Coal injection device for a side-blown furnace

Abstract

The utility model discloses a coal injection device for side blown furnace, including main pipeline and material box, the top of main pipeline is provided with material box, the inner wall of material box is provided with the track symmetry, and is provided with mesh screen box between two groups of tracks, the side of mesh screen box close to track all is provided with pulley symmetry, and mesh screen box is through pulley and track sliding connection, the inner wall of material box of mesh screen box one side is provided with servo motor, the output of servo motor is installed with drive shaft, the surface of drive shaft is installed with rotary plate, the eccentric position of rotary plate top end is swinged and is installed with long connecting arm, long connecting arm is away from the one end swinged and installed with short connecting arm of rotary plate, and short connecting arm and mesh screen box swinged and are connected. The utility model not only has realized fine screening coal powder and non-stop maintenance shunt pipe, has facilitated to the filtration discharge of the dust generated to screening coal powder, and moreover has improved the effect of coal powder combustion-supporting.

Description

Technical Field

[0001] This utility model relates to the field of pulverized coal injection technology in metallurgy, specifically a pulverized coal injection device for a side-blown furnace. Background Technology

[0002] A side-blown furnace is a type of process equipment in the metallurgical field. It melts the molten metal by blowing gas into the side of the furnace, primarily used to remove impurities and provide heat. Side-blown converters are metallurgical equipment that uses air or oxygen blown into the side of the furnace for steelmaking. They are mainly divided into three categories: air-blown acid converters, air-blown basic converters, and all-oxygen side-blown converters. The operation process of a side-blown converter is similar to that of a top-blown converter, and the oxidation patterns of various elements are basically the same. However, side-blown converters control the smelting process by adjusting the relative position of the tuyeres and the molten metal surface through the forward and backward tilting of the furnace body. The lead slag produced in the side-blown reduction furnace is introduced into a fuming furnace for smelting. Similarly, a mixture of air and coal is blown into the fuming furnace, using pulverized coal as a reducing agent and combustion aid. Traditional coal blowing devices are mostly single-pipe coal blowing, which is prone to damage over time. Replacement and maintenance require shutting down the side-blown furnace, affecting production efficiency. To improve this situation, a coal injection device for side-blown furnaces is proposed.

[0003] For example, the pulverized coal injection device for a side-blown furnace disclosed in the authorization announcement number CN217465380U includes a short pipe joint, a tuyere, a secondary short pipe joint, a coal-air mixing pipe, and an end cap. The short pipe joint is installed on the outside of the water jacket of the side-blown furnace, the tuyere is installed on the short pipe joint and extends through the short pipe joint into the side-blown furnace, one end of the secondary short pipe joint is connected to the tuyere, and the other end is connected to the coal-air mixing pipe. The end of the coal-air mixing pipe is equipped with a detachable end cap. The inner walls of the tuyere, the secondary short pipe joint, and the coal-air mixing pipe are coated with a wear-resistant ceramic layer to reduce pipe wear. Although it achieves the goal of reducing pipe wear by installing detachable air nozzles on short pipe joints and coating the air nozzles, secondary short pipe joints and air-coal mixing pipes with wear-resistant ceramic layers, and installing detachable and replaceable air nozzles on short pipe joints, it is not necessary to replace the connection parts between the coal injection device and the side-blown furnace, thus extending the service life of the pipeline. However, it did not solve the problems that existing pulverized coal injection devices are not conducive to fine screening of pulverized coal and maintenance of the diversion pipe without shutting down the machine, nor to filtering and discharging the dust generated during pulverized coal screening, thus affecting the pulverized coal combustion effect. Utility Model Content

