amounts of dust generated during the opening and closing of the taphole and during tapping. The dust emission points are mainly located in the main channel, which is the section between the taphole and the skimmer. A skimmer is installed at the end of the main channel to separate the molten iron into slag and iron slag. The molten iron flows into the iron channel, while the slag flows into the slag channel for discharge. Furthermore, the large volume and high dust concentration (fine dust particles) of flue gas generated during blast furnace production result in severe pollution of the entire tapping area from dust, radiant heat, and harmful gases such as CO and SO2. Therefore, a dust removal device is installed in the main channel of the tapping area.

[0004] However, in the process of using a blast furnace, the dust removal devices at the main trough are mostly fixed in the existing technology. When it is necessary to repair the iron trough between the tapping hole and the slag skimmer, the fixed dust removal devices make it inconvenient for maintenance personnel to repair the main trough. Utility Model Content

[0005] This utility model provides a dust removal device for the tapping spout of a blast furnace, which solves the technical problem that the main trough in front of the blast furnace is inconvenient to repair in the prior art.

[0006] This utility model is achieved through the following technical solution: a dust removal device for the tapping spout of a blast furnace, comprising a track, a dust cover, a locking component, an exhaust fan, a filter assembly, and a flue pipe. The track is arranged on both sides of the main channel; the dust cover is slidably installed on the track along its extension direction; the locking component is installed between the dust cover and the track, and is used to fix the dust cover; the exhaust fan is installed on the dust cover, with one end connected to the dust cover, and is used to extract the flue gas inside the dust cover; the filter assembly is installed at the top of the dust cover, and the other end of the exhaust fan is connected to the filter assembly, and is used to filter the flue gas; the flue pipe is connected to the filter assembly, and is used to discharge the filtered flue gas from the tapping area.

[0007] Optionally, the filter assembly includes a water tank mounted on top of the dust cover, the water tank being used to contain coolant, and one end of the exhaust pipe being connected to the water tank.

[0008] Optionally, it also includes an exhaust fan, installed on the outer wall of the water tank, with one end connected to the water tank and extending into the water tank, and the other end connected to the dust cover.

[0009] Optionally, it also includes a dust hood, the inner diameter of which gradually decreases from one end to the other. The larger diameter end of the dust hood is installed on one side of the dust cover, and the smaller diameter end of the dust hood is connected to the other end of the exhaust fan. The side wall of the dust cover is provided with a plurality of ventilation holes, and the plurality of ventilation holes are provided at the larger diameter end of the dust cover.

[0010] Optionally, the track includes two guide rails, which are arranged on both sides of the main trench in the working state.

[0011] Optionally, it also includes multiple movable components, with the two guide rails being a first guide rail and a second guide rail, and the multiple movable components being respectively installed between the first guide rail and the dust cover and between the second guide rail and the dust cover.

[0012] Optionally, the movable component includes a mounting plate, a rotating shaft, and rollers. One end of the mounting plate is fixedly mounted on the outer wall of the dust cover and spaced apart from the dust cover. A mounting groove is provided on the side of the mounting plate near the dust cover. One end of the rotating shaft is rotatably mounted in the mounting groove, and the other end of the rotating shaft is spaced apart from the dust cover. The rollers are fixedly connected to the rotating shaft and are mounted on the guide rail.

[0013] Optionally, the roller is a V-shaped wheel, and both guide rails are V-shaped guide rails adapted to the V-shaped wheel.

[0014] Optionally, it also includes a ball bearing, installed in the mounting groove, with one end of the rotating shaft inserted into the ball bearing.

[0015] Optionally, the locking component includes a rotating rod and a ring plate. One end of the rotating rod is provided with an external thread. The side wall of the mounting plate is provided with a threaded hole adapted to the external thread and communicates with the mounting groove. One end of the rotating shaft is provided with a insertion groove adapted to the rotating rod, and the other end of the rotating rod is rotatably inserted into the threaded hole and the insertion groove. The ring plate is fixedly sleeved on the outer side wall of the rotating shaft, and the inner side wall of the mounting groove is provided with an annular groove adapted to the ring plate. The ring plate is rotatably inserted into the annular groove.

