Coal injection device capable of adjusting oxygen enrichment for blast furnace smelting

Abstract

The utility model relates to the technical field of blast furnace smelting, and discloses an oxygen enrichment adjustable coal injection device for blast furnace smelting. The oxygen-enriched-amount-adjustable coal injection device for blast furnace smelting comprises an injection pipe, the top of the injection pipe is movably connected with a pulverized coal tank, the outer side of the bottom of the pulverized coal tank is movably connected with an air outlet pipe, four air outlets are fixedly formed in the periphery of the interior of the air outlet pipe, a connecting pipe is fixedly installed on one side of the air outlet pipe, and the connecting pipe is fixedly connected with the air outlet pipe. And an air blower is fixedly mounted at the top of the connecting pipe. Through operation of the air blower, external air can be fed into the air outlet pipe through the connecting pipe, and the air can be sprayed out along the inner wall of the coal injection pipe through the four air outlets in the periphery of the interior of the air outlet pipe, so that blocked pulverized coal can be impacted, the pulverized coal is dredged, the problem of blockage caused by the pulverized coal is avoided, and the service life of the coal injection pipe is prolonged. The practicability of the device is improved, and the problem that parts are loosened and equipment is damaged due to vibration of the vibrator is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace smelting, and particularly relates to a coal injection device with adjustable oxygen enrichment amount for blast furnace smelting. Background Technique

[0002] During blast furnace smelting, the tuyere of the blast furnace directly sprays the pulverized coal ground by high-pressure air into the blast furnace as fuel and reducing agent, replacing part of the coke, reducing costs, and utilizing ordinary coal. This technology is called the blast furnace coal injection technology. By adopting the technology of mixing high-content oxygen into the blast air, it is the oxygen-enriched injection technology. This technology can increase the blast air temperature, increase the coal injection amount, improve the combustion efficiency and the temperature inside the blast furnace, and shorten the smelting time.

[0003] The existing Chinese utility model patent with the reference publication number of CN217230800U discloses an oxygen-enriched injection device for blast furnace smelting, which includes a blast furnace and an injection pipe arranged on the blast furnace. The injection pipe is a structure with one end blocked and the other end open. The open end of the injection pipe extends into the interior of the blast furnace. An oxygen supply mechanism and a pulverized coal conveying mechanism are sequentially arranged on the injection pipe from the blocked end to the open end direction. The oxygen supply mechanism includes an annular pipe and an oxygen supply pipe communicated with the outside of the annular pipe. A plurality of oxygen injection pipes are evenly distributed on the inner circumference of the annular pipe. The end of the oxygen injection pipe is tangentially communicated with the side wall of the injection pipe. The pulverized coal conveying mechanism includes a pulverized coal tank and a coal dropping pipe arranged at the bottom of the pulverized coal tank. A rotating shaft is arranged on the vertical center line of the pulverized coal tank and the coal dropping pipe. The upper end of the rotating shaft passes through the top of the pulverized coal tank and is drivingly connected with a driving mechanism. A spiral blade is arranged on the rotating shaft in the coal dropping pipe. The oxygen and coal of the utility model are evenly mixed, the ratio is reasonable, and the pulverized coal burns sufficiently, having significant economic value and social value.

[0004] Although the above-mentioned oxygen-enriched injection device for blast furnace smelting solves the problem of sufficient combustion of pulverized coal, the existing coal injection device with adjustable oxygen enrichment amount for blast furnace smelting has poor adjustment effect on the oxygen supply amount, and the effect of dredging by a vibrator is also poor when adding pulverized coal. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a coal injection device with adjustable oxygen enrichment amount for blast furnace smelting, which has the advantages of good anti-blocking effect and convenient oxygen supply adjustment, and solves the above technical problems.

