Hydrogen and pulverized coal composite burner

Abstract

The utility model discloses a hydrogen and pulverized coal composite burner which comprises a conveying pipe, one side of the conveying pipe is connected with a protection device, the protection device comprises a one-way pipe, a threaded plate, a sealing plate, a movable plate and a push spring, the threaded plate is connected with the one-way pipe through threads, the sealing plate is arranged in the one-way pipe, the movable plate is arranged on one side of the sealing plate, and the push spring is arranged on the other side of the sealing plate. The push spring is connected to one side of the movable plate, an adjusting mechanism is arranged in the one-way pipe and comprises a sliding plate, a threaded sleeve, a threaded rod, an elastic plate, a hexagonal rod, an edge block and an edge groove, the sliding plate is arranged in the one-way pipe, the threaded sleeve is arranged on the inner side of the sliding plate, the threaded rod is connected to one side of the sealing plate, and the two ends of the elastic plate are connected with the sliding plate and the inner wall of the one-way pipe correspondingly; the edge block is connected to one end of the screw, the edge groove is formed in the inner side of the threaded plate, the hexagonal rod is connected to one side of the sealing plate, and one end of the conveying pipe is connected with a conveying device. The performance of the hydrogen and pulverized coal composite burner is improved, and the requirements of industrial production for efficient and clean burning are met.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen pulverized coal composite burners, and more specifically, it relates to a hydrogen pulverized coal composite burner. Background Technique

[0002] In the existing industrial combustion technology, the hydrogen pulverized coal composite burner is an innovative combustion device aiming to improve combustion efficiency and reduce environmental pollution. However, in traditional pulverized coal burners, due to the excessive central wind speed, pulverized coal often cannot burn rapidly, resulting in the occurrence of flame delay phenomenon. This phenomenon not only reduces the combustion efficiency but also may cause furnace coking, affecting the normal operation and service life of the equipment.

[0003] To solve this problem, some technical solutions install a hydrogen injection gas pipe in the center of the original pulverized coal burner. However, this improved solution also has certain limitations. Due to the relatively simple structure of the hydrogen injection gas pipe and the lack of a reasonable protection device, it may cause the occurrence of flame backflow. Flame backflow refers to the reverse flow of the flame into the hydrogen injection pipeline during the combustion process, which not only affects the normal operation of the burner but also may cause damage to the equipment and even lead to safety accidents.

[0004] To prevent flame backflow, some devices adopt simple protection devices. This kind of device can prevent flame backflow to a certain extent, but its structure is simple and lacks a flexible opening mechanism. It cannot adjust the opening pressure value of the protection device according to actual needs. In addition, this device cannot accurately control the amount of hydrogen entering each time after opening, which may lead to insufficient or excessive hydrogen supply, affecting the combustion efficiency and safety. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the problems existing in the prior art, the utility model provides a hydrogen pulverized coal composite burner to solve the technical problems mentioned in the background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present utility model provides the following technical solution: A hydrogen pulverized coal composite burner, including a conveying pipe, characterized in that: a protective device is connected to one side of the conveying pipe, and the protective device includes a one-way pipe, a threaded plate, a sealing plate, a movable plate and a pushing spring. The one-way pipe is connected to one side of the conveying pipe. The threaded plate is movably connected to the inner wall of the one-way pipe through threads. The sealing plate is movably arranged in the one-way pipe. The movable plate is movably arranged on one side of the sealing plate. The pushing spring is connected to one side of the movable plate, and the other end of the pushing spring is movably connected to the threaded plate. An adjusting mechanism is arranged in the one-way pipe, and the adjusting mechanism includes a sliding plate, a screw sleeve, a screw rod, an elastic plate, a hexagonal rod, a prism block and a prism groove. The sliding plate is movably arranged in the one-way pipe. The screw sleeve is arranged inside the sliding plate. The screw rod is connected to one side of the sealing plate, and the screw rod is movably connected to the screw sleeve through threads. Both ends of the elastic plate are connected to the sliding plate and the inner wall of the one-way pipe respectively. The prism block is connected to one end of the screw rod. The prism groove is opened on the inner side of the threaded plate, and the prism groove is adapted to the prism block. The hexagonal rod is connected to one side of the sealing plate. One end of the conveying pipe is connected with a conveying device.