[0016] Optionally, it also includes a temperature sensor installed inside the water tank, the temperature sensor being used to detect the temperature of the coolant inside the water tank.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] This utility model provides a dust removal device for the tapping spout of a blast furnace, comprising a track, a dust cover, a locking component, an exhaust fan, a filter assembly, and an exhaust pipe. In operation, the track is positioned on both sides of the main channel. The dust cover is movable along the track's extension direction and installed on the track. The locking component is installed between the dust cover and the track to secure the dust cover. The exhaust fan is installed on the dust cover, with one end connected to the dust cover, and is used to extract the flue gas from inside the dust cover. The filter assembly is installed at the top of the dust cover, with the other end of the exhaust fan connected to the filter assembly, and is used to filter the flue gas. The exhaust pipe is connected to the filter assembly and is used to discharge the filtered flue gas from the tapping area.

[0019] With the above structure, when using the dust removal device for the blast furnace tapping outlet provided by this utility model, the track is first laid in the tapping area in front of the blast furnace and located on both sides of the main trough. Then, the dust cover is installed on the track and positioned at the tapping outlet. Then, it is fixed to the track by locking components. When the blast furnace starts tapping iron, after the molten iron flows into the main trough from the tapping outlet, the flue gas is covered inside the dust cover. Then, the exhaust fan is driven to extract the flue gas from the dust cover and discharge it into the filter assembly. The flue gas is filtered by the filter assembly and finally discharged from the tapping area through the exhaust pipe, thereby reducing flue gas pollution. When the main channel needs to be repaired, simply open the locking device and push the dust cover away from the tap hole along the extension direction of the track. The track reduces the deviation of the dust cover during movement. Therefore, the movable dust cover and locking device make the dust removal device at the tap hole of the blast furnace provided in this embodiment easier to move and fix, and thus easier to repair the main channel. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the dust removal device at the tapping spout of the blast furnace provided in this embodiment of the utility model;

[0022] Figure 2This is a cross-sectional view of the dust removal device at the tapping spout of the blast furnace provided in this embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle.

[0024] In the picture:

[0025] 1-Main trench; 2-Railway; 21-First guide rail; 22-Second guide rail; 3-Dust cover; 31-Ventilation hole; 4-Locking component; 41-Rotating rod; 411-External thread; 42-Ring plate; 5-Exhaust fan; 6-Water tank; 7-Smoke exhaust pipe; 8-Dust suction cover; 9-Moving component; 91-Mounting plate; 911-Mounting groove; 912-Threaded hole; 913-Annular groove; 92-Rotating shaft; 921-Interlocking groove; 93-Roller; 10-Ball bearing; 20-Temperature sensor. Detailed Implementation

[0026] In the description of this application, it should be understood that the terms "center", "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.

[0027] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] This utility model provides a dust removal device for the taphole of a blast furnace, which solves the technical problem of the main trough in front of the blast furnace being difficult to repair in the prior art. The dust removal device includes a track 2, a dust cover 3, a locking component 4, an exhaust fan 5, a filter assembly, and a flue pipe 7, wherein:

[0031] When in operation, the track 2 is set on both sides of the main trench 1, and the extension direction of the track 2 is consistent with the extension direction of the main trench 1.

[0032] The dust cover 3 is slidably installed on the track 2 along the extension direction of the track 2. Optionally, the dust cover 3 is a hollow cuboid with an opening at the bottom, and the opening is set opposite to the main ditch 1. The main ditch 1 and the dust cover 3 are connected through the opening. In this way, when molten iron is discharged from the tap hole, the flue gas generated is covered inside the dust cover 3, reducing the overflow of flue gas at the tap hole and thus reducing the pollution of the environment in the tapping area. The movable dust cover 3 makes it easier to move. When the main ditch 1 needs to be repaired, the dust cover 3 can be moved out from above the main ditch 1, avoiding the dust cover 3 from obstructing the maintenance personnel from repairing the main ditch 1. At the same time, the track 2 guides the movement of the dust cover 3, reducing the deviation of the dust cover 3 during the movement and thus reducing the possibility of the dust cover 3 falling into the main ditch 1.

