Low-resistance decomposing furnace coal injection duct structure capable of realizing uniform coal injection

Abstract

The utility model relates to the technical field of cement production, in particular to a low-resistance decomposing furnace coal injection duct structure capable of realizing uniform coal injection. According to the technical scheme, the coal injection duct comprises a coal injection duct body and a disc, a swirler is mounted at the rear end of the coal injection duct body, a lining pipe extends into a first coal injection groove and is fixed, the disc extends into a second coal injection groove, a mounting hole is formed in the front end of the disc, a rotating shaft is rotatably connected to the inner wall of the mounting hole, a flow guide plate is fixed to the rotating shaft, and the flow guide plate is fixed to the disc. The flow guide plate is in threaded connection with a threaded rod, the threaded rod penetrates through the disc, the threaded rod penetrates through the lining pipe and the coal injection duct body, fixing plates are fixed to the upper end and the lower end of the outer wall of the coal injection duct body respectively, supports are inserted into the fixing plates, the inner wall of the groove is rotationally connected with a rotating rod, and the rotating rod is in threaded connection with the threaded rod. The utility model has the advantages that the resistance of the coal injection duct is reduced, the pulverized coal can be uniformly sprayed, and the combustion efficiency of the pulverized coal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, in particular to a pulverized coal injection pipe structure of a low-resistance decomposition furnace capable of realizing uniform pulverized coal injection. Background Technique

[0002] The decomposition furnace in cement production usually refers to the equipment used for calcining raw materials in the cement production process. This equipment is usually called a rotary kiln, and its main function is to decompose and react the raw materials at high temperature to obtain cement clinker.

[0003] When the decomposition furnace is in use, a pulverized coal injection pipe is needed for pulverized coal injection. However, most of the existing pulverized coal injection pipes of the decomposition furnace adopt a straight pipe design in structure. When the pulverized coal is injected into the decomposition furnace, due to the structural limitation of the pulverized coal injection pipe, there are often problems such as uneven mixing of pulverized coal, large resistance of the pulverized coal injection pipe, and high energy consumption. These problems not only affect the combustion efficiency of coal but also increase the energy consumption and cost in the production process. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pulverized coal injection pipe structure of a low-resistance decomposition furnace capable of realizing uniform pulverized coal injection, which has the advantages of reducing the resistance of the pulverized coal injection pipe, making the pulverized coal spraying uniform, and improving the combustion efficiency of the pulverized coal, and solves the problems that most of the existing pulverized coal injection pipes of the decomposition furnace adopt a straight pipe design in structure. When the pulverized coal is injected into the decomposition furnace, due to the structural limitation of the pulverized coal injection pipe, there are often problems such as uneven mixing of pulverized coal, large resistance of the pulverized coal injection pipe, and high energy consumption. These problems not only affect the combustion efficiency of coal but also increase the energy consumption and cost in the production process.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A pulverized coal injection pipe structure of a low-resistance decomposition furnace capable of realizing uniform pulverized coal injection, including a pulverized coal injection pipe body and a disc. A swirler is installed at the rear end of the pulverized coal injection pipe body. A coal injection groove one is opened at the front end of the pulverized coal injection pipe body. A lining pipe extends into the coal injection groove one and is fixed. A coal injection groove two is opened at the front end of the lining pipe. The disc extends into the coal injection groove two. An installation hole is opened at the front end of the disc. One side of the inner wall of the installation hole is rotatably connected to a rotating shaft. A guide plate is fixed on one side of the rotating shaft. One side of the guide plate is threadedly connected to a threaded rod. One side of the threaded rod penetrates through the disc, one side of the threaded rod penetrates through the lining pipe, and one side of the threaded rod penetrates through the pulverized coal injection pipe body. Fixing plates are respectively fixed at the upper and lower ends on one side of the outer wall of the pulverized coal injection pipe body. A bracket is inserted into the fixing plate. A groove is opened at the front end of the bracket. One side of the inner wall of the groove is rotatably connected to a rotating rod. The rotating rod is threadedly connected to the threaded rod.

[0006] Preferably, a control switch box is fixed on the other side of the outer wall of the pulverized coal injection pipe body. A display screen and a button are sequentially embedded and installed on one side of the control switch box from top to bottom. The start and stop of the motor can be controlled through the control switch box.

