Dust removal device for blast furnace

Abstract

The utility model belongs to the technical field of blast furnace ironmaking, discloses a blast furnace dust removal device, and aims to solve the problems in the background technology, the following scheme is provided: the blast furnace dust removal device comprises a gravity dust removal pipe, a top smoke exhaust pipe is welded at the top of the gravity dust removal pipe, and a rotating shaft is inserted in the middle of the top smoke exhaust pipe; and the outer wall of the rotating shaft is fixedly sleeved with a sealing cover plate, one side of the rotating shaft is connected with a driving motor, the inner wall of one side of the gravity dust removal pipe is communicated with a smoke inlet pipe in a penetrating mode, and a buffering cover plate is arranged at the top of the smoke inlet pipe. According to the utility model, the manual adjusting ball valve in the gravitational dust removal and ash discharge process is modified, and the steel plate is additionally welded on the wall body on one side, which is scoured, of the wall body of the ball valve, so that the scouring erosion of high-pressure and high-speed dust to the wall body of the ball valve is effectively improved, the abrasion degree of the ball valve and the utilization rate of equipment are reduced, and meanwhile, the forced damping down caused by replacement of the ball valve is avoided; and the yield is reduced, so that the blast furnace can effectively and stably operate.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace ironmaking, in particular to a blast furnace dust removal device. Background Art

[0002] Blast furnace dust ash is the dust of raw materials and fuels discharged along with blast furnace gas during the iron-making process of the blast furnace, as well as particles produced by intense reactions in the high-temperature zone. It contains free and bound states and complexes of various elements such as iron and carbon, among which iron oxide, aluminum oxide, silicon oxide and calcium oxide are the main components. It is a light-weight, tiny-particle ash containing a variety of harmful and toxic substances. It is one of the main solid emissions from steel enterprises.

[0003] The dusty gas produced by blast furnace ironmaking needs to undergo secondary dust removal before it can be converted into clean gas and enter the gas pipeline network for users. Most modern blast furnaces use gravity dust removal for primary dust removal, using gravity to deposit dust ash in the gravity dust collector. When the dust ash accumulates to a certain amount, it needs to be discharged. The process for discharge is to install two 400mm manual ball valves at the lower end of the gravity dust collector, and manually adjust the opening of the ball valve to put the dust ash into a car or train for transportation. However, there are some problems with the existing dust removal device during dust removal:

[0004] 1. Strong corrosion loss. Due to the wear and scouring of the ball valve by pressurized dust particles, the ball valve can only be used for about 6 months, and may leak during normal production. The blast furnace needs to be shut down to replace the ball valve, resulting in interruption of blast furnace production and reduction of output and indicators.

[0005] 2. Poor dust removal effect. When the existing dust collector is used for a long time, a lot of dust will stick to the inner wall of the dust collector. Therefore, when the air flow direction is changed, the dust on the inner wall of the dust collector cannot be quickly and efficiently processed, which will cause the dust on the inner wall of the dust collector to continue to accumulate, resulting in increasingly poor dust removal effect;

[0006] 3. Large dust. In the process of dust removal, the existing dust collector needs to use an external humidifier to humidify the surrounding air, so that when the dust is discharged, it can have a certain dust suppression effect. However, the existing humidifier is cumbersome to install, and the humidification and dust reduction range is effective, but the dust reduction effect is poor. Utility Model Content

[0007] The utility model aims to solve the shortcomings in the prior art and proposes a blast furnace dust removal device.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A blast furnace dust removal device comprises a gravity dust removal pipe, a top smoke exhaust pipe is welded to the top of the gravity dust removal pipe, and a rotating shaft is inserted in the middle of the top smoke exhaust pipe, a sealing cover plate is fixedly sleeved on the outer wall of the rotating shaft, and a driving motor is connected to one side of the rotating shaft, a smoke inlet pipe is penetrated and connected to the inner wall of one side of the gravity dust removal pipe, and a buffer cover plate is arranged on the top of the smoke inlet pipe, a frustum tube is welded to the outer wall of the bottom of the gravity dust removal pipe, and a first automatic regulating ball valve is connected to the bottom of the frustum tube, and a cleaning component is arranged inside the gravity dust removal pipe;