[0033] The locking element 4 is installed between the dust cover 3 and the track 2. The locking element 4 is used to fix the dust cover 3. In this way, when it is necessary to fix the dust cover 3, the dust cover 3 is fixed on the track 2 by the locking element 4, which prevents the dust cover 3 from moving during use and causing a large amount of smoke to overflow. Therefore, the setting of the locking element 4 makes it easier to fix the dust cover 3.

[0034] The exhaust fan 5 is installed on the dust cover 3, and one end of the exhaust fan 5 is connected to the dust cover 3. The exhaust fan 5 is used to extract the smoke from the dust cover 3. Optionally, the air inlet of the exhaust fan 5 is connected through a flexible hose. In this way, the exhaust fan 5 makes it easier to extract the smoke from the dust cover 3, and at the same time, further reduces the smoke overflow.

[0035] The filter assembly is installed on the top of the dust cover 3, and the other end of the exhaust fan 5 is connected to the filter assembly, that is, the air outlet of the exhaust fan 5 is connected to the filter assembly. The filter assembly is used to filter smoke and dust, and the filter assembly facilitates the filtration of flue gas.

[0036] The exhaust pipe 7 is connected to the filter assembly. The exhaust pipe 7 is used to discharge the filtered smoke and dust from the ironmaking area. In this way, by setting up the exhaust pipe 7, the filtered smoke and dust are discharged from the ironmaking area, reducing the environmental pollution in the ironmaking area.

[0037] With the above structure, when using the dust removal device for the blast furnace tapping outlet provided by this utility model, the track 2 is first laid in the tapping area in front of the blast furnace and located on both sides of the main trough 1. Then, the dust cover 3 is installed on the track 2 and positioned at the tapping outlet. Then, it is fixed to the track 2 by the locking member 4. When the blast furnace starts tapping iron, the molten iron flows into the main trough 1 from the tapping outlet. The flue gas is covered in the dust cover 3. Then, the exhaust fan 5 is driven to extract the flue gas from the dust cover 3 and discharge it into the filter assembly. The flue gas is filtered by the filter assembly and finally discharged from the tapping area through the exhaust pipe 7, thereby reducing the pollution of the environment by the flue gas. When the main channel 1 needs to be repaired, simply open the locking part 4 and then push the dust cover 3 away from the tap hole along the extension direction of the track 2. The track 2 reduces the displacement of the dust cover 3 during movement. Therefore, the movable dust cover 3 and the locking part 4 make the dust removal device at the tap hole of the blast furnace front provided by this utility model embodiment easier to move and fix, and thus easier to repair the main channel 1.

[0038] An optional implementation of this embodiment is as follows: The filter assembly includes a water tank 6, which is installed on top of the dust cover 3. The water tank 6 is used to contain coolant. One end of the exhaust pipe 7 is connected to the water tank 6. Specifically, the air outlet of the exhaust fan 5 is connected to the water tank 6 through a pipe. That is, one end of the pipe is connected to the air outlet of the exhaust fan 5, and the other end extends into the water tank 6 and is submerged in the coolant. This facilitates the cleaning of the flue gas to remove particulate matter and harmful gases, such as sulfur dioxide, from the flue gas. One end of the exhaust pipe 7 is installed on top of the water tank 6 to prevent water in the water tank 6 from overflowing into the exhaust pipe 7. In this way, the cooling setting can not only reduce the temperature of the flue gas, but also reduce the temperature of the dust cover 3 connected to the water tank 6, thereby extending the service life of the dust cover 3.

