Oxygen-enriched coal injection device for blast furnace smelting

Abstract

The utility model relates to the technical field of blast furnace smelting, and discloses an oxygen-enriched coal injection device for blast furnace smelting, which comprises support frames, a transmission belt and a connecting rod, one sides of the four support frames are fixedly connected with the same tank body, the top of the tank body is provided with a tank cover, the right side of the tank body is fixedly connected with a servo motor, and the servo motor is fixedly connected with the transmission belt. And the output end of the servo motor penetrates through the tank body and is fixedly connected with a first crushing roller, a transparent fixing plate is fixedly connected to the middle of the left side of the tank body, and the servo motor is fixedly connected to the outer side of the transparent fixing plate. According to the utility model, the servo motor can drive the movable rod to rotate, the movable shaft can rotate along with the movable rod, and at the moment, the two discs can rotate simultaneously, so that the first rotating shaft can be driven to rotate, the second rotating shaft can also rotate along with the first rotating shaft, and the distance between the first crushing roller and the second crushing roller can be adjusted, so that the required pulverized coal particle size can be obtained; and the pulverized coal can be fully combusted.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace smelting, in particular to an oxygen-enriched coal injection device for blast furnace smelting. Background Art

[0002] Blast furnace smelting is the core link of steel production, so blast furnace plays a vital role in the iron-making process. The combustion process in the blast furnace will directly affect the furnace temperature, smelting efficiency and fuel utilization efficiency.

[0003] In order to improve the blast furnace smelting efficiency and reduce energy consumption, oxygen-enriched coal injection technology is needed. The most common equipment in oxygen-enriched coal injection technology is the oxygen-enriched coal injection device, which can increase the oxygen content in the blast to enhance the combustion of coal powder, thereby improving the blast furnace smelting efficiency.

[0004] However, most of the oxygen-enriched coal injection devices currently available on the market for blast furnace smelting have incomplete combustion of coal powder due to imprecise control of parameters such as coal powder particle size and injection speed during the injection process, which easily produces a large amount of smoke and harmful gases, polluting the environment and affecting product quality, and thus cannot meet the needs of users. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an oxygen-enriched coal injection device for blast furnace smelting, aiming to improve the problem that the oxygen-enriched coal injection device for blast furnace smelting in the prior art is inconvenient to adjust the coal powder particle size according to actual use needs.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an oxygen-enriched coal injection device for blast furnace smelting, comprising a support frame, a transmission belt and a connecting rod, one side of the four support frames is fixedly connected to the same tank body, a tank cover is arranged on the top of the tank body, a servo motor is fixedly connected to the right side of the tank body, the output end of the servo motor passes through the tank body and is fixedly connected to the first crushing roller, a transparent fixing plate is fixedly connected to the middle part of the left side of the tank body, a servo motor is fixedly connected to the outer side of the transparent fixing plate, the output end of the servo motor passes through the transparent fixing plate and is fixedly connected to a movable rod, the inner side of the transparent fixing plate is rotatably connected to a movable shaft, the movable shaft and the outer sides of the movable rod are fixedly connected to pulleys, and the two pulleys are connected by the The transmission belt is connected for transmission, the right ends of the movable shaft and the movable rod are fixedly connected with a disc, one side of the right end of the disc is fixedly connected with a fixed rod, the right end of the fixed rod is rotatably connected with the first rotating shaft, the inner left side of the tank body is fixedly connected with a limiting plate, one side of the limiting plate is provided with a limiting groove, the inner front and rear sides of the limiting groove are slidably connected with a limiting block, the left side of the limiting block is rotatably connected with a second rotating shaft, the two second rotating shafts are respectively connected to the corresponding first rotating shaft through the connecting rod, the right side of the limiting block is fixedly connected with a U-shaped frame, the right side of the U-shaped frame is fixedly connected with a micro motor, the output ends of the two micro motors respectively pass through the corresponding U-shaped frames and are fixedly connected with the second crushing roller, and the bottom end of the tank body is provided with a coal injection mechanism.