[0009] The present utility model is further arranged such that a control sleeve is provided on one side of the one-way pipe. A connecting frame is provided inside the control sleeve. An adjusting rod is provided on one side of the connecting frame. A hexagonal groove is opened at one end of the adjusting rod, and the hexagonal groove is adapted to the hexagonal rod.

[0010] The present utility model is further arranged such that bellows are symmetrically provided on both sides of the control sleeve. Both ends of the control sleeve are movably connected to the two bellows respectively.

[0011] The present utility model is further arranged such that a sealing ring is provided on one side of the sealing plate. A sealing groove is opened in the one-way pipe, and the sealing groove is adapted to the sealing ring. The setting of the sealing groove and the sealing ring improves the sealing performance of the one-way pipe.

[0012] The present utility model is further arranged such that a sliding groove is opened in the one-way pipe. A sliding block is provided on the outer side of the sliding plate, and the sliding block is slidably arranged in the sliding groove. The setting of the sliding groove and the sliding block realizes the guiding and limiting functions for the sliding plate.

[0013] The present utility model is further arranged such that the conveying device includes a main flow pipe, a shunt pipe and a connecting pipe. The main flow pipe is installed in the conveying pipe, and the input end of the main flow pipe is connected to the one-way pipe. A plurality of the shunt pipes are connected to the output end of the main flow pipe. The connecting pipe is connected to the input end of the corresponding bellows. The setting of the conveying device optimizes the traditional structure and solves the problem of incomplete combustion.

[0014] The present utility model is further arranged such that a feeder is provided at the input end of the conveying pipe. The setting of the feeder facilitates the input of pulverized coal.

[0015] The present utility model is further configured such that a feed hopper is provided on one side of the feeder, and the output end of the feed hopper is connected to the input end of the feeder.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present utility model provides a hydrogen pulverized coal composite burner, which has the following beneficial effects:

[0018] 1. The beneficial effect of the conveying device is that it can effectively transport hydrogen into the burner and evenly distribute hydrogen to different areas of the burner through the shunt pipe. The settings of the main pipe and the shunt pipe ensure that hydrogen can be quickly and evenly distributed, thereby improving the combustion efficiency.

[0019] 2. The beneficial effect of the protection device is that it can prevent the backflow of flames and pulverized coal, ensuring the safe operation of the burner. The design of the one-way pipe and the sealing plate can effectively seal the hydrogen pipeline, preventing the reverse flow of flames and pulverized coal. The settings of the sealing ring and the sealing groove further enhance the sealing performance. In addition, the cooperation of the movable plate and the push spring can flexibly control the opening and closing of the sealing plate to adapt to different working conditions.

[0020] 3. The beneficial effect of the adjustment mechanism is that it can flexibly control the conveying speed of hydrogen and the opening pressure of the sealing plate. Through the linkage of components such as the control sleeve, the adjustment rod, and the screw rod, the position of the sliding plate can be precisely adjusted, thereby changing the gap between the elastic plates, and further adjusting the passing speed of hydrogen. This design enables users to adjust the flow rate of hydrogen according to actual needs to achieve the best combustion effect. At the same time, the design of components such as the threaded plate and the prism block can precisely control the opening pressure of the sealing plate, ensuring the stability and safety of the burner under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of a hydrogen pulverized coal composite burner in the present utility model;

[0022] Figure 2 is a sectional structure schematic diagram of the main pipe and the conveying pipe part in the present utility model;

[0023] Figure 3 is a sectional structure schematic diagram of the protection device and the adjustment mechanism part in the present utility model;

[0024] Figure 4 is a sectional structure schematic diagram of the one-way pipe part in the present utility model;

[0025] Figure 5 is a structure schematic diagram of the one-way pipe part in the present utility model.

[0026] In the figure: 1, conveying pipe; 2, one-way pipe; 3, threaded plate; 4, sealing plate; 5, movable plate; 6, push spring; 7, sliding plate; 8, screw sleeve; 9, screw rod; 10, elastic plate; 11, prism block; 12, prism groove; 13, control sleeve; 14, connecting frame; 15, adjusting rod; 16, hexagonal groove; 17, bellows; 18, sealing ring; 19, sealing groove; 20, chute; 21, slider; 22, main flow pipe; 23, shunt pipe; 24, connecting pipe; 25, feeder; 26, feed hopper; 40, hexagonal rod. Detailed implementation mode

[0027] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe the present invention in detail with reference to the drawings and in combination with the embodiments.