[0039] An optional implementation of this embodiment is as follows: It also includes a dust collection hood 8, the inner diameter of which gradually decreases from one end to the other. The large diameter end of the dust collection hood 8 is installed on one side of the dust cover 3, and the small diameter end of the dust collection hood 8 is connected to the other end of the exhaust fan 5. Optionally, the dust collection hood 8 is frustum-shaped. The side wall of the dust cover 3 is provided with a plurality of ventilation holes 31, which are located within the projection of the large diameter end of the dust cover 3 in the first direction. In this way, the dust cover 3 and the dust collection hood 8 are connected by the plurality of ventilation holes 31, which facilitates the exhaust fan 5 to suck out the smoke inside the dust cover 3. With the frustum-shaped dust collection hood 8, the large diameter end of the dust collection hood 8 can effectively capture more smoke, while the small diameter end of the dust collection hood 8 can better concentrate the smoke, thereby improving the suction power and effect.

[0040] An optional implementation of this embodiment is as follows: The track 2 includes two guide rails, which are arranged on both sides of the main trench 1 in the working state. In this way, the stability of the overall structure can be improved by setting up two guide rails.

[0041] An optional implementation of this embodiment is as follows: It further includes multiple movable components 9. The two guide rails are a first guide rail 21 and a second guide rail 22. Multiple movable components 9 are respectively installed between the first guide rail 21 and the dust cover 3, and between the second guide rail 22 and the dust cover 3. Thus, the movable components 9 facilitate the movement of the dust cover 3 on the guide rails. Optionally, the movable component 9 includes a mounting plate 91, a rotating shaft 92, and rollers 93, wherein:

[0042] One end of the mounting plate 91 is fixedly installed on the outer side wall of the dust cover 3 and spaced apart from the dust cover 3. Optionally, a first plate is also included, with one end of the mounting plate 91 fixedly installed on one end of the first plate and arranged perpendicularly to each other. One end of the first plate is fixedly installed on the outer side wall of the dust cover 3. A mounting groove 911 is provided on the side of the mounting plate 91 near the dust cover 3. One end of the rotating shaft 92 is rotatably installed in the mounting groove 911, and the other end of the rotating shaft 92 is spaced apart from the dust cover 3. Optionally, a ball bearing 10 is also included, installed in the mounting groove 911, and one end of the rotating shaft 92 is inserted into the ball bearing 10. The ball bearing 10 reduces friction between the rotating shaft 92 and the mounting groove 911, making it easier to drive the rotating shaft 92 to rotate within the mounting groove 911, thus facilitating the rotation of the roller 93. The roller 93 is fixedly connected to the rotating shaft 92 and mounted on the guide rail, making it easier to drive the dust cover 3 to move on the track 2. The roller 93 is a V-shaped wheel, and both guide rails are V-shaped guide rails adapted to the V-shaped wheel. This cooperation between the V-shaped wheel and the V-shaped guide rails reduces the possibility of the roller 93 derailing during rotation.

[0043] An optional implementation of this embodiment is as follows: The locking member 4 includes a rotating rod 41 and a ring plate 42, wherein:

[0044] One end of the rotating rod 41 is provided with an external thread 411. The side wall of the mounting plate 91 is provided with a threaded hole 912 that is adapted to the external thread 411 and is connected to the mounting groove 911. One end of the rotating shaft 92 is provided with a insertion groove 921 that is adapted to the rotating rod 41. The other end of the rotating rod 41 is rotatably inserted into the threaded hole 912 and the insertion groove 921. Optionally, the rotating rod 41 includes a screw and a round rod. One end of the screw is fixedly installed on one end of the round rod, and the other end of the round rod is rotatably inserted into the threaded hole 912 and the through hole.

[0045] The annular plate 42 is fixedly sleeved on the outer wall of the rotating shaft 92. The inner wall of the mounting groove 911 has an annular groove 913 that matches the annular plate 42. The annular plate 42 is rotatably inserted into the annular groove 913. This arrangement of the annular plate 42 prevents the rotating shaft 92 from falling out of the ball bearing 10. When it is necessary to fix the roller 93, push the rotating rod 41 towards the dust cover 3 until the connection between the screw and the round rod is connected to the mounting plate 91. Then, rotate the rotating rod... The rod 41 is used to screw the screw into the threaded hole 912 until the other end of the rod 41 abuts against the inner bottom wall of the insertion groove 921, stopping the rotation. In this way, the rotating shaft 92 is fixed by the friction between the rod 41 and the inner bottom wall of the insertion groove 921, thereby fixing the roller 93. When the roller 93 needs to rotate, simply rotate the rod 41 in the opposite direction to separate the other end of the rod 41 from the inner bottom wall of the insertion groove 921 until the screw is completely screwed out of the threaded hole 912.

