Blockage-clearing pulverized coal recovery device for blast furnace coal injection gun

Abstract

The utility model discloses an unblocking pulverized coal recovery device for a blast furnace coal injection gun, and relates to the technical field of pulverized coal recovery. The device comprises a recovery hopper and a filter screen, a fixing assembly is arranged on the inner wall of the recovery hopper so as to fix the filter screen in the recovery hopper, a discharging assembly is arranged at the bottom end of the recovery hopper, and a reverse blowing assembly is arranged on the top face of the recovery hopper. According to the utility model, the rotating part of the blowback assembly drives the brush to rotate along the outer surface of the filter screen, so that pulverized coal accumulated on the outer surface of the filter screen is cleaned, and the air blowing part of the blowback assembly blows air outwards to the inner wall of the filter screen during cleaning, so that the pulverized coal is prevented from blocking meshes of the filter screen; and the filtered pulverized coal is accumulated at the bottom end of the interior of the recycling hopper, the pulverized coal accumulated at the bottom end of the interior of the recycling hopper is discharged through the discharging assembly, and efficient recycling of the pulverized coal is achieved.

Description

Technical Field

[0001] This utility model relates to the field of pulverized coal recovery technology, specifically to a pulverized coal recovery device for unclogging blast furnace pulverized coal injection guns. Background Technology

[0002] In the ironmaking process, the pulverized coal injection system in a blast furnace uses compressed air to transport pulverized coal to the vicinity of the blast furnace via pipelines. After branching through a coal distributor, the coal is connected to the air supply devices in front of each tuyer, and then injected into the furnace through the pulverized coal injection lance. This reduces the coke ratio in the blast furnace and lowers ironmaking costs. Pulverized coal blockage is inevitable during the use of the pulverized coal injection lance, requiring timely clearing. During clearing, the discharged waste pulverized coal needs to be treated and recycled, necessitating the use of a recycling device.

[0003] Chinese patent with publication number CN221397899U discloses a pulverized coal recovery device for clearing blockages in a blast furnace pulverized coal injection gun, including a trolley, a support fixedly connected to the upper surface of the trolley, a recovery tank fixedly connected to the outer wall of the support, a top plate slidably connected to the inner wall of the recovery tank, and a feed inlet fixedly connected to the top of the top plate.

[0004] Regarding the aforementioned disclosed technology, a rotating shaft drives a striking head to tap the filter bag to clean the coal dust. While this method allows the filter bag to discharge, prolonged tapping can cause wear and tear on the filter bag material, shortening its service life. Furthermore, the tapping method is inefficient, failing to effectively remove fine coal dust from the filter bag surface, leading to low efficiency and potentially even coal dust blockage.

[0005] Therefore, a pulverized coal recovery device for unclogging blast furnace pulverized coal injection nozzles is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a blast furnace pulverized coal recovery device for unclogging pulverized coal injection guns in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A pulverized coal recovery device for unclogging pulverized coal injection nozzles in blast furnaces includes a recovery hopper and a filter screen. The inner wall of the recovery hopper is provided with a fixing component to fix the filter screen inside the hopper. The bottom end of the recovery hopper is provided with a discharge component, and the top surface of the recovery hopper is provided with a backflushing component to backflush and clean the pulverized coal from the filter screen. The rotating end of the backflushing component is rotatably inserted into the filter screen, and a brush is fixedly sleeved on the end to clean the pulverized coal from the surface of the filter screen.

[0009] Furthermore, an input pipe is fixedly installed on the surface of the recovery hopper, and an output pipe is fixedly installed on the top surface of the recovery hopper. An air pump is fixed at the end of the output pipe so that gas enters the recovery hopper through the input pipe and is discharged through the output pipe. When clearing blockages in the blast furnace pulverized coal injection gun, pulverized coal enters the interior of the recovery hopper through the input pipe.

[0010] Furthermore, the fixing component includes a limiting ring fixedly installed on the inner wall of the recycling hopper, a threaded post fixedly installed on the top surface of the limiting ring, and a filter screen sleeved inside the limiting ring. A positioning groove at the top edge of the filter screen is sleeved with the threaded post, and a nut is threaded onto the surface of the threaded post to fix the filter screen.

[0011] Furthermore, the discharge assembly includes a discharge pipe fixedly installed at the bottom of the recycling hopper, and a first motor is fixedly installed on the bottom surface of the discharge pipe. The output end of the first motor passes through the discharge pipe and is fixedly connected to an auger, which is inside the discharge pipe. A discharge port is fixedly installed on the surface of the discharge pipe, and a powder valve is provided on the surface of the discharge port to control the discharge of coal powder.