[0007] Preferably, a first threaded round groove is formed on one side of the deflector plate, and the other side of the threaded rod extends into the first threaded round groove and is threadedly connected. By extending the other side of the threaded rod into the first threaded round groove and threadedly connecting, it is convenient to install and disassemble the threaded rod and the deflector plate, and at the same time, it is convenient to take out the disc.

[0008] Preferably, a second threaded round groove is formed on one side of the rotating rod, and one side of the threaded rod extends into the second threaded round groove and is threadedly connected. By extending one side of the threaded rod into the second threaded round groove and threadedly connecting, it is convenient to install and disassemble the threaded rod and the rotating rod, and at the same time, it drives the deflector plate to rotate.

[0009] Preferably, a third through hole is formed on one side of the outer wall of the disc, a first through hole is formed on one side of the outer wall of the coal injection pipe body, and a second through hole is formed on one side of the outer wall of the inner lining pipe. One side of the threaded rod respectively penetrates through the first through hole, the second through hole and the third through hole. The threaded rod can penetrate through conveniently through the first through hole, the second through hole and the third through hole, which is convenient for connecting the threaded rod and the rotating rod.

[0010] Preferably, a slot is formed on one side of the fixing plate, and one side of the bracket is inserted into the slot. The bracket can be inserted conveniently through the slot, and at the same time, it is convenient to disassemble the bracket.

[0011] Preferably, a round hole is formed on the other side of the bracket, a motor is fixed on the other side of the bracket, one side of the transmission shaft of the motor extends into the round hole, and a rotating rod is fixed on one side of the transmission shaft of the motor. By fixing the rotating rod with the transmission shaft of the motor, power is provided for the rotation of the rotating rod and the deflector plate, so that the angle of the deflector plate can be adjusted, the flow track of the pulverized coal can be changed, and the uniform distribution of the pulverized coal can be realized.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] In the present utility model, a swirler is installed at the rear end of the coal injection pipe body, a second coal injection groove is formed at the front end of the inner lining pipe, the disc extends into the second coal injection groove, a rotating shaft is rotatably connected to one side of the inner wall of the mounting hole, a deflector plate is fixed on one side of the rotating shaft, one side of the deflector plate is threadedly connected to a threaded rod, one side of the threaded rod penetrates through the disc, one side of the threaded rod penetrates through the inner lining pipe, one side of the threaded rod penetrates through the coal injection pipe body, fixing plates are respectively fixed at the upper and lower ends on one side of the outer wall of the coal injection pipe body, a bracket is inserted into the fixing plates, a groove is formed at the front end of the bracket, a rotating rod is rotatably connected to one side of the inner wall of the groove, the rotating rod is threadedly connected to the threaded rod. When coal needs to be injected into the decomposition furnace, the threaded rod is extended into the first threaded round groove and threadedly connected, the threaded rod is extended into the second threaded round groove and threadedly connected, and the motor is started, so that the rotating rod, the threaded rod and the deflector plate can rotate as required. The pulverized coal is deflected by the deflector plate, then enters the swirler, and finally is sprayed into the decomposition furnace, achieving the effects of reducing the resistance of the coal injection pipe, making the pulverized coal sprayed evenly, and improving the combustion efficiency of the pulverized coal. Brief Description of the Drawings

[0014] Figure 1 This is the front view structural schematic diagram of the present utility model;

[0015] Figure 2 This is the front view structural schematic diagram of the pulverized coal injection pipe of the present utility model;

[0016] Figure 3 This is the front view structural schematic diagram of the inner lining pipe of the present utility model;

[0017] Figure 4 This is the sectional view structural schematic diagram of the disc of the present utility model;

[0018] Figure 5 This is the sectional view structural schematic diagram of the rotating rod of the present utility model;

[0019] Figure 6 This is the sectional view structural schematic diagram of the bracket of the present utility model;

[0020] Figure 7 This is the front view structural schematic diagram of the cyclone of the present utility model.