[0010] The cleaning assembly includes a cross bracket fixedly installed at the bottom of the gravity dust removal pipe, and a rotating shaft connecting plate is rotatably arranged in the middle of the cross bracket through a bearing, a double-layer scraper is connected to one side of the rotating shaft connecting plate, a first conveying pipe is connected below the first automatic regulating ball valve, and a second automatic regulating ball valve is connected to the bottom of the first conveying pipe, and a second conveying pipe is connected below the second automatic regulating ball valve;

[0011] A manually adjustable ball valve is connected to the lower part of the second delivery pipe, and a dust exhaust pipe is arranged below the manually adjustable ball valve. A humidifying component is arranged on the outer wall of the second delivery pipe.

[0012] Preferably, a continuously bent buffer plate is provided on the side of the buffer cover plate, and an annular buffer groove is opened on the bottom outer wall of the buffer plate, and the size of the buffer cover plate is compatible with the inner wall size of the gravity dust removal pipe.

[0013] Preferably, a first bevel gear is welded to the top outer wall of the rotating shaft connecting plate, and a second bevel gear is vertically meshed with the first bevel gear, a connecting shaft is fixed at the axis of the second bevel gear, and a servo motor is connected to one side of the connecting shaft.

[0014] Preferably, a spiral scraper is welded to the bottom outer wall of the rotating shaft connecting plate, and the size of the spiral scraper is matched with the size of the inner wall of the frustum tube.

[0015] Preferably, the manually adjustable ball valve comprises a connecting pipe body connected below the second delivery pipe, and a sealing ball is embedded in the middle of the connecting pipe body, and an adjusting valve stem is installed on the side of the sealing ball.

[0016] Preferably, a conveying through groove is formed through the axis of the connecting tube body and the sealing sphere, and a steel plate is provided on the lower inner wall of the connecting tube body.

[0017] Preferably, the humidifying assembly comprises a plug-in rail welded to the side of the second delivery pipe, and a plug-in block is slidably plugged into the inner wall of the plug-in rail, and an annular water pipe is welded to the outer wall of the plug-in block.

[0018] Preferably, the bottom outer wall of the annular water pipe is installed with first atomizing nozzles distributed at equal distances, and the side of the annular water pipe is installed with second atomizing nozzles distributed at equal distances, and the top of the annular water pipe is connected to a water inlet pipe.

[0019] Preferably, the inner wall diameters of the first conveying pipe and the second conveying pipe are 400 nm, and the inner wall size of the dust exhaust pipe is 150 nm.

[0020] The beneficial effects of the utility model are:

[0021] 1. The blast furnace dust removal device designed in this paper is to modify the manually adjusted ball valve in the process of gravity dust removal and discharge, and weld a steel plate on the wall of the ball valve that is eroded, which effectively improves the erosion of the ball valve wall by high-pressure and high-speed dust, reduces the wear of the ball valve and the utilization rate of the equipment, and thus avoids the situation of forced wind stoppage and reduced production due to the replacement of the ball valve, so that the blast furnace can run effectively and stably;

[0022] 2. The blast furnace dust removal device of this design uses a servo motor to drive the double-layer scraper to rotate continuously during the dust removal process, so that the dust adhering to the inner wall of the gravity dust removal pipe can be quickly cleaned, and the rotation cleaning of the bolt scraper can quickly discharge the accumulated dust to avoid dust blockage;

[0023] 3. The blast furnace dust removal device of this design uses vertically distributed atomizing nozzles to continuously spray water mist during the ash discharge process, which can not only improve the humidification effect, but also achieve a better dust reduction effect, thereby reducing dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of the overall structure of a blast furnace dust removal device proposed by the utility model;

[0025] Figure 2 This is a side view of the overall structure of a blast furnace dust removal device proposed by the utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of a blast furnace dust removal device proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of a blast furnace dust removal device proposed by the utility model from a first perspective;

[0028] Figure 5 This is a schematic diagram of the separation structure of a gravity dust removal pipe of a blast furnace dust removal device proposed by the utility model;

[0029] Figure 6 This is a schematic diagram of the disassembly of the gravity dust removal pipe structure of a blast furnace dust removal device proposed by the utility model;

[0030] Figure 7 This is a side view of the structure of a humidifying component of a blast furnace dust removal device proposed by the utility model;

[0031] Figure 8 The utility model is a cross-sectional view of the structure of a manually adjustable ball valve of a blast furnace dust removal device.