[0012] Furthermore, the backflushing assembly includes a U-shaped frame fixedly installed on the top surface of the recovery hopper, and a second motor fixedly installed on the top surface of the U-shaped frame. The output end of the second motor is fixedly connected to a hollow shaft, and the hollow shaft is rotatably inserted into the recovery hopper and the filter screen. A through hole is opened on the surface of the hollow shaft and on the upper side of the top surface of the recovery hopper. A rigid pipe is fixedly connected to the surface of the hollow shaft, and an L-shaped nozzle is connected to the end of the rigid pipe. A collar is fixedly installed on the top surface of the recovery hopper, and the collar and the surface of the hollow shaft are rotatably fitted together. Its through hole is located at the opening of the collar. An air pipe is fixedly connected to the surface of the collar, and an air pump is fixedly connected to the end of the air pipe.

[0013] Furthermore, the brush is fixedly sleeved on the surface of the bottom end of the hollow shaft, and the brush is fitted to the outer wall of the filter screen, while the L-shaped nozzle is located inside the filter screen.

[0014] The beneficial effects of this utility model are as follows:

[0015] After the blast furnace pulverized coal injection gun is cleared, the air containing pulverized coal passes through a filter screen inside the recovery hopper, filtering the pulverized coal. The filtered pulverized coal accumulates on the outer surface of the filter screen. While filtering the pulverized coal, the rotating part of the back-blowing component drives the brush to rotate along the outer surface of the filter screen, thus cleaning the pulverized coal accumulated on the outer surface of the filter screen. At the same time, the blowing part of the back-blowing component blows air outward from the inner wall of the filter screen, thus preventing pulverized coal from clogging the mesh of the filter screen and improving the filtration and recovery efficiency of pulverized coal. The filtered pulverized coal accumulates at the bottom of the recovery hopper and is discharged through the discharge component, achieving efficient recycling and reuse of pulverized coal. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is a side sectional view of the present invention;

[0019] Figure 4 This is a utility model Figure 3 Enlarged view of part A;

[0020] Figure 5 This is a front sectional view of the present invention;

[0021] Figure 6 This is a partial exploded view of this utility model;

[0022] Figure 7 This is a utility model Figure 5 Enlarged view of part B;

[0023] Reference numerals: 1. Recovery hopper; 11. Input pipe; 12. Output pipe; 13. Air pump; 2. Fixing assembly; 201. Limiting ring; 202. Threaded post; 203. Nut; 3. Filter screen; 31. Positioning slot; 4. Discharge assembly; 401. Discharge pipe; 402. First motor; 403. Screwdriver; 404. Discharge port; 405. Powder valve; 5. Backflush assembly; 501. U-shaped frame; 502. Second motor; 503. Hollow shaft; 504. Through hole; 505. Rigid pipe; 506. L-shaped nozzle; 507. Collar; 508. Air pipe; 509. Air pump; 6. Brush. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figures 1 to 7 As shown, a blast furnace pulverized coal cleaning and recovery device for pulverized coal injection guns includes a recovery hopper 1 and a filter screen 3. A fixing component 2 is provided on the inner wall of the recovery hopper 1, and a positioning slot 31 is provided at the edge of the filter screen 3. The fixing component 2 is used to fix the filter screen 3 inside the recovery hopper 1. A discharge component 4 is provided at the bottom of the recovery hopper 1, and a back-blowing component 5 is provided on the top surface of the recovery hopper 1 to back-blow and clean the pulverized coal from the filter screen 3. The rotating end of the back-blowing component 5 is rotatably inserted into the filter screen 3, and a brush 6 is fixedly sleeved at the end to clean the pulverized coal on the surface of the filter screen 3. More specifically, after the blast furnace pulverized coal injection gun is cleared, the air containing pulverized coal passes through the filter screen 3 inside the recovery hopper 1, filtering the pulverized coal. The filtered pulverized coal accumulates on the outer surface of the filter screen 3. While filtering the pulverized coal, the rotating part of the back-blowing component 5 drives the brush 6 to rotate along the outer surface of the filter screen 3, thereby cleaning the pulverized coal accumulated on the outer surface of the filter screen 3. At the same time, the blowing part of the back-blowing component 5 blows air outward from the inner wall of the filter screen 3, thereby preventing pulverized coal from clogging the mesh of the filter screen 3 and improving the filtration and recovery efficiency of pulverized coal. The filtered pulverized coal accumulates at the bottom of the recovery hopper 1, and the discharge component 4 discharges the pulverized coal accumulated at the bottom of the recovery hopper 1, realizing efficient recycling and reuse of pulverized coal.