[0007] Through the above technical solution, the distance between the first crushing roller and the second crushing roller can be adjusted, so that the required coal powder particle size can be obtained, the coal powder can be fully burned, the blast furnace smelting efficiency is improved, and the needs of users can be met.

[0008] As a further description of the above technical solution:

[0009] The coal injection mechanism includes an air pump and an arc-shaped scraper, the air pump is fixedly connected to the left side of the tank body, the output end of the air pump passes through the tank body and is connected to an air outlet pipe, the input end of the air pump is connected to an air inlet pipe, the bottom end of the tank body is connected to an L-shaped pipe, the right end of the L-shaped pipe is connected to a coal injection pipe, a cross fixing plate is fixedly connected to the middle of the left end of the coal injection pipe, a rotating rod is rotatably connected to the middle of the right side of the cross fixing plate, an impeller is fixedly connected to the middle of the outer side of the rotating rod, a plurality of support rods are fixedly connected to the left and right sides of the outer wall of the rotating rod at equal distances, and one end of the plurality of support rods is respectively fixedly connected to one side of the corresponding arc-shaped scraper.

[0010] By means of the above technical solution, the coal powder remaining on the inner wall of the coal injection pipe can be scraped off, thereby saving resources and further improving the practicability of the device.

[0011] As a further description of the above technical solution:

[0012] The top end of the tank cover is connected with a material feed port, and the bottom end of the tank cover is fixedly connected with a material guide frame.

[0013] Through the above technical solution, the pulverized coal material can be easily injected into the tank body, and the provided material guide frame can guide the pulverized coal material.

[0014] As a further description of the above technical solution:

[0015] The coal injection mechanism further comprises an oxygen pipe, which is connected to the top of the coal injection pipe, and an electric valve is arranged on the outer side of the oxygen pipe.

[0016] Through the above technical solution, oxygen can be easily injected into the coal injection pipe.

[0017] As a further description of the above technical solution:

[0018] A controller is fixedly connected to the front side of the tank body, and the controller is electrically connected to the air pump, the electric valve, the servo motor, the servo motor and the micro motor respectively.

[0019] Through the above technical solution, the operation of the air pump, the electric valve, the servo motor, the servomotor and the micro motor can be controlled.

[0020] As a further description of the above technical solution:

[0021] A protective cover is arranged on the outer side of the controller, and one side of the protective cover is rotatably connected to the front side of the tank body.

[0022] Through the above technical solution, the controller can be less susceptible to damage, thereby increasing its service life.

[0023] As a further description of the above technical solution:

[0024] Bolts are threadedly connected to the left and right sides of the tank cover, and one end of the bolt passes through the tank cover and the tank body in sequence.

[0025] By means of the above technical solution, the limit on the tank cover can be released, and the tank cover can be removed to carry out inspection and maintenance work on the inside of the tank body.

[0026] As a further description of the above technical solution:

[0027] The sizes of the plurality of arc-shaped scrapers are all matched with the internal size of the coal injection pipe.

[0028] Through the above technical solution, the scraping work of the arc scraper can be made more comprehensive.

[0029] The utility model has the following beneficial effects:

[0030] 1. In the utility model, the movable rod can be driven to rotate by the servo motor, and the pulley on the outer side thereof will rotate accordingly, and the pulley on the movable shaft will also rotate accordingly through the transmission belt. At this time, the two discs will rotate simultaneously, thereby driving the first rotating shaft to rotate, and the second rotating shaft will also rotate accordingly through the connecting rod, thereby driving the limit block to move inside the limit groove. At this time, the U-shaped frames on both sides will move toward the middle accordingly, and the distance between the first crushing roller and the second crushing roller can be adjusted, so as to obtain the required coal powder particle size, so that the coal powder can be fully burned, thereby improving the smelting efficiency of the blast furnace, and thus being able to meet the needs of users.