[0004] The purpose of this utility model is to provide a pulverized coal injection device for a side-blown furnace, so as to solve the problems mentioned in the background art, which are not conducive to fine screening of pulverized coal and maintenance of the diversion pipe without stopping the machine, and are not conducive to filtering and discharging the dust generated by screening pulverized coal, thus affecting the effect of pulverized coal combustion.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pulverized coal injection device for a side-blown furnace, comprising a main pipeline and a material box. The material box is located above the main pipeline. Tracks are symmetrically arranged on the inner wall of the material box, and a mesh screen box is arranged between the two sets of tracks. Pulleys are symmetrically arranged on the side of the mesh screen box near the tracks, and the mesh screen box is slidably connected to the tracks through the pulleys. A servo motor is installed on the inner wall of the material box on one side of the mesh screen box. A drive shaft is installed at the output end of the servo motor. A rotating plate is installed on the surface of the drive shaft. A long connecting arm is movably installed at the eccentric position at the top of the rotating plate. A short connecting arm is movably installed at the end of the long connecting arm away from the rotating plate, and the short connecting arm is movably connected to the mesh screen box. A discharge pipe is installed at the bottom of the material box and is connected to the main pipeline. An air supply fan is installed on the outer wall of one side of the material box, and an air supply pipe is installed at the bottom of the air supply fan and is connected to the main pipeline.

[0006] Preferably, an exhaust fan is provided at the top of the material bin, and a door is movably installed on the top of the material bin on one side of the exhaust fan.

[0007] Preferably, a suction pipe is provided at the top of the exhaust fan, and a liquid storage tank is provided on the outer wall of the other side of the material box.

[0008] Preferably, the suction tube extends into the interior of the liquid storage tank, and a filter block is provided at the top of the liquid storage tank.

[0009] Preferably, a diversion valve body is provided at the end of the main pipeline away from the material box, and diversion pipes are symmetrically provided at the end of the diversion valve body away from the main pipeline.

[0010] Preferably, a hydraulic rod is movably mounted on the top end of the diversion valve body, and a push arm is mounted on the output end of the hydraulic rod.

[0011] Preferably, a linkage arm is provided at the end of the push arm away from the hydraulic rod, and a hinge shaft is provided at the end of the linkage arm near the push arm, and the linkage arm is movably connected to the push arm through the hinge shaft.

[0012] Preferably, a connecting shaft is fixedly installed at the end of the linkage arm away from the push arm, and the connecting shaft extends into the interior of the diversion valve body and is movably connected to the diversion valve body. A valve plate is provided inside the diversion valve body, and the connecting shaft is connected to the valve plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the pulverized coal injection device not only realizes fine screening of pulverized coal and maintenance of the diversion pipe without stopping the machine, but also facilitates the filtration and discharge of dust generated by screening pulverized coal, and improves the combustion-supporting effect of pulverized coal.

[0014] (1) Pour the coal powder into the mesh screen box, close the box door, and the servo motor drives the rotating plate to rotate through the drive shaft. The rotating plate drives the long connecting arm to rotate, and the long connecting arm drives the short connecting arm to swing back and forth. Under the sliding cooperation of the pulley and the track, the short connecting arm drives the mesh screen box to swing back and forth, and the mesh screen box drives the coal powder to swing. Coal powder smaller than the surface holes of the mesh screen box falls into the inside of the material box through the mesh screen box and falls into the inside of the main pipe through the discharge pipe. Particles larger than the surface holes of the mesh screen box remain inside the mesh screen box, thus completing the fine screening of coal powder. The coal powder particles are directly... The smaller the diameter, the better the combustion-supporting effect. Dust is generated during the shaking and screening of pulverized coal. An exhaust fan draws air into the material box, and the dust is sucked into the storage tank through the suction pipe. The storage tank contains water, and the liquid level is above the bottom of the suction pipe. The dust comes into contact with the water and dissolves in the water. The treated exhaust gas is then discharged after being filtered again by the filter block, which avoids the dust being directly discharged into the air and causing air pollution. This achieves fine screening of pulverized coal, facilitates the filtration and discharge of dust generated during the screening of pulverized coal, avoids the dust being directly discharged into the atmosphere and causing environmental pollution, and improves the combustion-supporting effect of pulverized coal.

