Blast furnace coal injection device

Abstract

The utility model relates to the technical field of blast furnace coal injection, in particular to a blast furnace coal injection device which comprises a material conveying pipe, an auger body is rotatably installed in the material conveying pipe, reserved holes are formed in the outer wall of the material conveying pipe in an annular array mode, one side of the lower end face of the material conveying pipe is provided with a hole and is communicated with a material discharging pipe, and the material conveying pipe further comprises a material discharging pipe, a ring pipe and a pressurizing air pump body; the annular pipe sleeves the outer side of the conveying pipe; the inner side of the annular pipe is provided with a hole and communicated with an air guide pipe. The end, away from the annular pipe, of the air guide pipe communicates with the inner side of the conveying pipe through the preformed hole. The air guide pipe and the outer wall of the conveying pipe form an oblique angle of 45 degrees; the pressurizing air pump body is arranged on the upper end face of the conveying pipe. Wherein the pressurizing air pump body is communicated with the annular pipe through the communicating pipe. The problems that the coal injection efficiency is affected and the coal injection speed is low due to the fact that the spray pipe is blocked are solved.

Description

Technical Field

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

[0002] The pulverized coal injection device of the blast furnace mixes pulverized coal with air and sprays it into the furnace chamber of the blast furnace. It generates high-temperature combustion gas through combustion to provide heat energy for the blast furnace. The heat energy generated by the combustion of pulverized coal can reduce iron ore to metallic iron and complete the iron smelting process. By adjusting the injection amount and position of pulverized coal, the gas flow and slag formation in the blast furnace can be adjusted, thereby controlling the operating conditions and smelting process of the blast furnace. The injection of pulverized coal can change the temperature distribution and gas flow rate in the blast furnace and effectively control the reaction. The injection of pulverized coal can make the temperature distribution inside the blast furnace more uniform, avoid excessively high or low local temperatures, and improve smelting efficiency and product quality. Compared with traditional coke combustion, the use of pulverized coal for combustion can reduce fuel costs and reduce dependence on coke resources, thereby achieving energy conservation and resource utilization. In short, the pulverized coal injection device of the blast furnace provides heat energy, adjusts operating conditions and improves the temperature distribution in the furnace through the combustion of pulverized coal and gas injection, so as to achieve normal smelting and efficient operation of the blast furnace.

[0003] During coal injection operation, if the coal powder becomes damp, it is easy to cause blockage in the nozzle, thereby affecting the coal injection efficiency. At the same time, when the pressure of coal powder is insufficient during transportation, the coal powder injection speed will also be affected. Therefore, a blast furnace coal injection device is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a blast furnace coal injection device, which has the advantages of improving the coal powder conveying force and increasing the coal injection speed, and solves the problem that the coal injection efficiency is affected and the coal injection speed is slow due to nozzle blockage.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a blast furnace coal injection device, comprising a feed pipe, a auger body is rotatably installed in the feed pipe, the outer wall of the feed pipe is provided with reserved holes in a ring array, a hole is opened on one side of the lower end surface of the feed pipe and connected with a discharge pipe, and also includes a ring pipe and a booster air pump body;

[0006] The ring pipe is sleeved on the outside of the conveying pipe;

[0007] The inner side of the ring tube has a hole and is connected to an air guide tube;

[0008] The end of the air guide tube away from the ring tube is connected and installed with the inner side of the feed pipe through a reserved hole;

[0009] Among them, the air guide pipe and the outer wall of the material conveying pipe are at an angle of forty-five degrees;

[0010] The booster air pump body is arranged on the upper end surface of the conveying pipe;

[0011] Wherein, the booster air pump body is connected and installed with the ring pipe through a connecting pipe.

[0012] When using a blast furnace coal injection device in the present technical solution, the booster air pump body provides high-pressure gas to the annular pipe through the connecting pipe, and the high-pressure gas enters the feed pipe through the air duct and mixes with the coal powder. The coal powder is accelerated in the feed pipe by the high-pressure gas, and the conveying speed of the coal powder is increased by the rotation of the auger body, and the blockage of the coal powder in the feed pipe is avoided. The coal powder is ejected through the discharge pipe. In this process, the coal powder ejection speed is increased with the help of the annular pipe and the air duct installed at an angle.

[0013] Preferably, a feed end is fixedly mounted on one end of the feed pipe via a flange, a limit frame is fixedly mounted on the inner side of the feed end, a sealing cover is fixedly mounted on the other end of the feed pipe via a flange, and a mounting frame is fixedly mounted on the outer side of the feed pipe.

[0014] Preferably, a driving motor body is fixedly mounted on one end of the sealing cover away from the feeding pipe.