[0032] In the figure: 1. gravity dust removal pipe; 2. top smoke exhaust pipe; 3. rotating shaft; 4. sealing cover plate; 5. driving motor; 6. smoke inlet pipe; 7. buffer cover plate; 8. frustum pipe; 9. first automatic regulating ball valve; 10. cross bracket; 11. rotating shaft connecting plate; 12. double-layer scraper; 13. first bevel gear; 14. second bevel gear; 15. connecting shaft; 16. servo motor; 17. spiral scraper; 18. first conveying pipe; 19. second automatic regulating ball valve; 20. second conveying pipe; 21. manual regulating ball valve; 22. dust exhaust pipe; 23. connecting pipe body; 24. sealing ball; 25. regulating valve stem; 26. conveying groove; 27. steel plate; 28. plug-in rail; 29. ​​plug-in block; 30. annular water pipe; 31. first atomizing nozzle; 32. second atomizing nozzle; 33. water inlet pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] Example 1, reference Figure 1-8 A blast furnace dust removal device comprises a gravity dust removal pipe 1, a top smoke exhaust pipe 2 is welded on the top of the gravity dust removal pipe 1, and a rotating shaft 3 is inserted in the middle of the top smoke exhaust pipe 2, a sealing cover plate 4 is fixedly sleeved on the outer wall of the rotating shaft 3, and a driving motor 5 is connected to one side of the rotating shaft 3, a smoke inlet pipe 6 is penetrated and connected to the inner wall of one side of the gravity dust removal pipe 1, and a buffer cover plate 7 is arranged on the top of the smoke inlet pipe 6;

[0035] The side of the buffer cover plate 7 is provided with a continuously bent buffer plate, and the bottom outer wall of the buffer plate is provided with an annular buffer groove, the size of the buffer cover plate 7 is adapted to the inner wall size of the gravity dust removal pipe 1, the bottom outer wall of the gravity dust removal pipe 1 is welded with a frustum tube 8, and the bottom of the frustum tube 8 is connected with a first automatic regulating ball valve 9, and a cleaning component is provided inside the gravity dust removal pipe 1;

[0036] The cleaning assembly includes a cross bracket 10 fixedly mounted at the bottom of the gravity dust removal pipe 1, and a rotating shaft connecting plate 11 is rotatably arranged in the middle of the cross bracket 10 through a bearing, a double-layer scraper 12 is connected to one side of the rotating shaft connecting plate 11, a first bevel gear 13 is welded to the top outer wall of the rotating shaft connecting plate 11, and a second bevel gear 14 is meshed and transmitted in the vertical direction of the first bevel gear 13, a connecting shaft 15 is fixed at the axis of the second bevel gear 14, and a servo motor 16 is connected to one side of the connecting shaft 15;

[0037] By modifying the manually adjustable ball valve 21 in the process of gravity dust removal and ash discharge, and welding a steel plate 27 on the wall of the ball valve on the side that is eroded, the erosion of the ball valve wall by high-pressure and high-speed dust is effectively improved, and the wear degree of the ball valve and the utilization rate of the equipment are reduced. Therefore, the situation of forced wind stoppage due to replacement of the ball valve and reduced production is avoided, so that the blast furnace can be effectively and stably operated;

[0038] The first automatic regulating ball valve 9 is connected to a first delivery pipe 18 at its bottom, and a second automatic regulating ball valve 19 is connected to the bottom of the first delivery pipe 18. The second automatic regulating ball valve 19 is connected to a second delivery pipe 20 at its bottom. A spiral scraper 17 is welded to the outer wall of the bottom of the rotating shaft connecting plate 11, and the size of the spiral scraper 17 is adapted to the inner wall size of the frustum tube 8.

[0039] A manually adjustable ball valve 21 is connected to the lower part of the second delivery pipe 20, and a dust exhaust pipe 22 is arranged below the manually adjustable ball valve 21. A humidifying assembly is arranged on the outer wall of the second delivery pipe 20. The inner wall diameters of the first delivery pipe 18 and the second delivery pipe 20 are 400 nm, and the inner wall size of the dust exhaust pipe 22 is 150 nm.