[0015] (2) The air supply fan sends air into the main pipeline through the air supply pipe. The air supply drives the coal powder in the main pipeline to move and is transported to the side-blown furnace through the diversion valve body and a group diversion pipe. When a group diversion pipe needs maintenance after long-term use, the hydraulic rod drives the push arm to move. The push arm drives the linkage arm to rotate through the hinge shaft. The linkage arm drives the valve plate to rotate through the connecting shaft. The valve plate blocks the diversion pipe that needs maintenance, so that the coal powder passes through another group diversion pipe. This allows the diversion pipe to be maintained without stopping the machine, which improves the convenience of equipment maintenance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a frontal cross-sectional view of the present invention. Figure 3 This is a side view sectional structural diagram of the material box of this utility model; Figure 4 This is a top view cross-sectional structural diagram of the flow divider valve body of this utility model; Figure 5 This is a three-dimensional perspective structural diagram of the material box of this utility model.

[0017] In the diagram: 1. Main pipe; 2. Liquid storage tank; 3. Filter block; 4. Suction pipe; 5. Exhaust fan; 6. Material box; 7. Air supply fan; 8. Box door; 9. Hydraulic rod; 10. Push arm; 11. Discharge pipe; 12. Hinge shaft; 13. Linkage arm; 14. Connecting shaft; 15. Diverter valve body; 16. Diverter pipe; 17. Air supply pipe; 18. Mesh screen box; 19. Valve plate; 20. Servo motor; 21. Rotating plate; 22. Track; 23. Pulley; 24. Drive shaft; 25. Long connecting arm; 26. Short connecting arm. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example 1 Please see Figure 1-5This utility model provides an embodiment of a pulverized coal injection device for a side-blown furnace, comprising a main pipe 1 and a material box 6. The material box 6 is positioned above the main pipe 1. Tracks 22 are symmetrically arranged on the inner wall of the material box 6, and a mesh screen box 18 is positioned between two sets of tracks 22. Pulleys 23 are symmetrically arranged on the side of the mesh screen box 18 closest to the tracks 22, and the mesh screen box 18 is slidably connected to the tracks 22 via the pulleys 23. A servo motor 20 is installed on the inner wall of the material box 6 on one side of the mesh screen box 18, serving as the power drive. A drive shaft 24 is installed at the output end of the machine 20. A rotating plate 21 is installed on the surface of the drive shaft 24. A long connecting arm 25 is movably installed at the eccentric position at the top of the rotating plate 21. A short connecting arm 26 is movably installed at the end of the long connecting arm 25 away from the rotating plate 21. The short connecting arm 26 is movably connected to the mesh screen box 18. A discharge pipe 11 is installed at the bottom of the material box 6. The discharge pipe 11 is connected to the main pipe 1. An air supply fan 7 is installed on the outer wall of one side of the material box 6. An air supply pipe 17 is installed at the bottom of the air supply fan 7. The air supply pipe 17 is connected to the main pipe 1. A suction fan 5 is installed at the top of the material box 6. A box door 8 is movably installed at the top of the material box 6 on one side of the suction fan 5. A suction pipe 4 is installed at the top of the suction fan 5. A liquid storage tank 2 is installed on the outer wall of the other side of the material box 6. The suction tube 4 extends into the interior of the liquid storage tank 2, and a filter block 3 is provided at the top of the liquid storage tank 2; When it is necessary to blow coal into the side-blown furnace, first open the box door 8, pour the pulverized coal into the mesh screen box 18, close