[0007] (2) Technical Solutions

[0008] To achieve the above purpose, the utility model provides the following technical solutions: A coal injection device with adjustable oxygen enrichment amount for blast furnace smelting, including:

[0009] Blowing pipe, the top of the blowing pipe is movably connected with a pulverized coal tank, the outer bottom of the pulverized coal tank is movably connected with an air outlet pipe, the air outlet pipe is in the shape of a "mouth", four air outlet ports are fixedly installed around the inside of the air outlet pipe, a connecting pipe is fixedly installed on one side of the air outlet pipe, a blower is fixedly installed on the top of the connecting pipe, an oxygen delivery pipe is fixedly installed at the bottom of the blowing pipe, the oxygen delivery pipe is in the shape of an "L", a gas metering valve is fixedly installed on the left side of the oxygen delivery pipe, a pressure detection gauge is fixedly installed in the middle of the oxygen delivery pipe, a pressure control valve is fixedly installed on the right side of the oxygen delivery pipe, and an oxygen generator is fixedly installed on one side of the oxygen delivery pipe.

[0010] As a preferred technical solution of the present invention, a coal discharging control device is fixedly installed in the middle of the top of the blowing pipe, and the blowing pipe is a structure for blowing.

[0011] As a preferred technical solution of the present invention, a blowing port is fixedly installed on one side of the coal discharging control device, a blast furnace main body is fixedly installed on one side of the blowing port, and the blowing port is a structure for blowing.

[0012] As a preferred technical solution of the present invention, a blowing device is fixedly installed on the other side of the blowing pipe, and the blowing device is a structure for blowing pulverized coal and oxygen.

[0013] As a preferred technical solution of the present invention, a connecting ring is fixedly installed on the top of the pulverized coal tank, a sealing cover is movably connected to the top of the connecting ring, and the sealing cover is a structure for sealing.

[0014] As a preferred technical solution of the present invention, a support plate is fixedly installed on the inner top of the connecting ring, and a guide plate is fixedly installed on the outer side of the top of the support plate, and the guide plate is a structure for guiding.

[0015] As a preferred technical solution of the present invention, a motor is fixedly installed in the middle of the top of the support plate, a stirring rod is fixedly installed at the bottom of the motor, and the stirring rod is a structure for stirring.

[0016] Compared with the prior art, the present invention provides a coal injection device with adjustable oxygen enrichment for blast furnace smelting, which has the following beneficial effects:

[0017] 1. By the operation of the blower, the present invention can send the outside air into the inside of the air outlet pipe through the connecting pipe, and the gas can be ejected along the inner wall of the coal injection pipe through the four air outlet ports around the inside of the air outlet pipe, so as to impact the blocked pulverized coal, thereby dredging the pulverized coal, avoiding the problem of pulverized coal blockage, improving the practicability of the coal injection device with adjustable oxygen enrichment for blast furnace smelting, and avoiding the problem of loosening of parts and equipment damage caused by the vibration of the vibrator.

[0018] 2. After the oxygen generator of the present utility model generates oxygen, the oxygen is transported through an oxygen delivery pipe. The pressure inside the oxygen delivery pipe can be controlled by a pressure control valve, the oxygen pressure inside the oxygen delivery pipe can be detected by a pressure detection gauge, and the amount of oxygen transported can be controlled by a gas metering valve, which improves the practicability and convenience of the pulverized coal injection device with adjustable oxygen enrichment amount for blast furnace smelting, and avoids the problem that the oxygen supply amount is not easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the injection pipe of the present utility model;

[0021] Figure 3 It is a schematic diagram of the pulverized coal tank of the present utility model;

[0022] Figure 4 It is a schematic diagram of the connecting ring of the present utility model;

[0023] Figure 5 It is a schematic diagram of the oxygen delivery pipe of the present utility model.