[0028] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise stated, the orientations such as "upper and lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left and right" are usually the left and right shown in the drawings; "inside and outside" refer to the inside and outside relative to the contours of the respective components, but the above orientation terms are not used to limit the present invention.

[0030] Please refer to Figures 1-5 , a hydrogen pulverized coal composite burner, including a conveying pipe 1, characterized in that: a protection device is connected to one side of the conveying pipe 1, and the protection device includes a one-way pipe 2, a threaded plate 3, a sealing plate 4, a movable plate 5 and a push spring 6. The one-way pipe 2 is connected to one side of the conveying pipe 1. The threaded plate 3 is movably connected to the inner wall of the one-way pipe 2 through threads. The sealing plate 4 is movably arranged in the one-way pipe 2. The movable plate 5 is movably arranged on one side of the sealing plate 4. The push spring 6 is connected to one side of the movable plate 5, and the other end of the push spring 6 is movably connected to the threaded plate 3. An adjusting mechanism is arranged in the one-way pipe 2. The adjusting mechanism includes a sliding plate 7, a screw sleeve 8, a screw rod 9, an elastic plate 10, a hexagonal rod 40, a prism block 11 and a prism groove 12. The sliding plate 7 is movably arranged in the one-way pipe 2. The screw sleeve 8 is arranged inside the sliding plate 7. The screw rod 9 is connected to one side of the sealing plate 4, and the screw rod 9 is movably connected to the screw sleeve 8 through threads. Both ends of the elastic plate 10 are connected to the sliding plate 7 and the inner wall of the one-way pipe 2 respectively. The prism block 11 is connected to one end of the screw rod 9. The prism groove 12 is opened on the inner side of the threaded plate 3, and the prism groove 12 is adapted to the prism block 11. The hexagonal rod 40 is connected to one side of the sealing plate 4. One end of the conveying pipe 1 is connected to a conveying device.

[0031] One side of the one-way pipe 2 is provided with a control sleeve 13. Inside the control sleeve 13, there is a connecting frame 14. One side of the connecting frame 14 is provided with an adjusting rod 15. One end of the adjusting rod 15 is provided with a hexagonal groove 16, and the hexagonal groove 16 is adapted to the hexagonal rod 40.

[0032] On both sides of the control sleeve 13, bellows 17 are symmetrically arranged. The two ends of the control sleeve 13 are respectively and movably connected to the two bellows 17.

[0033] One side of the sealing plate 4 is provided with a sealing ring 18. A sealing groove 19 is formed in the one-way pipe 2, and the sealing groove 19 is adapted to the sealing ring 18.

[0034] A sliding groove 20 is formed in the one-way pipe 2. The outer side of the sliding plate 7 is provided with a slider 21, and the slider 21 is slidably arranged in the sliding groove 20.