[0040] In the process of dust discharge, the vertically distributed atomizing nozzles are used to continuously spray water mist, which can not only improve the humidification effect, but also achieve a better dust reduction effect, thereby reducing dust;

[0041] The manual regulating ball valve 21 comprises a connecting pipe body 23 connected to the lower part of the second delivery pipe 20, and a sealing ball 24 is embedded in the middle of the connecting pipe body 23, and a regulating valve stem 25 is installed on the side of the sealing ball 24, and a delivery groove 26 is penetrated at the axis of the connecting pipe body 23 and the sealing ball 24, and a steel plate 27 is provided on the lower inner wall of the connecting pipe body 23;

[0042] The humidification assembly includes a plug-in rail 28 welded to the side of the second delivery pipe 20, and the inner wall of the plug-in rail 28 is slidably plugged with a plug-in block 29, the outer wall of the plug-in block 29 is welded with an annular water pipe 30, the bottom outer wall of the annular water pipe 30 is installed with first atomizing nozzles 31 distributed at equal distances, and the side of the annular water pipe 30 is installed with second atomizing nozzles 32 distributed at equal distances, and the top of the annular water pipe 30 is connected to a water inlet pipe 33.

[0043] When using the blast furnace dust removal device, first assemble the device, then set the smoke inlet pipe 6 inside the gravity dust removal pipe 1, and then continuously introduce dust-containing flue gas. When the flue gas is discharged from the port of the smoke inlet pipe 6, due to the setting of the buffer cover plate 7 above the smoke inlet pipe 6, large particles in the flue gas can be effectively blocked and the rise of large particles can be suppressed, so that smaller particles of flue gas will be discharged from the top smoke exhaust pipe 2 at the top, and larger particles of dust will fall into the inside of the frustum tube 8 at the bottom. When large dust accumulates a lot and gravity dust removal is required, it is only necessary to first use The driving motor 5 is used to drive the rotating shaft 3 to rotate, so that the sealing cover plate 4 will seal the outlet at the top of the top smoke exhaust pipe 2, and then the first automatic regulating ball valve 9 and the second automatic regulating ball valve 19 at the bottom are opened, and after the manual regulating ball valve 21 is manually opened to one-third of the state, due to the effect of high pressure and high speed, it will continuously discharge the accumulated dust, and the wall of the manual regulating ball valve 21 will be continuously impacted by the outside world. At this time, the steel plate 27 at the bottom will block it, reducing the damage of the manual regulating ball valve 21, and the discharged dust will be directly discharged by the dust exhaust pipe 22.

[0044] Example 2, reference Figure 1-7 A blast furnace dust removal device comprises a gravity dust removal pipe 1, a top smoke exhaust pipe 2 is welded on the top of the gravity dust removal pipe 1, and a rotating shaft 3 is inserted in the middle of the top smoke exhaust pipe 2, a sealing cover plate 4 is fixedly sleeved on the outer wall of the rotating shaft 3, and a driving motor 5 is connected to one side of the rotating shaft 3, a smoke inlet pipe 6 is penetrated and connected to the inner wall of one side of the gravity dust removal pipe 1, and a buffer cover plate 7 is arranged on the top of the smoke inlet pipe 6;

[0045] During the dust removal process, the servo motor 16 is used to drive the double-layer scraper 12 to rotate continuously, so that the dust adhering to the inner wall of the gravity dust removal pipe 1 can be quickly cleaned, and the spiral scraper 17 is used to rotate and clean, so that the accumulated dust can be quickly discharged to avoid dust clogging;

[0046] The side of the buffer cover plate 7 is provided with a continuously bent buffer plate, and the bottom outer wall of the buffer plate is provided with an annular buffer groove, the size of the buffer cover plate 7 is adapted to the inner wall size of the gravity dust removal pipe 1, the bottom outer wall of the gravity dust removal pipe 1 is welded with a frustum tube 8, and the bottom of the frustum tube 8 is connected with a first automatic regulating ball valve 9, and a cleaning component is provided inside;