[0015] The driving motor body is fixedly installed on the end of the sealing cover away from the feeding pipe, so that the auger body can be rotated in the feeding pipe through the transmission installation of the driving motor body and the auger body, thereby improving the conveying force of coal powder and avoiding blockage in the feeding pipe.

[0016] Preferably, one end of the auger body passes through the sealing cover and is transmission-mounted with the driving motor body, and the other end of the auger body is rotationally connected with the limiting frame.

[0017] The other end of the auger body is rotatably connected to the limit frame, so that the rotation of the auger body in the material conveying pipe is more stable.

[0018] Preferably, the booster air pump body is fixedly mounted on the top of the mounting frame, and a one-way valve is provided at the exhaust end of the booster air pump body.

[0019] The booster air pump body is fixedly mounted on the top of the mounting frame, and a one-way valve is provided at the exhaust end of the booster air pump body, thereby preventing the backflow of coal powder when the booster air pump body is not started.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] The utility model provides an annular tube and a booster air pump body, and sleeves the annular tube on the outside of the feeding pipe, opens a hole on the inner side of the annular tube and connects and installs an air guide pipe, connects and installs the end of the air guide pipe away from the annular tube through the reserved hole and the inner side of the feeding pipe, and makes the air guide pipe and the outer wall of the feeding pipe form an oblique angle of forty-five degrees, arranges the booster air pump body on the upper end face of the feeding pipe, and connects and installs the booster air pump body with the annular tube through the connecting pipe, and when performing specific operations, the booster air pump body provides high-pressure gas to the annular tube through the connecting pipe, and the high-pressure gas enters the feeding pipe through the air guide pipe and mixes with the coal powder, the coal powder is accelerated in the feeding pipe by the high-pressure gas, and the conveying speed of the coal powder is increased by the rotation of the auger body, and the blockage of the coal powder in the feeding pipe is avoided, and the coal powder is sprayed out through the discharge pipe. In this process, with the help of the annular tube and the air guide pipe installed at an oblique angle, the coal powder spraying speed is increased, thereby achieving the effect of increasing the coal powder conveying force and increasing the coal spraying speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 3 For the utility model Figure 2 The structural diagram of the enlarged part in the middle;

[0025] Figure 4 This is a schematic diagram of the annular tube structure of the utility model.

[0026] In the figure: 1. Feed end; 2. Ring pipe; 3. Connecting pipe; 4. Booster air pump body; 5. Sealing cover; 6. Drive motor body; 7. Discharge pipe; 8. Mounting frame; 9. Feed pipe; 10. Auger body; 11. Limiting frame; 12. Air guide pipe. DETAILED DESCRIPTION

[0027] 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.

[0028] Example

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the utility model provides an embodiment: a blast furnace coal injection device, including a feed pipe 9, a auger body 10 is rotatably installed in the feed pipe 9, the outer wall of the feed pipe 9 is provided with reserved holes in a ring array, a hole is opened on one side of the lower end surface of the feed pipe 9 and connected to a discharge pipe 7, and also includes a ring pipe 2 and a booster air pump body 4;

[0030] Specifically,

[0031] The ring tube 2 is sleeved on the outside of the material delivery tube 9;

[0032] The inner side of the ring tube 2 has a hole and is connected to an air guide tube 12;

[0033] The end of the air guide tube 12 away from the ring tube 2 is connected to the inner side of the feed pipe 9 through a reserved hole;

[0034] The air guide pipe 12 and the outer wall of the feed pipe 9 are at a 45-degree angle;

[0035] The booster air pump body 4 is arranged on the upper end surface of the feed pipe 9;

[0036] The booster air pump body 4 is connected and installed with the ring pipe 2 through the connecting pipe 3.

[0037] By setting the annular tube 2 and the booster air pump body 4, and sleeve the annular tube 2 on the outside of the feeding pipe 9, opening a hole on the inside of the annular tube 2 and connecting and installing an air guide tube 12, the end of the air guide tube 12 away from the annular tube 2 is connected and installed with the inside of the feeding pipe 9 through the reserved hole, and the air guide tube 12 is connected and installed with the outer wall of the feeding pipe 9 at a 45-degree angle, by setting the booster air pump body 4 on the upper end surface of the feeding pipe 9, and connecting the booster air pump body 4 with the annular tube 2 through the connecting pipe 3, when performing specific operations, the booster air pump body 4 is connected to the annular tube 2 through the connecting pipe 3. The through pipe 3 provides high-pressure gas to the annular pipe 2, and the high-pressure gas enters the conveying pipe 9 through the air guide pipe 12 and mixes with the coal powder. The coal powder is accelerated in the conveying pipe 9 by the high-pressure gas, and the conveying speed of the coal powder is increased by the rotation of the auger body 10, and the blockage of the coal powder in the conveying pipe 9 is avoided. The coal powder is sprayed out through the discharge pipe 7. In this process, with the help of the annular pipe 2 and the air guide pipe 12 installed at an angle, the coal powder spraying speed is improved, thereby achieving the effect of increasing the coal powder conveying force and increasing the coal spraying speed.