[0024] Wherein: 1. Injection pipe; 11. Coal output control device; 12. Injection port; 13. Blast furnace main body; 14. Injection device; 2. Pulverized coal tank; 21. Gas outlet pipe; 22. Gas outlet; 23. Connecting pipe; 24. Blower; 3. Connecting ring; 31. Sealing cover; 32. Support plate; 33. Guide plate; 34. Motor; 35. Stirring rod; 4. Oxygen delivery pipe; 41. Gas metering valve; 42. Pressure detection gauge; 43. Pressure control valve; 44. Oxygen generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0026] In the description of the present utility model, unless otherwise specified, "a plurality" means two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Please refer to Figure 1 - Figure 5 In this embodiment, a coal injection device with adjustable oxygen enrichment for blast furnace smelting includes: a blowing pipe 1, and a coal output control device 11 is fixedly installed in the middle of the top of the blowing pipe 1.

[0029] A blowing port 12 is fixedly installed on one side of the coal output control device 11, and a blast furnace main body 13 is fixedly installed on one side of the blowing port 12.

[0030] A blowing device 14 is fixedly installed on the other side of the blowing pipe 1

[0031] Specifically, the blowing device 14 can be used to blow the pulverized coal inside the blowing pipe 1. The coal output control device 11 can control the coal output, and the pulverized coal can be blown into the interior of the blast furnace main body 13 through the blowing port 12.

[0032] The top of the blowing pipe 1 is movably connected to a pulverized coal tank 2. The outer bottom of the pulverized coal tank 2 is movably connected to an air outlet pipe 21. The air outlet pipe 21 is in the shape of a "mouth". Four air outlet openings 22 are fixedly installed around the interior of the air outlet pipe 21. A connecting pipe 23 is fixedly installed on one side of the air outlet pipe 21, and a blower 24 is fixedly installed on the top of the connecting pipe 23.

[0033] Specifically, through the operation of the blower 24, the outside air can be drawn in and blown into the interior around the pulverized coal tank 2 through the four air outlet openings 22 inside the air outlet pipe 21, thereby pushing the pulverized coal downward to dredge the blockage.

[0034] A connecting ring 3 is fixedly installed on the top of the pulverized coal tank 2, and a sealing cover 31 is movably connected to the top of the connecting ring 3.

[0035] A support plate 32 is fixedly installed at the inner top of the connecting ring 3, and a guide plate 33 is fixedly installed on the outer side of the top of the support plate 32.

[0036] A motor 34 is fixedly installed in the middle of the top of the support plate 32, and a stirring rod 35 is fixedly installed at the bottom of the motor 34.

[0037] Specifically, the guiding plate 33 can guide the fed pulverized coal, and the motor 34 can drive the stirring rod 35 to rotate, thereby dispersing the pulverized coal to avoid clogging, and the support plate 32 supports the motor 34.

[0038] The bottom of the injection pipe 1 is fixedly installed with an oxygen delivery pipe 4. The oxygen delivery pipe 4 is in an "L" shape. A gas metering valve 41 is fixedly installed on the left side of the oxygen delivery pipe 4, a pressure detection gauge 42 is fixedly installed in the middle of the oxygen delivery pipe 4, a pressure control valve 43 is fixedly installed on the right side of the oxygen delivery pipe 4, and an oxygen generator 44 is fixedly installed on one side of the oxygen delivery pipe 4.

[0039] Specifically, the gas metering valve 41 controls the amount of oxygen delivered, the pressure detection gauge 42 detects the pressure of the oxygen delivery pipe 4, the pressure control valve 43 controls the pressure inside the oxygen delivery pipe 4, and the oxygen generator 44 generates oxygen.