[0046] An optional implementation of this embodiment is as follows: It also includes a temperature sensor 20, which is installed in the water tank 6. The temperature sensor 20 is used to detect the temperature of the coolant in the water tank 6. In this way, by setting the temperature sensor 20, when the temperature of the coolant in the water tank 6 rises to the set temperature, the staff will be reminded to replace the coolant.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A dust removal device for the taphole of a blast furnace, characterized in that, include: Tracks are installed on both sides of the main ditch; A dust cover is slidably installed on the track along the extension direction of the track; A locking element is installed between the dust cover and the track, and the locking element is used to fix the dust cover. An exhaust fan is installed on the dust cover, with one end connected to the dust cover. The exhaust fan is used to extract the smoke from inside the dust cover. A filter assembly is installed on the top of the dust cover, and the other end of the exhaust fan is connected to the filter assembly. The filter assembly is used to filter smoke and dust. The exhaust pipe is connected to the filter assembly and is used to discharge the filtered smoke and dust out of the ironworks.

2. The dust removal device at the taphole of a blast furnace according to claim 1, characterized in that, The filter assembly includes a water tank, which is installed on top of the dust cover. The water tank is used to contain coolant, and one end of the exhaust pipe is connected to the water tank.

3. The dust removal device at the taphole of a blast furnace according to claim 1, characterized in that, It also includes a dust hood, the inner diameter of which gradually decreases from one end to the other. The larger diameter end of the dust hood is installed on one side of the dust cover, and the smaller diameter end of the dust hood is connected to the other end of the exhaust fan. The dust cover has multiple ventilation holes on its side wall, and the multiple ventilation holes are located at the large diameter end of the dust cover.

4. The dust removal device at the taphole of a blast furnace according to claim 1, characterized in that, The track includes two guide rails, which are positioned on both sides of the main trench in the working state.

5. A dust removal device for the taphole of a blast furnace according to claim 4, characterized in that, It also includes multiple moving components, with the two guide rails being a first guide rail and a second guide rail, and the multiple moving components being respectively installed between the first guide rail and the dust cover and between the second guide rail and the dust cover.

6. A dust removal device for the taphole of a blast furnace according to claim 5, characterized in that, The moving component includes: The mounting plate is fixedly installed at one end on the outer wall of the dust cover and is spaced apart from the dust cover. The rotating shaft has a mounting groove on the side of the mounting plate near the dust cover. One end of the rotating shaft is rotatably installed in the mounting groove, and the other end of the rotating shaft is spaced apart from the dust cover. The roller is fixedly connected to the rotating shaft and is mounted on the guide rail.

7. A dust removal device for the taphole of a blast furnace according to claim 6, characterized in that, The roller is a V-shaped roller, and both guide rails are V-shaped guide rails adapted to the V-shaped roller.

8. A dust removal device for the taphole of a blast furnace according to claim 6, characterized in that, It also includes a ball bearing, which is installed in the mounting groove, and one end of the rotating shaft is inserted into the ball bearing.

9. A dust removal device for the taphole of a blast furnace according to claim 6, characterized in that, The locking element includes: The rotating rod has an external thread at one end. The side wall of the mounting plate has a threaded hole that matches the external thread and is connected to the mounting groove. One end of the rotating shaft has a plug groove that matches the rotating rod, and the other end of the rotating rod is rotatably inserted into the threaded hole and the plug groove. A ring plate is sleeved on the outer side wall of the rotating shaft, and an annular groove adapted to the ring plate is provided on the inner side wall of the mounting groove. The ring plate is rotatably inserted into the annular groove.

10. A dust removal device for the taphole of a blast furnace according to claim 2, characterized in that, It also includes a temperature sensor installed inside the water tank, the temperature sensor being used to detect the temperature of the coolant inside the water tank.

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