[0035] In this embodiment, when the device needs to be used, the opening mechanism of the protective device and the conveying speed of hydrogen can be adjusted according to the usage requirements. First, by pushing the control sleeve 13 to one side, the bellows 17 provided on one side will be driven by the control sleeve 13 to elongate and compress the bellows 17 provided on one side. Then, the control sleeve 13 will drive the adjusting rod 15 to move through the connecting frame 14. Then, the adjusting rod 15 will push the sealing plate 4 to move. Then, the sealing plate 4 will drive the screw rod 9 and the prism block 11 to move. Then, the screw rod 9 will drive the sliding plate 7 to move through the thread. Then, the movable plate 5 and the threaded plate 3 will cooperate to squeeze the push spring 6. At the same time, the prism block 11 will enter the prism groove 12. Then, rotate the control sleeve 13. Then, the control sleeve 13 will drive the sealing plate 4 and the screw rod 9 to rotate. Then, the screw sleeve 8 will drive the sliding plate 7 to slide along the slider 21 and the chute 20, so that the gap between the elastic plates 10 changes. At the same time, the prism block 11 will drive the threaded plate 3 to rotate through the prism groove 12. Since the threaded plate 3 and the inner wall of the one-way pipe 2 are movably connected by threads, the threaded plate 3 will slide along the prism block 11. Then, the gap between the threaded plate 3 and the movable plate 5 will change. Then, the gap between the push springs 6 will change. Then, the pressure exerted by the push springs 6 on the movable plate 5 will change, thereby changing both the pressure value required to open the sealing plate 4 and the conveying speed of hydrogen after opening at the same time. Then, pull the control sleeve 13 in the reverse direction, so that the control sleeve 13 drives the bellows 17 provided on both sides to reset. Then, the push spring 6 will push the movable plate 5 to drive the screw rod 9 and the sealing plate 4 to reset. Then, the conveying speed of hydrogen after the device is opened can also be changed separately. First, rotate the control sleeve 13. The control sleeve 13 drives the adjusting rod 15 to rotate through the connecting frame 14. Then, the adjusting rod 15 drives the hexagonal rod 40 to rotate through the hexagonal groove 16 opened at one end. Then, the hexagonal rod 40 will drive the sealing plate 4 to rotate. Then, the sealing plate 4 will drive the screw rod 9 to rotate. Since the screw sleeve 8 is movably connected to the screw rod 9 by threads, and the slider 21 and the chute 20 limit the sliding plate 7, the sliding plate 7 will drive the slider 21 to slide along the chute 20, so that the distance between the sliding plate 7 and the sealing plate 4 changes. Then, the gap between the elastic plates 10 will change, so that the cross-sectional area at the corresponding position in the one-way pipe 2 generates a cover plate, and further changes the passing speed of hydrogen after opening. When the device is in normal use, the pressure value of hydrogen conveyed in the connecting pipe 24 becomes larger, and then the sealing plate 4 will be pushed open. Then, the sealing plate 4 will drive the sealing ring 18 provided on one side to disengage from the sealing groove 19. Then, the sealing plate 4 will drive the screw rod 9 to slide. Then, the screw rod 9 will drive the sliding plate 7 to slide along the slider 21 and the chute 20 through the screw sleeve 8. Then, the screw rod 9 will drive the prism block 11 and the movable plate 5 to slide. Then, the movable plate 5 and the threaded plate 3 will cooperate to squeeze the push spring 6. Then, hydrogen will enter the bellows 17. Then, hydrogen will enter the one-way pipe 2 through the gap between the sealing plate 4 and the one-way pipe 2 and flow through the gap between the elastic plates 10.Thus, it enters the main flow pipe 22. When the conveying pressure value of hydrogen decreases, the push spring 6 pushes the movable plate 5 to reset, so that the movable plate 5 drives the sealing plate 4 to reset through the screw rod 9, and the sealing plate 4 drives the sealing ring 18 to engage with the sealing groove 19, thereby realizing the re-sealing of the one-way pipe 2, and further preventing the backflow of flame and pulverized coal.

[0036] Please refer to Figure 1 and Figure 2 As an implementation manner of the conveying device: The conveying device includes a main flow pipe 22, a shunt pipe 23 and a connecting pipe 24. The main flow pipe 22 is installed in the conveying pipe 1, and the input end of the main flow pipe 22 is connected to the one-way pipe 2. A plurality of shunt pipes 23 are connected to the output end of the main flow pipe 22, and the connecting pipe 24 is connected to the input end of the corresponding bellows 17.

[0037] A feeder 25 is connected to the input end of the conveying pipe 1.

[0038] A feed hopper 26 is provided on one side of the feeder 25, and the output end of the feed hopper 26 is connected to the input end of the feeder 25.

[0039] More specifically, when the device needs to be used, first, hydrogen is conveyed into the one-way pipe 2 and the main flow pipe 22 through the conveying device externally connected to the input end of the connecting pipe 24. Then, the hydrogen is conveyed into each shunt pipe 23 through the main flow pipe 22. Then, hydrogen is injected into the shunt pipe 23 and ignited to burn the hydrogen. Then, the pulverized coal is put into the feed hopper 26. Then, the feeder 25 is opened. Then, the pulverized coal is conveyed into the conveying pipe 1 through the feeder 25. Then, the pulverized coal in the conveying pipe 1 will come into contact with the ignited hydrogen and thus be ignited. This design improves the combustion characteristics, increases the combustion speed, and reduces the phenomenon of flame extension by injecting hydrogen into the combustion center. As a fuel with a high energy density, hydrogen has a fast combustion speed and a low ignition temperature, which can effectively promote the combustion of pulverized coal and thus reduce the problem of furnace coking.