[0031] 2. In the utility model, the ground coal powder can be blown into the coal injection pipe through an air pump, and then the coal powder can be sprayed into the blast furnace through the coal injection pipe. When the coal powder enters the coal injection pipe, the impeller will rotate with the fluid entering. At this time, the arc scraper will rotate to scrape off the coal powder remaining on the inner wall of the coal injection pipe, thereby saving resources and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a three-dimensional diagram of an oxygen-enriched coal injection device for blast furnace smelting proposed by the utility model;

[0033] Figure 2 This is a partial structural cross-sectional view of an oxygen-enriched coal injection device for blast furnace smelting proposed by the utility model;

[0034] Figure 3 This is a cross-sectional view of the coal injection pipe structure of an oxygen-enriched coal injection device for blast furnace smelting proposed by the utility model;

[0035] Figure 4 This is a partial structural exploded view of an oxygen-enriched coal injection device for blast furnace smelting proposed by the utility model;

[0036] Figure 5 for Figure 4 Enlarged view of point A.

[0037] Legend:

[0038] 1. Support frame; 2. Coal injection mechanism; 201. Air pump; 202. Air inlet pipe; 203. Air outlet pipe; 204. L-shaped pipe; 205. Coal injection pipe; 206. Cross fixing plate; 207. Rotating rod; 208. Impeller; 209. Support rod; 210. Arc scraper; 211. Oxygen pipe; 212. Electric valve; 3. Tank body; 4. Tank cover; 5. Servo motor; 6. First crushing roller; 7. Transparent fixing plate; 8. Servo motor Servo motor; 9. movable rod; 10. movable shaft; 11. pulley; 12. transmission belt; 13. disc; 14. fixed rod; 15. first rotating shaft; 16. limit plate; 17. limit groove; 18. limit block; 19. second rotating shaft; 20. connecting rod; 21. U-shaped frame; 22. micro motor; 23. second crushing roller; 24. feed port; 25. guide frame; 26. bolt; 27. controller; 28. protective cover. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Reference Figure 1 , Figure 4 and Figure 5The utility model provides an embodiment: an oxygen-enriched coal injection device for blast furnace smelting, comprising a support frame 1, a transmission belt 12 and a connecting rod 20, one side of the four support frames 1 is fixedly connected to the same tank body 3, a tank cover 4 is arranged on the top of the tank body 3, a servo motor 5 is fixedly connected to the right side of the tank body 3, the output end of the servo motor 5 passes through the tank body 3 and is fixedly connected to the first crushing roller 6, a transparent fixing plate 7 is fixedly connected to the middle part of the left side of the tank body 3, a servo motor 8 is fixedly connected to the outer side of the transparent fixing plate 7, the output end of the servo motor 8 passes through the transparent fixing plate 7 and is fixedly connected to a movable rod 9, the inner side of the transparent fixing plate 7 is rotatably connected to a movable shaft 10, the movable shaft 10 and the outer side of the movable rod 9 are fixedly connected to pulleys 11, the two pulleys 11 are connected by a transmission belt 12 for transmission, and the movable shaft 10 is connected to the outer side of the movable rod 9. The right ends of 10 and the movable rod 9 are fixedly connected with a disc 13, one side of the right end of the disc 13 is fixedly connected with a fixed rod 14, the right end of the fixed rod 14 is rotatably connected with a first rotating shaft 15, the inner left side of the tank body 3 is fixedly connected with a limiting plate 16, one side of the limiting plate 16 is provided with a limiting groove 17, the inner front and rear sides of the limiting groove 17 are slidably connected with a limiting block 18, the left side of the limiting block 18 is rotatably connected with a second rotating shaft 19, the two second rotating shafts 19 are respectively connected to the corresponding first rotating shaft 15 through a connecting rod 20, the right side of the limiting block 18 is fixedly connected with a U-shaped frame 21, the right side of the U-shaped frame 21 is fixedly connected with a micro motor 22, the output ends of the two micro motors 22 respectively penetrate the corresponding U-shaped frame 21 and are fixedly connected with a second crushing roller 23, and the bottom end of the tank body 3 is provided with a coal injection mechanism 2;