[0021] In the figure: 1. Cyclone; 2. Pulverized coal injection pipe body; 3. First through hole; 4. First pulverized coal injection groove; 5. Control switch box; 6. Inner lining pipe; 7. Second through hole; 8. Second pulverized coal injection groove; 9. Disc; 10. Rotating shaft; 11. Mounting hole; 12. Deflector; 13. Third through hole; 14. First threaded round groove; 15. Threaded rod; 16. Second threaded round groove; 17. Rotating rod; 18. Fixed plate; 19. Bracket; 20. Motor; 21. Round hole; 22. Groove; 23. Slot. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 7, an embodiment provided by the present utility model: a pulverized coal injection pipe structure of a low-resistance decomposition furnace capable of realizing uniform pulverized coal injection, including a pulverized coal injection pipe body 2 and a disc 9. A cyclone 1 is installed at the rear end of the pulverized coal injection pipe body 2. On the other side of the outer wall of the pulverized coal injection pipe body 2, a control switch box 5 is fixed. On one side of the control switch box 5, a display screen and buttons are sequentially embedded from top to bottom. The start and stop of the motor 20 can be controlled through the control switch box 5. A plurality of swirl vanes are arranged inside the cyclone 1. Through the rotating action of the swirl vanes, the pulverized coal can form a swirling airflow when injected into the decomposition furnace, further improving the mixing effect of the pulverized coal. A coal injection groove 1 is opened at the front end of the pulverized coal injection pipe body 2. A lining pipe 6 extends into the coal injection groove 1 and is fixed. A coal injection groove 2 is opened at the front end of the lining pipe 6. The lining pipe 6 is made of wear-resistant ceramic material, and the wear-resistant ceramic material can reduce the wear of the pipe wall surface by particles such as coal ash, thereby reducing the frictional resistance.

[0024] The disc 9 extends into the coal injection groove 2. An installation hole 11 is opened at the front end of the disc 9. One side of the inner wall of the installation hole 11 is rotatably connected to a rotating shaft 10. A guide vane 12 is fixed on one side of the rotating shaft 10. A threaded rod 15 is threadedly connected to one side of the guide vane 12. A threaded circular groove 1 is opened on one side of the guide vane 12. The other side of the threaded rod 15 extends into the threaded circular groove 1 and is threadedly connected. By extending the other side of the threaded rod 15 into the threaded circular groove 1 and being threadedly connected, it is convenient to install and disassemble the threaded rod 15 and the guide vane 12, and at the same time, it is convenient to take out the disc 9. One side of the threaded rod 15 penetrates through the disc 9, one side of the threaded rod 15 penetrates through the lining pipe 6, and one side of the threaded rod 15 penetrates through the pulverized coal injection pipe body 2. A through hole 3 is opened on one side of the outer wall of the disc 9, a through hole 1 is opened on one side of the outer wall of the pulverized coal injection pipe body 2, and a through hole 2 is opened on one side of the outer wall of the lining pipe 6. One side of the threaded rod 15 penetrates through the through hole 1, the through hole 2, and the through hole 3 respectively. Through the through hole 1, the through hole 2, and the through hole 3, it is convenient for the threaded rod 15 to penetrate, and it is convenient to connect the threaded rod 15 with the rotating rod 17.

[0025] On both the upper and lower ends of one side of the outer wall of the main body 2 of the pulverized coal injection pipe, fixing plates 18 are respectively fixed. A support 19 is inserted into the fixing plate 18. A slot 23 is formed on one side of the fixing plate 18. One side of the support 19 is inserted into the slot 23. Through the slot 23, it is convenient for the support 19 to be inserted and at the same time convenient for the support 19 to be disassembled. A groove 22 is formed at the front end of the support 19. One side of the inner wall of the groove 22 is rotatably connected to a rotating rod 17. A circular hole 21 is formed on the other side of the support 19. A motor 20 is fixed on the other side of the support 19. One side of the transmission shaft of the motor 20 extends into the circular hole 21. One side of the transmission shaft of the motor 20 is fixed with a rotating rod 17. By fixing the rotating rod 17 through the transmission shaft of the motor 20, power is provided for the rotation of the rotating rod 17 and the deflector 12, so that the angle of the deflector 12 can be adjusted, the flow track of the pulverized coal can be changed, and the uniform distribution of the pulverized coal can be realized. The rotating rod 17 is threadedly connected to the threaded rod 15. A second threaded circular groove 16 is formed on one side of the rotating rod 17. One side of the threaded rod 15 extends into the second threaded circular groove 16 and is threadedly connected. By extending one side of the threaded rod 15 into the second threaded circular groove 16 and being threadedly connected, it is convenient for the installation and disassembly of the threaded rod 15 and the rotating rod 17, and at the same time drives the deflector 12 to rotate.