[0040] In summary, when the overall device is in use or operation: When the device needs to be used, the opening mechanism of the protective device and the hydrogen delivery speed can be adjusted according to the usage requirements. First, push the control sleeve 13 to one side. Then, the control sleeve 13 will drive the bellows 17 provided on one side to elongate and compress the bellows 17 provided on the other side. Then, the control sleeve 13 will drive the adjusting rod 15 to move through the connecting frame 14. Then, the adjusting rod 15 will push the sealing plate 4 to move. Then, the sealing plate 4 will drive the screw rod 9 and the prism block 11 to move. Then, the screw rod 9 will drive the sliding plate 7 to move through the thread. Then, the movable plate 5 and the threaded plate 3 will cooperate to squeeze the push spring 6. At the same time, the prism block 11 will enter the prism groove 12. Then, rotate the control sleeve 13. Then, the control sleeve 13 will drive the sealing plate 4 and the screw rod 9 to rotate. Then, the screw sleeve 8 will drive the sliding plate 7 to slide along the slider 21 and the chute 20, causing the gap between the elastic plates 10 to change. At the same time, the prism block 11 will drive the threaded plate 3 to rotate through the prism groove 12. Since the threaded plate 3 and the inner wall of the one-way pipe 2 are movably connected by threads, the threaded plate 3 will slide along the prism block 11. Then, the gap between the threaded plate 3 and the movable plate 5 will change. Then, the gap between the push springs 6 will change. Then, the pressure exerted by the push springs 6 on the movable plate 5 will change, thereby simultaneously changing the pressure value required to open the sealing plate 4 and the hydrogen delivery speed after opening. Then, pull the control sleeve 13 in the reverse direction, causing the bellows 17 provided on both sides to reset. Then, the push spring 6 will push the movable plate 5 to drive the screw rod 9 and the sealing plate 4 to reset. Then, the hydrogen delivery speed after the device is opened can also be changed separately. First, rotate the control sleeve 13. The control sleeve 13 drives the adjusting rod 15 to rotate through the connecting frame 14. Then, the adjusting rod 15 drives the hexagonal rod 40 to rotate through the hexagonal groove 16 provided at one end. Then, the hexagonal rod 40 will drive the sealing plate 4 to rotate. Then, the sealing plate 4 will drive the screw rod 9 to rotate. Since the screw sleeve 8 is movably connected to the screw rod 9 by threads, and the slider 21 and the chute 20 limit the sliding plate 7, the sliding plate 7 will drive the slider 21 to slide along the chute 20, causing the distance between the sliding plate 7 and the sealing plate 4 to change. Then, the gap between the elastic plates 10 will change, thereby causing the cross-sectional area at the corresponding position in the one-way pipe 2 to change, and further causing the hydrogen passing speed after opening to change. When the device is in normal use, the hydrogen pressure value conveyed in the connecting pipe 24 becomes larger, and then the sealing plate 4 will be pushed open. Then, the sealing plate 4 will drive the sealing ring 18 provided on one side to disengage from the sealing groove 19. Then, the sealing plate 4 will drive the screw rod 9 to slide. Then, the screw rod 9 will drive the sliding plate 7 to slide along the slider 21 and the chute 20 through the screw sleeve 8. Then, the screw rod 9 will drive the prism block 11 and the movable plate 5 to slide. Then, the movable plate 5 and the threaded plate 3 will cooperate to squeeze the push spring 6. Then, the hydrogen will enter the bellows 17. Then, the hydrogen will enter the one-way pipe 2 through the gap between the sealing plate 4 and the one-way pipe 2 and flow through the gap between the elastic plates 10.Thus, it enters the main flow pipe 22. When the delivery pressure value of hydrogen decreases, the push spring 6 pushes the movable plate 5 to reset, so that the movable plate 5 drives the sealing plate 4 to reset through the screw 9, so that the sealing plate 4 drives the sealing ring 18 to engage in the sealing groove 19, thereby realizing the re-sealing of the one-way pipe 2, thereby preventing the flame and coal powder from flowing back.