[0040] During use, first, open the sealing cover 31, so that pulverized coal can be poured into the inside of the connecting ring 3. The guiding plate 33 inside the connecting ring 3 can guide the pulverized coal to both sides, thereby feeding the pulverized coal into the inside of the pulverized coal tank 2. Through the operation of the motor 34 at the top of the support plate 32, the stirring rod 35 can be driven to rotate, thereby performing a dispersing operation on the accumulated pulverized coal. Through the coal output control device 11, the pulverized coal after being dispersed can be quantitatively input into the inside of the injection pipe 1. Through the operation of the blower 24, the outside air can be drawn in and the gas can be blown out from the four air outlets 22 around the inside of the air outlet pipe 21, so that the gas blows downward along the periphery of the pulverized coal tank 2, thereby driving the pulverized coal to be sent out, improving the anti-clogging effect of the coal injection device with adjustable oxygen enrichment amount for blast furnace smelting. At the same time, it also solves the problem that the vibrator is prone to cause part loosening and equipment damage during dredging, improving the practicability of the coal injection device with adjustable oxygen enrichment amount for blast furnace smelting. Through the operation of the oxygen generator 44, the generated oxygen can be fed into the inside of the oxygen delivery pipe 4. The pressure control valve 43 on one side of the oxygen delivery pipe 4 can control the pressure inside the oxygen delivery pipe 4. The pressure detection gauge 42 can detect the pressure inside the oxygen delivery pipe 4. The gas metering valve 41 can quantitatively control the delivered oxygen, thereby facilitating the adjustment of the oxygen content, improving the practicability of the coal injection device with adjustable oxygen enrichment amount for blast furnace smelting, avoiding the problem that the oxygen content is not easy to control, avoiding affecting the injection effect, and improving the convenience of the coal injection device with adjustable oxygen enrichment amount for blast furnace smelting. Through the injection device 14, the pulverized coal inside the injection pipe 1 can be injected and blown into the inside of the blast furnace main body 13 through the injection port 12.

[0041] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A coal injection device with adjustable oxygen enrichment for blast furnace smelting, characterized in that: The pulverized coal injection device with adjustable oxygen enrichment for blast furnace smelting includes a blowing pipe (1). The top of the blowing pipe (1) is movably connected to a pulverized coal tank (2). The outer bottom of the pulverized coal tank (2) is movably connected to an air outlet pipe (21). The air outlet pipe (21) is in the shape of a "mouth". Four air outlet openings (22) are fixedly installed around the inside of the air outlet pipe (21). A connecting pipe (23) is fixedly installed on one side of the air outlet pipe (21). A blower (24) is fixedly installed at the top of the connecting pipe (23). An oxygen delivery pipe (4) is fixedly installed at the bottom of the blowing pipe (1). The oxygen delivery pipe (4) is in the shape of an "L". A gas metering valve (41) is fixedly installed on the left side of the oxygen delivery pipe (4). A pressure detection gauge (42) is fixedly installed in the middle of the oxygen delivery pipe (4). A pressure control valve (43) is fixedly installed on the right side of the oxygen delivery pipe (4). An oxygen generator (44) is fixedly installed on one side of the oxygen delivery pipe (4).

2. A coal injection device with adjustable oxygen enrichment for blast furnace smelting according to claim 1, characterized in that: A coal discharging control device (11) is fixedly installed in the middle of the top of the blowing pipe (1).

3. A coal injection device with adjustable oxygen enrichment for blast furnace smelting according to claim 2, characterized in that: A blowing port (12) is fixedly installed on one side of the coal discharging control device (11). A blast furnace main body (13) is fixedly installed on one side of the blowing port (12).

4. A coal injection device with adjustable oxygen enrichment for blast furnace smelting according to claim 3, characterized in that: A blowing device (14) is fixedly installed on the other side of the blowing pipe (1).

5. The coal injection device with adjustable oxygen enrichment for blast furnace smelting according to claim 1, characterized in that: A connecting ring (3) is fixedly installed on the top of the pulverized coal tank (2). A sealing cover (31) is movably connected to the top of the connecting ring (3).

6. A coal injection device with adjustable oxygen enrichment for blast furnace smelting according to claim 5, characterized in that: A support plate (32) is fixedly installed at the inner top of the connecting ring (3). A guide plate (33) is fixedly installed on the outer side of the top of the support plate (32).

7. A coal injection device with adjustable oxygen enrichment for blast furnace smelting according to claim 6, characterized in that: A motor (34) is fixedly installed in the middle of the top of the support plate (32). A stirring rod (35) is fixedly installed at the bottom of the motor (34).

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