[0026] When it is necessary to inject pulverized coal into the decomposition furnace, the threaded rod 15 is passed through the first through hole 3, the second through hole 7 and the third through hole 13 and extends into the first threaded circular groove 14 and is threadedly connected. Then the support 19 is inserted into the slot 23. The threaded rod 15 extends into the second threaded circular groove 16 and is threadedly connected. The operation control switch box 5 is controlled so that the rotating rod 17, the threaded rod 15 and the deflector 12 can be rotated and adjusted according to needs. The pulverized coal is guided into the second pulverized coal injection groove 8, deflected by the deflector 12, then enters the cyclone 1, and finally is sprayed into the decomposition furnace for combustion. The effect of reducing the resistance of the pulverized coal injection pipe and at the same time making the pulverized coal spraying uniform and improving the combustion efficiency of the pulverized coal is achieved.

[0027] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A pulverized coal injection pipe structure for a low-resistance precalciner capable of achieving uniform pulverized coal injection, comprising a pulverized coal injection pipe body (2) and a disc (9), characterized in that: A swirler (1) is installed at the rear end of the pulverized coal injection pipe body (2). A first pulverized coal injection groove (4) is formed at the front end of the pulverized coal injection pipe body (2). A lining pipe (6) extends into and is fixed in the first pulverized coal injection groove (4). A second pulverized coal injection groove (8) is formed at the front end of the lining pipe (6). A disc (9) extends into the second pulverized coal injection groove (8). An installation hole (11) is formed at the front end of the disc (9). One side of the inner wall of the installation hole (11) is rotatably connected to a rotating shaft (10). A guide vane (12) is fixed to one side of the rotating shaft (10). A threaded rod (15) is threadedly connected to one side of the guide vane (12). One side of the threaded rod (15) penetrates through the disc (9). One side of the threaded rod (15) penetrates through the lining pipe (6). One side of the threaded rod (15) penetrates through the pulverized coal injection pipe body (2). Fixing plates (18) are respectively fixed to the upper and lower ends of one side of the outer wall of the pulverized coal injection pipe body (2). A bracket (19) is inserted into the fixing plates (18). A groove (22) is formed at the front end of the bracket (19). One side of the inner wall of the groove (22) is rotatably connected to a rotating rod (17). The rotating rod (17) is threadedly connected to the threaded rod (15).

2. The structure of the pulverized coal injection pipe for a low-resistance precalciner capable of achieving uniform pulverized coal injection according to claim 1, wherein: A control switch box (5) is fixed to the other side of the outer wall of the pulverized coal injection pipe body (2). A display screen and buttons are sequentially embedded and installed on one side of the control switch box (5) from top to bottom.

3. The structure of the pulverized coal injection pipe for a low-resistance precalciner capable of achieving uniform pulverized coal injection according to claim 1, characterized in that: A first threaded circular groove (14) is formed on one side of the guide vane (12). The other side of the threaded rod (15) extends into the first threaded circular groove (14) and is threadedly connected.

4. A pulverized coal injection pipe structure for a low-resistance decomposition furnace capable of achieving uniform pulverized coal injection according to claim 3, characterized in that: A second threaded circular groove (16) is formed on one side of the rotating rod (17). The one side of the threaded rod (15) extends into the second threaded circular groove (16) and is threadedly connected.

5. The structure of the pulverized coal injection pipe for a low-resistance precalciner capable of achieving uniform pulverized coal injection according to claim 1, characterized in that: A third through hole (13) is formed on one side of the outer wall of the disc (9). A first through hole (3) is formed on one side of the outer wall of the pulverized coal injection pipe body (2). A second through hole (7) is formed on one side of the outer wall of the lining pipe (6). One side of the threaded rod (15) respectively penetrates through the first through hole (3), the second through hole (7) and the third through hole (13).

6. The structure of the pulverized coal injection pipe for a low-resistance decomposition furnace capable of achieving uniform pulverized coal injection according to claim 1, characterized in that: A slot (23) is formed on one side of the fixing plate (18). One side of the bracket (19) is inserted into the slot (23).

7. A pulverized coal injection pipe structure for a low-resistance precalciner capable of achieving uniform pulverized coal injection according to claim 6, characterized in that: A circular hole (21) is formed on the other side of the bracket (19). A motor (20) is fixed to the other side of the bracket (19). One side of the transmission shaft of the motor (20) extends into the circular hole (21). One side of the transmission shaft of the motor (20) is fixed to the rotating rod (17).

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