[0041] When the device is needed, first, hydrogen is transported to the one-way pipe 2 and the main pipe 22 through the external transport device at the input end of the connecting pipe 24, and then the hydrogen is transported to each branch pipe 23 through the main pipe 22, and then hydrogen is sprayed into the branch pipe 23 and ignited to burn the hydrogen, and then the pulverized coal is put into the feed hopper 26, and then the feeder 25 is opened, and then the pulverized coal is transported to the delivery pipe 1 through the feeder 25, and then the pulverized coal in the delivery pipe 1 will contact with the ignited hydrogen and be ignited. This design improves the combustion characteristics, increases the combustion speed, and reduces the flame delay phenomenon by spraying hydrogen to the combustion center. Hydrogen, as a high-energy-density fuel, has a fast combustion speed and a low ignition temperature, which can effectively promote the combustion of pulverized coal, thereby reducing the problem of coking in the furnace.

[0042] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydrogen pulverized coal composite burner, comprising a conveying pipe (1), characterized in that: A protective device is connected to one side of the conveying pipe (1). The protective device includes a one-way pipe (2), a threaded plate (3), a sealing plate (4), a movable plate (5) and a push spring (6). The threaded plate (3) is connected to the one-way pipe (2) by threads. The sealing plate (4) is arranged inside the one-way pipe (2). The movable plate (5) is arranged on one side of the sealing plate (4). The push spring (6) is connected to one side of the movable plate (5), and the other end of the push spring (6) is movably connected to the threaded plate (3). An adjusting mechanism is arranged inside the one-way pipe (2). The adjusting mechanism includes a sliding plate (7), a screw sleeve (8), a screw rod (9), an elastic plate (10), a hexagonal rod (40), a prism block (11) and a prism groove (12). The sliding plate (7) is arranged inside the one-way pipe (2). The screw sleeve (8) is arranged inside the sliding plate (7). The screw rod (9) is connected to one side of the sealing plate (4). Both ends of the elastic plate (10) are connected to the sliding plate (7) and the inner wall of the one-way pipe (2) respectively. The prism block (11) is connected to one end of the screw rod (9). The prism groove (12) is opened inside the threaded plate (3). The hexagonal rod (40) is connected to one side of the sealing plate (4). One end of the conveying pipe (1) is connected to a conveying device.

2. The hydrogen pulverized coal composite burner according to claim 1, characterized in that: A control sleeve (13) is arranged on one side of the one-way pipe (2). A connecting frame (14) is arranged inside the control sleeve (13). An adjusting rod (15) is arranged on one side of the connecting frame (14). A hexagonal groove (16) is opened at one end of the adjusting rod (15). The hexagonal groove (16) is adapted to the hexagonal rod (40).

3. The hydrogen pulverized coal composite burner according to claim 2, characterized in that: Bellows (17) are symmetrically arranged on both sides of the control sleeve (13). Both ends of the control sleeve (13) are movably connected to the two bellows (17) respectively.

4. The hydrogen pulverized coal composite burner according to claim 1, characterized in that: A sealing ring (18) is arranged on one side of the sealing plate (4). A sealing groove (19) is opened inside the one-way pipe (2). The sealing groove (19) is adapted to the sealing ring (18).

5. The hydrogen pulverized coal composite burner according to claim 4, characterized in that: A sliding groove (20) is opened inside the one-way pipe (2). A sliding block (21) is arranged on the outer side of the sliding plate (7). The sliding block (21) is slidably arranged in the sliding groove (20).

6. A hydrogen pulverized coal composite burner according to any one of claims 1-5, characterized in that: The conveying device includes a main flow pipe (22), a shunt pipe (23) and a connecting pipe (24). The main flow pipe (22) is installed inside the conveying pipe (1), and the input end of the main flow pipe (22) is connected to the one-way pipe (2). A plurality of the shunt pipes (23) are connected to the output end of the main flow pipe (22). The connecting pipe (24) is connected to the input end of the corresponding bellows (17).

7. The hydrogen pulverized coal composite burner according to claim 6, characterized in that: A feeder (25) is connected to the input end of the conveying pipe (1).

8. A hydrogen pulverized coal composite burner according to claim 7, characterized in that: A feed hopper (26) is arranged on one side of the feeder (25). The output end of the feed hopper (26) is connected to the input end of the feeder (25).

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