the box door 8, turn on the servo motor 20, and the servo motor 20 drives the rotating plate 21 to rotate through the drive shaft 24. The rotating plate 21 drives the long connecting arm 25 to rotate, and the long connecting arm 25 drives the short connecting arm 26 to swing back and forth. Under the sliding cooperation of the pulley 23 and the track 22, the short connecting arm 26 drives the mesh screen box 18 to swing back and forth, and the mesh screen box 18 drives the pulverized coal to shake. Pulverized coal smaller than the surface holes of the mesh screen box 18 falls into the inside of the material box 6 through the mesh screen box 18 and falls into the inside of the main pipe 1 through the discharge pipe 11. Particles and impurities larger than the surface holes of the mesh screen box 18 remain in the mesh screen box. The internal structure of 18 is used to perform fine screening of coal powder. The smaller the particle diameter of the coal powder, the better its combustion-supporting effect. Dust will be generated when the coal powder is shaken and screened. The exhaust fan 5 is turned on and the exhaust fan 5 draws air into the material box 6. The dust is drawn into the liquid storage tank 2 through the suction pipe 4. The liquid storage tank 2 contains water, and the liquid level is above the bottom of the suction pipe 4. The dust comes into contact with the water and dissolves in the water. The treated exhaust gas is discharged after being filtered again by the filter block 3 to avoid the dust being directly discharged into the air and causing air pollution. This achieves fine screening of coal powder, facilitates the filtration and discharge of dust generated during coal powder screening, avoids the dust being directly discharged into the atmosphere and causing environmental pollution, and improves the combustion-supporting effect of coal powder. A diversion valve body 15 is provided at the end of the main pipeline 1 away from the material box 6, and a diversion pipe 16 is symmetrically provided at the end of the diversion valve body 15 away from the main pipeline 1. A hydraulic rod 9 is movably mounted on the top of the diversion valve body 15. The hydraulic rod 9 serves as a power drive. A push arm 10 is mounted on the output end of the hydraulic rod 9. A linkage arm 13 is provided at the end of the push arm 10 away from the hydraulic rod 9. A hinge shaft 12 is provided at the end of the linkage arm 13 close to the push arm 10. The linkage arm 13 is movably connected to the push arm 10 through the hinge shaft 12. A connecting shaft 14 is fixedly installed at the end of the linkage arm 13 away from the push arm 10, and the connecting shaft 14 extends into the interior of the diversion valve body 15 and is movably connected to the diversion valve body 15. A valve plate 19 is provided inside the diversion valve body 15, and the connecting shaft 14 is connected to the valve plate 19. Turn on the air supply fan 7, and the air supply fan 7 will send airflow into the main pipeline 1 through the air supply pipe 17. The airflow will drive the pulverized coal in the main pipeline 1 to move and be transported to the side-blown furnace through the diversion valve body 15 and a set of diversion pipes 16. When the set of diversion pipes 16 needs maintenance after a long period of use, open the hydraulic rod 9, and the hydraulic rod 9 will drive the push arm 10 to move. The push arm 10 will drive the linkage arm 13 to rotate through the hinge shaft 12. The linkage arm 13 will drive the valve plate 19 to rotate through the connecting shaft 14. The valve plate 19 will block the diversion pipe 16 that needs maintenance, so that the pulverized coal passes through the other set of diversion pipes 16. This allows for maintenance of the diversion pipe without shutting down the machine, improving the convenience of equipment maintenance.