[0047] The cleaning assembly includes a cross bracket 10 fixedly mounted at the bottom of the gravity dust removal pipe 1, and a rotating shaft connecting plate 11 is rotatably arranged in the middle of the cross bracket 10 through a bearing, a double-layer scraper 12 is connected to one side of the rotating shaft connecting plate 11, a first bevel gear 13 is welded to the top outer wall of the rotating shaft connecting plate 11, and a second bevel gear 14 is meshed and transmitted in the vertical direction of the first bevel gear 13, a connecting shaft 15 is fixed at the axis of the second bevel gear 14, and a servo motor 16 is connected to one side of the connecting shaft 15;

[0048] The first automatic regulating ball valve 9 is connected to a first delivery pipe 18 at its bottom, and a second automatic regulating ball valve 19 is connected to the bottom of the first delivery pipe 18. The second automatic regulating ball valve 19 is connected to a second delivery pipe 20 at its bottom. A spiral scraper 17 is welded to the outer wall of the bottom of the rotating shaft connecting plate 11, and the size of the spiral scraper 17 is adapted to the inner wall size of the frustum tube 8.

[0049] A manually adjustable ball valve 21 is connected to the lower part of the second delivery pipe 20, and a dust exhaust pipe 22 is arranged below the manually adjustable ball valve 21. A humidifying assembly is arranged on the outer wall of the second delivery pipe 20. The inner wall diameters of the first delivery pipe 18 and the second delivery pipe 20 are 400 nm, and the inner wall size of the dust exhaust pipe 22 is 150 nm.

[0050] The manual regulating ball valve 21 comprises a connecting pipe body 23 connected to the lower part of the second delivery pipe 20, and a sealing ball 24 is embedded in the middle of the connecting pipe body 23, and a regulating valve stem 25 is installed on the side of the sealing ball 24, and a delivery groove 26 is penetrated at the axis of the connecting pipe body 23 and the sealing ball 24, and a steel plate 27 is provided on the lower inner wall of the connecting pipe body 23;

[0051] The humidification assembly includes a plug-in rail 28 welded to the side of the second delivery pipe 20, and the inner wall of the plug-in rail 28 is slidably plugged with a plug-in block 29, the outer wall of the plug-in block 29 is welded with an annular water pipe 30, the bottom outer wall of the annular water pipe 30 is installed with first atomizing nozzles 31 distributed at equal distances, and the side of the annular water pipe 30 is installed with second atomizing nozzles 32 distributed at equal distances, and the top of the annular water pipe 30 is connected to a water inlet pipe 33.

[0052] When using the blast furnace dust removal device, first assemble the device, then set the smoke inlet pipe 6 inside the gravity dust removal pipe 1, and then continuously introduce dust-containing flue gas. When the flue gas is discharged from the port of the smoke inlet pipe 6, due to the setting of the buffer cover plate 7 above the smoke inlet pipe 6, large particles in the flue gas can be effectively blocked and the rise of large particles can be suppressed, so that smaller particles of flue gas will be discharged from the top smoke exhaust pipe 2 at the top, and larger particles of dust will fall into the inside of the frustum tube 8 at the bottom. When large dust accumulates a lot and gravity dust removal is required, it is only necessary to first use The driving motor 5 drives the rotating shaft 3 to rotate, so that the sealing cover plate 4 will seal the outlet at the top of the top smoke exhaust pipe 2, and then open the first automatic regulating ball valve 9 and the second automatic regulating ball valve 19 at the bottom, and manually open the manual regulating ball valve 21 to one-third of the state, due to the effect of high pressure and high speed, it will continuously discharge the accumulated dust, and the wall of the manual regulating ball valve 21 will be continuously impacted by the outside world. At this time, the steel plate 27 at the bottom will block it, slowing down the damage of the manual regulating ball valve 21, and the discharged dust will be directly discharged by the dust exhaust pipe 22;