[0041] Specifically, the movable rod 9 can be driven to rotate by the servo motor 8, and the pulley 11 on the movable rod 9 will also rotate accordingly. As the movable shaft 10 rotates accordingly, the two discs 13 can be driven to rotate simultaneously. At this time, the rotation of the disc 13 can further drive the rotation of the first rotating shaft 15. At the same time, the second rotating shaft 19 is connected to the first rotating shaft 15 through the connecting rod 20, thereby realizing synchronous rotation with the first rotating shaft 15. As the second rotating shaft 19 rotates, the limit block 18 will move inside the limit groove 17, thereby realizing precise adjustment of the U-shaped frames 21 on both sides. As the U-shaped frame 21 moves, the distance between the first crushing roller 6 and the second crushing roller 23 also changes accordingly. At this time, by observing the transparent fixing plate 7, the distance between the first crushing roller 6 and the second crushing roller 23 can be intuitively understood, thereby realizing precise control of the coal powder particle size. This precise particle size control helps to improve the combustion efficiency of coal powder, thereby improving the overall efficiency of blast furnace smelting.

[0042] Reference Figure 1 , Figure 2 and Figure 3The coal injection mechanism 2 includes an air pump 201 and an arc scraper 210. The air pump 201 is fixedly connected to the left side of the tank body 3. The output end of the air pump 201 passes through the tank body 3 and is connected to an air outlet pipe 203. The input end of the air pump 201 is connected to an air inlet pipe 202. The bottom end of the tank body 3 is connected to an L-shaped pipe 204. The right end of the L-shaped pipe 204 is connected to a coal injection pipe 205. The middle part of the left end of the coal injection pipe 205 is fixedly connected to a cross fixing plate 206. The middle part of the right side of the cross fixing plate 206 is rotatably connected to a rotating rod 207. An impeller 208 is fixedly connected to the middle of the outer side of the rod 207, and multiple support rods 209 are fixedly connected to the left and right sides of the outer wall of the rotating rod 207 at equal intervals. One end of the multiple support rods 209 is fixedly connected to one side of the corresponding arc scraper 210, and the sizes of the multiple arc scrapers 210 are matched with the internal size of the coal injection pipe 205. The coal injection mechanism 2 also includes an oxygen pipe 211, which is connected to the top of the coal injection pipe 205. An electric valve 212 is arranged on the outer side of the oxygen pipe 211;

[0043] Specifically, the air pump 201 is started to blow the ground coal powder into the coal injection pipe 205. The coal injection pipe 205, as a channel for coal powder transportation, can ensure that the coal powder can be smoothly and efficiently sprayed into the blast furnace. At the same time, the electric valve 212 is opened, and the external oxygen in the oxygen pipe 211 can be input into the coal injection pipe 205. This design helps to strengthen the combustion of coal powder in the blast furnace. When the coal powder enters the coal injection pipe 205, the impeller 208 will rotate accordingly. This rotation not only helps to transport the coal powder, but also prevents the coal powder from being blocked in the coal injection pipe 205. At the same time, the arc scraper 210 will scrape off the coal powder remaining on the inner wall of the coal injection pipe 205 as the impeller 208 rotates. This design effectively avoids the waste of coal powder, improves the efficiency of resource utilization, and thus enhances the practicality of the device.

[0044] Reference Figure 1 and Figure 2 The top of the tank cover 4 is connected to a feed port 24, and the bottom of the tank cover 4 is fixedly connected to a material guide frame 25;

[0045] Specifically, the pulverized coal material can be conveniently injected into the tank body 3 through the feed port 24 , and the provided material guide frame 25 can guide the pulverized coal material so that it can accurately fall between the first crushing roller 6 and the second crushing roller 23 .