[0029] An inlet pipe 11 is fixedly installed on the surface of the recovery hopper 1, and an outlet pipe 12 is fixedly installed on the top surface of the recovery hopper 1. An air pump 13 is fixed to the end of the outlet pipe 12, so that gas enters the recovery hopper 1 through the inlet pipe 11 and exits through the outlet pipe 12. During the unclogging of the blast furnace pulverized coal injection gun, pulverized coal enters the interior of the recovery hopper 1 through the inlet pipe 11. More specifically, the inlet pipe 11 on the surface of the recovery hopper 1 introduces air containing pulverized coal after the blast furnace pulverized coal injection gun is unclogging into the interior of the recovery hopper 1, and the air pump 13 accelerates the airflow speed inside the recovery hopper 1.

[0030] The fixing component 2 includes a limiting ring 201 fixedly installed on the inner wall of the recycling hopper 1. A threaded post 202 is fixedly installed on the top surface of the limiting ring 201, and the filter screen 3 is sleeved inside the limiting ring 201. The positioning groove 31 at the top edge of the filter screen 3 is sleeved with the threaded post 202, and a nut 203 is threaded onto the surface of the threaded post 202 to fix the filter screen 3. More specifically, the nut 203 is threaded onto the surface of the threaded post 202 by correspondingly inserting the positioning groove 31 at the top edge of the filter screen 3 into the threaded post 202 on the top surface of the limiting ring 201, thereby fixing the filter screen 3 inside the recycling hopper 1.

[0031] The discharge assembly 4 includes a discharge pipe 401 fixedly installed at the bottom of the recovery hopper 1, and a first motor 402 fixedly installed on the bottom surface of the discharge pipe 401. The output end of the first motor 402 passes through the discharge pipe 401 and is fixedly connected to an auger 403, which is located inside the discharge pipe 401. A discharge port 404 is fixedly installed on the surface of the discharge pipe 401, and a powder valve 405 is provided on the surface of the discharge port 404 to control the discharge of coal powder. More specifically, by opening the powder valve 405, the first motor 402 drives the auger 403 to rotate. Because the auger 403 is located inside the discharge pipe 401, the coal powder accumulated at the bottom of the inner side of the recovery hopper 1 is vertically conveyed downward along the discharge pipe 401 and discharged through the discharge port 404.

[0032] The backflush assembly 5 includes a U-shaped frame 501 fixedly installed on the top surface of the recovery hopper 1, and a second motor 502 fixedly installed on the top surface of the U-shaped frame 501. A hollow shaft 503 is fixedly connected to the output end of the second motor 502, and the hollow shaft 503 is rotatably inserted into the recovery hopper 1 and the filter screen 3. A through hole 504 is opened on the surface of the hollow shaft 503 and on the upper side of the top surface of the recovery hopper 1. A rigid pipe 505 is fixedly connected to the surface of the hollow shaft 503, and an L-shaped nozzle 506 is connected to the end of the rigid pipe 505. A collar 507 is fixedly installed on the top surface of the recovery hopper 1, and the collar 507 and the surface of the hollow shaft 503 are rotatably fitted together. The through hole 504 is located at the opening of the collar 507. An air pipe 508 is fixedly connected to the surface of the collar 507, and an air pump 509 is fixedly connected to the end of the air pipe 508. More specifically, the second motor 502 drives the hollow shaft 503, rigid pipe 505, and L-shaped nozzle 506 to rotate. The hollow shaft 503 synchronously drives the brush 6 to rotate along the outer surface of the filter screen 3, thereby cleaning the outer surface of the filter screen 3 with coal dust. At the same time, the air pump 509 introduces air into the collar 507 through the air pipe 508. Then, the air enters through the through hole 504 on the surface of the hollow shaft 503 and is sprayed out through the L-shaped nozzle 506, blowing air from the inside to the outside of the filter screen 3 to prevent coal dust from clogging the mesh of the filter screen 3.

[0033] The brush 6 is fixedly sleeved on the surface of the bottom end of the hollow shaft 503, and the brush 6 is fitted against the outer wall of the filter screen 3. The L-shaped nozzle 506 is located inside the filter screen 3. More specifically, by fitting the brush 6 against the outer wall of the filter screen 3, the coal dust on the outer wall of the filter screen 3 is cleaned.