[0053] When large particles of dust accumulate and need to be discharged and become clogged, it is only necessary to start the servo motor 16, and use the servo motor 16 to drive the second bevel gear 14 to rotate, thereby meshing and driving the first bevel gear 13 to rotate, and driving the double-layer scraper 12 at the bottom to rotate, so that the dust adhering to the inner wall of the frustum tube 8 can be scraped off, and the continuously rotating spiral scraper 17 can also continuously rotate to disperse the accumulated dust and speed up the dust removal. After the dust is discharged from the dust exhaust pipe 22, the water inlet pipe 33 is continuously injected with water, so that the first atomizing nozzle 31 and the second atomizing nozzle 32 outside continuously spray water mist, so that humidification can be achieved and dust reduction operation can be performed.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A blast furnace dust removal device, comprising a gravity dust removal pipe (1), characterized in that: A top smoke exhaust pipe (2) is welded to the top of the gravity dust removal pipe (1), and a rotating shaft (3) is inserted in the middle of the top smoke exhaust pipe (2); a sealing cover plate (4) is fixedly sleeved on the outer wall of the rotating shaft (3), and a driving motor (5) is connected to one side of the rotating shaft (3); a smoke inlet pipe (6) is penetrated and connected to the inner wall of one side of the gravity dust removal pipe (1), and a buffer cover plate (7) is arranged on the top of the smoke inlet pipe (6); a frustum tube (8) is welded to the outer wall of the bottom of the gravity dust removal pipe (1), and a first automatic regulating ball valve (9) is connected to the bottom of the frustum tube (8); and a cleaning component is arranged inside the gravity dust removal pipe (1); The cleaning assembly comprises a cross bracket (10) fixedly mounted at the bottom of the gravity dust removal pipe (1), and a rotating shaft connecting plate (11) is rotatably arranged in the middle of the cross bracket (10) through a bearing, a double-layer scraper (12) is connected to one side of the rotating shaft connecting plate (11), a first conveying pipe (18) is connected below the first automatic regulating ball valve (9), a second automatic regulating ball valve (19) is connected at the bottom of the first conveying pipe (18), and a second conveying pipe (20) is connected below the second automatic regulating ball valve (19); A manually adjustable ball valve (21) is connected below the second delivery pipe (20), and a dust exhaust pipe (22) is arranged below the manually adjustable ball valve (21); a humidifying component is arranged on the outer wall of the second delivery pipe (20).

2. A blast furnace dust removal device according to claim 1, characterized in that: A continuously bent buffer plate is provided on the side of the buffer cover plate (7), and an annular buffer groove is provided on the bottom outer wall of the buffer plate. The size of the buffer cover plate (7) is compatible with the size of the inner wall of the gravity dust removal pipe (1).

3. A blast furnace dust removal device according to claim 1, characterized in that: A first bevel gear (13) is welded to the top outer wall of the rotating shaft connecting plate (11), and a second bevel gear (14) is meshed and transmitted vertically with the first bevel gear (13), a connecting shaft (15) is fixed at the axis of the second bevel gear (14), and a servo motor (16) is connected to one side of the connecting shaft (15).

4. A blast furnace dust removal device according to claim 3, characterized in that: A spiral scraper (17) is welded to the outer wall of the bottom of the rotating shaft connecting plate (11), and the size of the spiral scraper (17) is compatible with the size of the inner wall of the frustum tube (8).

5. A blast furnace dust removal device according to claim 1, characterized in that: The manually adjustable ball valve (21) comprises a connecting pipe body (23) connected below the second delivery pipe (20), a sealing ball body (24) is embedded in the middle of the connecting pipe body (23), and an adjustable valve stem (25) is installed on the side of the sealing ball body (24).

6. A blast furnace dust removal device according to claim 5, characterized in that: A conveying groove (26) is formed through the axis of the connecting tube body (23) and the sealing ball body (24), and a steel plate (27) is provided on the lower inner wall of the connecting tube body (23).

7. A blast furnace dust removal device according to claim 1, characterized in that: The humidifying assembly comprises a plug-in rail (28) welded to the side of the second delivery pipe (20), and a plug-in block (29) is slidably plugged into the inner wall of the plug-in rail (28), and an annular water pipe (30) is welded to the outer wall of the plug-in block (29).

8. A blast furnace dust removal device according to claim 7, characterized in that: The outer wall of the bottom of the annular water pipe (30) is installed with first atomizing nozzles (31) distributed at equal distances, and the side of the annular water pipe (30) is installed with second atomizing nozzles (32) distributed at equal distances, and the top of the annular water pipe (30) is connected to a water inlet pipe (33).

9. A blast furnace dust removal device according to claim 1, characterized in that: The inner wall diameters of the first conveying pipe (18) and the second conveying pipe (20) are 400 nm, and the inner wall size of the dust exhaust pipe (22) is 150 nm.

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