[0046] Reference Figure 1 A controller 27 is fixedly connected to the front side of the tank body 3, and the controller 27 is electrically connected to the air pump 201, the electric valve 212, the servo motor 5, the servo motor 8 and the micro motor 22 respectively. A protective cover 28 is arranged on the outside of the controller 27, and one side of the protective cover 28 is rotatably connected to the front side of the tank body 3;

[0047] Specifically, the air pump 201, the electric valve 212, the servo motor 5, the servo motor 8 and the micro motor 22 can be controlled by the controller 27, and the protective cover 28 can protect the controller 27 from being damaged by external factors.

[0048] Reference Figure 1 and Figure 2 The left and right sides of the tank cover 4 are both threadedly connected with bolts 26, and one end of the bolt 26 passes through the tank cover 4 and the tank body 3 in sequence;

[0049] Specifically, the limit of the tank cover 4 can be released by the bolt 26, and the tank cover 4 can be removed to perform inspection and maintenance work on the inside of the tank body 3.

[0050] Working principle: When using the device, first inject the pulverized coal raw material into the tank body 3 through the feed port 24. At this time, the pulverized coal raw material will fall to the middle position of the top of the first crushing roller 6 and the second crushing roller 23 along with the guide frame 25. At this time, the servo motor 5 and the micro motor 22 are started. The servo motor 5 can drive the first crushing roller 6 to rotate, and the micro motor 22 can drive the second crushing roller 23 to rotate, so as to crush the pulverized coal raw material. At this time, the servo motor 8 can drive the movable rod 9 to rotate, and the pulley 11 on the outer side will rotate accordingly, and the pulley 11 on the movable shaft 10 will also rotate through the transmission belt 12. The two discs 13 rotate simultaneously, thereby driving the first rotating shaft 15 to rotate, and the second rotating shaft 19 rotates along with it through the connecting rod 20, thereby driving the limit block 18 to move inside the limit groove 17. At this time, the U-shaped frames 21 on both sides move toward the middle, thereby adjusting the distance between the first crushing roller 6 and the second crushing roller 23. At this time, the distance between the first crushing roller 6 and the second crushing roller 23 can be determined by observing the transparent fixing plate 7, so that the required coal powder particle size can be obtained, so that the coal powder can be fully burned, the blast furnace smelting efficiency is improved, and the needs of users can be met;

[0051] And the crushed coal powder will fall to the bottom of the inner side of the tank body 3. At this time, the oxygen pipe 211 is first connected to the external oxygen supply pipe. At this time, the air pump 201 and the electric valve 212 are started. The air pump 201 can blow the ground coal powder into the coal injection pipe 205, and then the coal powder can be sprayed into the blast furnace through the coal injection pipe 205. The electric valve 212 can open the oxygen pipe 211. At this time, external oxygen can be input into the coal injection pipe 205, which can enhance the combustion of coal powder in the blast furnace and thus improve the smelting efficiency of the blast furnace. When the coal powder enters the coal injection pipe 205, the impeller 208 will rotate with the fluid entering. At this time, the arc scraper 210 will rotate with it to scrape off the coal powder remaining on the inner wall of the coal injection pipe 205, thereby saving resources and thus improving the practicality of the device.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oxygen-enriched coal injection device for blast furnace smelting, comprising a support frame (1), a transmission belt (12) and a connecting rod (20), characterized in that: One side of the four support frames (1) is fixedly connected to the same tank body (3), a tank cover (4) is arranged on the top of the tank body (3), a servo motor (5) is fixedly connected to the right side of the tank body (3), the output end of the servo motor (5) passes through the tank body (3) and is fixedly connected to the first crushing roller (6), a transparent fixing plate (7) is fixedly connected to the middle of the left side of the tank body (3), the outer side of the transparent fixing plate (7) is fixedly connected to the servo motor (8), the output end of the servo motor (8) passes through the transparent fixing plate (7) and is fixedly connected to a movable rod (9), the inner side of the transparent fixing plate (7) is rotatably connected to a movable shaft (10), the outer sides of the movable shaft (10) and the movable rod (9) are both fixedly connected to a pulley (11), the two pulleys (11) are connected to each other by the transmission belt (12), the right ends of the movable shaft (10) and the movable rod (9) are both fixedly connected to a disc (13), A fixing rod (14) is fixedly connected to one side of the right end of the disc (13), and the right end of the fixing rod (14) is rotatably connected to a first rotating shaft (15). A limiting plate (16) is fixedly connected to the left side of the interior of the tank body (3), and a limiting groove (17) is provided on one side of the limiting plate (16). The front and rear sides of the limiting groove (17) are slidably connected to a limiting block (18). A second rotating shaft (19) is rotatably connected to the left side of the limiting block (18), and two second rotating shafts (19) are respectively connected to the corresponding first rotating shaft (15) through the connecting rod (20). A U-shaped frame (21) is fixedly connected to the right side of the limiting block (18), and a micro motor (22) is fixedly connected to the right side of the U-shaped frame (21). The output ends of the two micro motors (22) respectively penetrate the corresponding U-shaped frames (21) and are fixedly connected to second crushing rollers (23). A coal injection mechanism (2) is provided at the bottom end of the tank body (3).