[0034] In summary: After the blast furnace pulverized coal injection gun is cleared, the air containing pulverized coal passes through the filter screen 3 inside the recovery hopper 1, filtering the pulverized coal. The filtered pulverized coal accumulates on the outer surface of the filter screen 3. While filtering the pulverized coal, the rotating part of the back-blowing component 5 drives the brush 6 to rotate along the outer surface of the filter screen 3, thereby cleaning the pulverized coal accumulated on the outer surface of the filter screen 3. At the same time, the blowing part of the back-blowing component 5 blows air outward from the inner wall of the filter screen 3, thereby preventing pulverized coal from clogging the mesh of the filter screen 3 and improving the filtration and recovery efficiency of pulverized coal. The filtered pulverized coal accumulates at the bottom of the recovery hopper 1, and the discharge component 4 discharges the pulverized coal accumulated at the bottom of the recovery hopper 1, achieving efficient recovery and reuse of pulverized coal.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A de-blocking and coal powder recovery device for a blast furnace coal injection gun, characterized in that, The utility model provides a kind of coal dust recovery device, including recovery hopper (1) and filter screen (3), the inner wall of the recovery hopper (1) is provided with fixed component (2), to fix filter screen (3) inside the recovery hopper (1), the bottom end of the recovery hopper (1) is provided with discharge component (4), the top surface of the recovery hopper (1) is provided with backflush component (5), to backflush cleaning coal dust to filter screen (3), the rotary end of the backflush component (5) is rotatably inserted with filter screen (3), and end fixedly sheathed with brush (6), to clean the coal dust on the surface of filter screen (3).

2. The device according to claim 1, characterized in that, The surface of the recovery hopper (1) is fixedly installed with input pipe (11), the top surface of the recovery hopper (1) is fixedly installed with output pipe (12), and the end of the output pipe (12) is fixedly provided with suction pump (13), so that the gas enters the recovery hopper (1) through the input pipe (11) and is discharged through the output pipe (12), and the coal dust enters the inside of the recovery hopper (1) through the input pipe (11) when the blast furnace coal injection gun is unblocked.

3. The device according to claim 1, characterized in that, The fixed component (2) includes a limiting ring (201) fixedly installed on the inner wall of the recovery hopper (1), a threaded column (202) fixedly installed on the top surface of the limiting ring (201), and the filter screen (3) is sleeved in the limiting ring (201), the positioning clamping groove (31) at the top end edge of the filter screen (3) is sleeved with the threaded column (202), and the surface of the threaded column (202) is threadedly sleeved with a nut (203) to fix the filter screen (3).

4. The clogging removal and pulverized coal recovery device for a coal injection lance of a blast furnace according to claim 1, characterized by, The discharge component (4) includes a discharge pipe (401) fixedly installed on the bottom end of the recovery hopper (1), a first motor (402) fixedly installed on the bottom surface of the discharge pipe (401), an output end of the first motor (402) fixedly connected with an auger (403) penetrating through the discharge pipe (401), and the auger (403) is in the inside of the discharge pipe (401), a discharge port (404) fixedly installed on the surface of the discharge pipe (401), and a powder valve (405) provided on the surface of the discharge port (404) to control the discharge of the coal dust.

5. The clogging removal and pulverized coal recovery device for a coal injection lance of a blast furnace according to claim 1, characterized by, The backflush component (5) includes a U-shaped frame (501) fixedly installed on the top surface of the recovery hopper (1), a second motor (502) fixedly installed on the top surface of the U-shaped frame (501), an output end of the second motor (502) fixedly connected with a hollow shaft (503), and the hollow shaft (503) is rotatably inserted with the recovery hopper (1) and the filter screen (3), a through hole (504) is formed on the surface of the hollow shaft (503) and located on the upper side of the top surface of the recovery hopper (1), a hard pipe (505) fixedly connected with the surface of the hollow shaft (503), an end of the hard pipe (505) connected with an L-shaped nozzle (506), a sleeve ring (507) fixedly installed on the top surface of the recovery hopper (1), the surface of the sleeve ring (507) and the hollow shaft (503) are rotatably sleeved, the through hole (504) is located at the opening of the sleeve ring (507), a gas pipe (508) fixedly connected with the surface of the sleeve ring (507), and an end of the gas pipe (508) fixedly connected with a gas pump (509).

6. The clogging removal and pulverized coal recovery device of a coal injection lance of a blast furnace according to claim 5, characterized in that, The brush (6) is fixedly sleeved on the surface of the bottom end of the hollow shaft (503), and the brush (6) is in abutment with the outer side wall of the filter screen (3), and the L-shaped nozzle (506) is located in the inside of the filter screen (3).

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