[0022] Work steps When coal needs to be blown into the side-blown furnace, first open the box door 8, pour the pulverized coal into the mesh screen box 18, close the box door 8, and the servo motor 20 drives the rotating plate 21 to rotate through the drive shaft 24. The rotating plate 21 drives the long connecting arm 25 to rotate, the long connecting arm 25 drives the short connecting arm 26 to swing back and forth, and the short connecting arm 26 drives the mesh screen box 18 to shake back and forth. The mesh screen box 18 causes the pulverized coal to shake. Pulverized coal smaller than the surface holes of the mesh screen box 18 falls into the inside of the material box 6 and then into the inside of the main pipe 1 through the discharge pipe 11. Particles larger than the surface holes of the mesh screen box 18 remain inside the mesh screen box 18, thus completing the fine screening of pulverized coal. The smaller the particle diameter of the pulverized coal, the better its combustion effect. Dust will be generated during the shaking and screening of pulverized coal. The exhaust fan 5 will draw air into the material box 6 and suck the dust into the storage tank 2 through the suction pipe 4. The storage tank 2 contains water, with the liquid level exceeding the bottom of the suction pipe 4. The smoke and dust come into contact with the water and dissolve in it. The treated exhaust gas is discharged after being filtered again by the filter block 3 to prevent dust from being directly discharged into the air and causing air pollution. The air supply fan 7 sends airflow into the main pipe 1 through the air supply pipe 17. The airflow drives the coal powder in the main pipe 1 to move and is transported to the side-blown furnace through the diversion valve body 15 and a set of diversion pipes 16. When a set of diversion pipes 16 needs maintenance after a long period of use, the hydraulic rod 9 drives the push arm 10 to move. The push arm 10 drives the linkage arm 13 to rotate through the hinge shaft 12. The linkage arm 13 drives the valve plate 19 to rotate through the connecting shaft 14. The valve plate 19 blocks the diversion pipe 16 that needs maintenance, allowing the coal powder to pass through the other set of diversion pipes 16, thereby performing maintenance on the diversion pipe without shutting down the machine. The above is the complete usage of the coal injection device for the side-blown furnace.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pulverized coal injection device for a side-blown furnace, comprising a main pipeline and a feed hopper, characterized in that: A material box is installed above the main pipeline. Tracks are symmetrically arranged on the inner wall of the material box, and a mesh screen box is installed between two sets of tracks. Pulleys are symmetrically arranged on the side of each mesh screen box closest to the track, and the mesh screen box is slidably connected to the track via the pulleys. A servo motor is installed on the inner wall of the material box on one side of the mesh screen box. A drive shaft is installed at the output end of the servo motor. A rotating plate is installed on the surface of the drive shaft. A long connecting arm is movably installed at the eccentric position at the top of the rotating plate. A short connecting arm is movably installed at the end of the long connecting arm away from the rotating plate and is movably connected to the mesh screen box. A discharge pipe is installed at the bottom of the material box and is connected to the main pipeline. An air supply fan is installed on the outer wall of one side of the material box, and an air supply pipe is installed at the bottom of the air supply fan and is connected to the main pipeline.

2. The pulverized coal injection device for a side-blown furnace according to claim 1, characterized in that: An exhaust fan is installed at the top of the material bin, and a door is movably installed on the top of the material bin on one side of the exhaust fan.

3. A pulverized coal injection device for a side-blown furnace according to claim 2, characterized in that: The top of the exhaust fan is equipped with a suction pipe, and a liquid storage tank is installed on the outer wall of the other side of the material box.

4. A pulverized coal injection device for a side-blown furnace according to claim 3, characterized in that: The suction tube extends into the interior of the liquid storage tank, and a filter block is installed at the top of the liquid storage tank.

5. A pulverized coal injection device for a side-blown furnace according to claim 1, characterized in that: A diversion valve body is provided at the end of the main pipeline away from the material box, and diversion pipes are symmetrically arranged at the end of the diversion valve body away from the main pipeline.

6. A pulverized coal injection device for a side-blown furnace according to claim 5, characterized in that: A hydraulic rod is movably mounted on the top of the diversion valve body, and a push arm is mounted on the output end of the hydraulic rod.

7. A pulverized coal injection device for a side-blown furnace according to claim 6, characterized in that: The push arm is provided with a linkage arm at the end away from the hydraulic rod, and the linkage arm is provided with a hinge shaft at the end near the push arm, and the linkage arm is movably connected to the push arm through the hinge shaft.

8. A pulverized coal injection device for a side-blown furnace according to claim 7, characterized in that: A connecting shaft is fixedly installed at the end of the linkage arm away from the push arm, and the connecting shaft extends into the interior of the diversion valve body and is movably connected to the diversion valve body. A valve plate is provided inside the diversion valve body, and the connecting shaft is connected to the valve plate.

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