2. The oxygen-enriched coal injection device for blast furnace smelting according to claim 1, characterized in that: The coal injection mechanism (2) comprises an air pump (201) and an arc-shaped scraper (210); the air pump (201) is fixedly connected to the left side of the tank body (3); the output end of the air pump (201) passes through the tank body (3) and is connected to an air outlet pipe (203); the input end of the air pump (201) is connected to an air inlet pipe (202); the bottom end of the tank body (3) is connected to an L-shaped pipe (204); the right end of the L-shaped pipe (204) is connected to a coal injection pipe (205); A cross fixing plate (206) is fixedly connected to the middle of the left end of the coal injection pipe (205), a rotating rod (207) is rotatably connected to the middle of the right side of the cross fixing plate (206), an impeller (208) is fixedly connected to the middle of the outer side of the rotating rod (207), and a plurality of support rods (209) are fixedly connected to the left and right sides of the outer wall of the rotating rod (207) at equal intervals, and one end of each of the plurality of support rods (209) is fixedly connected to one side of a corresponding arc-shaped scraper (210).

3. The oxygen-enriched coal injection device for blast furnace smelting according to claim 1, characterized in that: The top end of the tank cover (4) is connected to a material feed port (24), and the bottom end of the tank cover (4) is fixedly connected to a material guide frame (25).

4. The oxygen-enriched coal injection device for blast furnace smelting according to claim 2, characterized in that: The coal injection mechanism (2) further comprises an oxygen pipe (211), wherein the oxygen pipe (211) is connected to the top of the coal injection pipe (205), and an electric valve (212) is arranged on the outside of the oxygen pipe (211).

5. The oxygen-enriched coal injection device for blast furnace smelting according to claim 1, characterized in that: A controller (27) is fixedly connected to the front side of the tank body (3), and the controller (27) is electrically connected to the air pump (201), the electric valve (212), the servo motor (5), the servo motor (8), and the micro motor (22), respectively.

6. The oxygen-enriched coal injection device for blast furnace smelting according to claim 5, characterized in that: A protective cover (28) is provided on the outside of the controller (27), and one side of the protective cover (28) is rotatably connected to the front side of the tank body (3).

7. The oxygen-enriched coal injection device for blast furnace smelting according to claim 1, characterized in that: Bolts (26) are threadedly connected to the left and right sides of the tank cover (4), and one end of the bolt (26) passes through the tank cover (4) and the tank body (3) in sequence.

8. The oxygen-enriched coal injection device for blast furnace smelting according to claim 2, characterized in that: The sizes of the plurality of arc-shaped scrapers (210) all match the internal size of the coal injection pipe (205).

Images