[0038] Furthermore, a feed end 1 is fixedly installed at one end of the feed pipe 9 through a flange, a limit frame 11 is fixedly installed inside the feed end 1, a sealing cover 5 is fixedly installed at the other end of the feed pipe 9 through a flange, and a mounting frame 8 is fixedly installed outside the feed pipe 9.

[0039] Furthermore, a driving motor body 6 is fixedly mounted on one end of the sealing cover 5 away from the material conveying pipe 9 .

[0040] By fixing a driving motor body 6 on the end of the sealing cover 5 away from the feed pipe 9, the drive motor body 6 and the auger body 10 are installed in a transmission manner, so that the auger body 10 rotates in the feed pipe 8, thereby increasing the conveying force of the coal powder and avoiding blockage in the feed pipe 9.

[0041] Furthermore, one end of the auger body 10 passes through the sealing cover 5 and is transmission-mounted with the driving motor body 6 , and the other end of the auger body 10 is rotationally connected with the limiting frame 11 .

[0042] By rotatably connecting the other end of the auger body 10 to the limiting frame 11 , the rotation of the auger body 10 in the feed pipe 9 is made more stable.

[0043] Furthermore, the booster air pump body 4 is fixedly mounted on the top of the mounting frame 8 , and a one-way valve is provided at the exhaust end of the booster air pump body 4 .

[0044] The booster air pump body 4 is fixedly mounted on the top of the mounting frame 8 and a one-way valve is provided at the exhaust end of the booster air pump body 4, thereby preventing the backflow of coal powder when the booster air pump body 4 is not started.

[0045] When the utility model is used, the booster air pump body 4 provides high-pressure gas to the annular tube 2 through the connecting tube 3, and the high-pressure gas enters the delivery pipe 9 through the air guide pipe 12 and mixes with the coal powder. The coal powder is accelerated in the delivery pipe 9 by the high-pressure gas, and the conveying speed of the coal powder is increased by the rotation of the auger body 10, and the blockage of the coal powder in the delivery pipe 9 is avoided. The coal powder is sprayed out through the discharge pipe 7. In this process, the coal powder spraying speed is increased with the help of the annular tube 2 and the air guide pipe 12 installed at an angle.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A blast furnace coal injection device, comprising a feed pipe (9), a auger body (10) is rotatably installed in the feed pipe (9), the outer wall of the feed pipe (9) is provided with reserved holes in a ring array, a hole is opened on one side of the lower end surface of the feed pipe (9) and connected to a discharge pipe (7), characterized in that: Also includes: The ring tube (2) is sleeved on the outside of the material conveying tube (9); The inner side of the ring tube (2) has a hole and is connected to an air guide tube (12). The end of the air guide tube (12) facing away from the ring tube (2) is connected to the inner side of the material delivery tube (9) through a reserved hole; The air guide pipe (12) and the outer wall of the material delivery pipe (9) are at an angle of 45 degrees; A booster air pump body (4) is arranged on the upper end surface of the material delivery pipe (9); The booster air pump body (4) is connected and installed with the ring pipe (2) via a connecting pipe (3).

2. A blast furnace coal injection device according to claim 1, characterized in that: A feed end (1) is fixedly mounted on one end of the feed pipe (9) via a flange, a limit frame (11) is fixedly mounted on the inner side of the feed end (1), a sealing cover (5) is fixedly mounted on the other end of the feed pipe (9) via a flange, and a mounting frame (8) is fixedly mounted on the outer side of the feed pipe (9).

3. A blast furnace coal injection device according to claim 2, characterized in that: A driving motor body (6) is fixedly mounted on one end of the sealing cover (5) which is away from the material conveying pipe (9).

4. A blast furnace coal injection device according to claim 1, characterized in that: One end of the auger body (10) passes through the sealing cover (5) and is transmission-mounted with the driving motor body (6), and the other end of the auger body (10) is rotationally connected with the limiting frame (11).

5. A blast furnace coal injection device according to claim 1, characterized in that: The booster air pump body (4) is fixedly mounted on the top of the mounting frame (8), and a one-way valve is provided at the exhaust end of the booster air pump body (4).

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