A pulverized coal combustion system based on hydrogen energy ignition and stable combustion
By adopting a combination of hydrogen energy ignition and an adjustable central combustion chamber in the boiler, the problems of high maintenance costs, poor carbon emissions and stability of the boiler ignition system are solved, and efficient coal pulverized combustion and low NOx emissions are achieved.
Patent Information
- Application Number
- CN202210932556.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-04
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2042-08-04
AI Technical Summary
The existing boiler ignition systems have problems such as huge plasma burners and high maintenance costs, increased carbon emissions and combustion system resistance of oil burners, poor adaptability of coal types, poor combustion stability of low-loads, and large fluctuations in nitrogen oxide emissions.
The coal powder combustion system based on hydrogen energy ignition is adopted, and the hydrogen fuel burner and the central combustion chamber are combined with an adjustable position, and the position of the hydrogen fuel burner and the central combustion chamber are accurately controlled by using the adjustment control structure to achieve ignition and stable combustion.
It reduces combustion time and NOx emissions, improves the adaptability and low-load operation stability of coal pulverized burners, and reduces the energy consumption and carbon emissions of the combustion system.
Smart Images
Figure CN115218186B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of boilers, and in particular to a pulverized coal combustion system based on hydrogen energy ignition and stable combustion. Background Art
[0002] At present, boiler ignition is carried out by oil burners and plasma; the plasma burner system is huge, the start-up and shutdown conditions are high, and the equipment maintenance cost is high; the oil burner increases the carbon emission in the ignition stage, and the ignition of the oil burner will greatly increase the resistance of the combustion system and increase the ignition energy consumption; there is no plasma stable combustion case at present; the stable combustion of the oil burner requires a large amount of fuel and the insufficient combustion has a certain impact on the safe and stable operation of the subsequent equipment; and the plasma device, oil gun and central combustion chamber related to the ignition inside the boiler burner are all fixed positions, with poor adaptability to coal types and unable to play a role in stabilizing combustion; domestic peak-shaving units all have poor low-load combustion stability; the nitrogen oxide (NOx) emissions of the boiler burner fluctuate greatly when running at low load, and the boiler staged combustion system is not effective at the low load stage, etc. Therefore, a coal powder combustion system based on hydrogen energy ignition and stable combustion is proposed to address the above problems. Summary of the invention
[0003] The purpose of the present invention is to provide a coal powder combustion system based on hydrogen energy ignition and stable combustion to solve the problems raised in the above background technology.
[0004] To achieve the above object, the present invention provides the following technical solutions:
[0005] A pulverized coal combustion system based on hydrogen energy ignition and stable combustion comprises a pipeline, a central combustion chamber pull rod, a hydrogen fuel burner, a pulverized coal concentration ring, a central reinforcing concentration ring, a hydrogen fuel burner jacket pipe and a position-adjustable central combustion chamber, wherein a hydrogen fuel burner is slidably mounted on the inner side of the pipeline, a position-adjustable central combustion chamber is mounted on the outer side of one end of the hydrogen fuel burner, a central combustion chamber pull rod is mounted on the outer side of the position-adjustable central combustion chamber, and the other end of the central combustion chamber pull rod passes through the pipeline, a pulverized coal concentration ring is mounted on the inner side of the pipeline, and a central reinforcing concentration ring is mounted on the inner side of the position-adjustable central combustion chamber.
[0006] Preferably, a hydrogen fuel burner jacket tube is installed on the outer side of the hydrogen fuel burner, and the outer side of the hydrogen fuel burner jacket tube is installed on the pipeline.
[0007] Preferably, a limiting ring is installed on the outer side of the position-adjustable central combustion chamber, a ball is embedded on the outer side of the limiting ring, the outer side of the ball is in contact with the pipe, and one end of the central combustion chamber pull rod is installed on the limiting ring.
[0008] Preferably, the number of the limiting rings is 2, and the limiting rings are installed at both ends of the outer side of the position-adjustable central combustion chamber, the number of balls inside the limiting rings is several, and the balls are evenly distributed on the outer side of the limiting rings.
[0009] Preferably, an adjustment control structure is installed on the outer side of the hydrogen fuel burner and the central combustion chamber pull rod.
[0010] Preferably, the adjustment and control structure includes a threaded rod, a threaded sleeve, a worm wheel and a worm, and the number of the threaded rods is 2, one of the threaded rods is installed on one end of the central combustion chamber pull rod, and the other threaded rod is installed on the hydrogen fuel burner through a connecting rod, the other end of the threaded rod is spirally connected to a threaded sleeve, and the other end of the threaded sleeve is installed with a worm wheel, a worm is installed on one side of the worm wheel, a rotating shaft is installed on the inner side of the worm, a fixed plate is installed on the outer side of the rotating shaft, and the other end of the fixed plate is installed on the pipeline, and a rotary valve is installed on the top of the rotating shaft.
[0011] Preferably, a connecting ring is rotatably provided on the outer side of the threaded sleeve, and the top end of the connecting ring is mounted on a fixed plate via a vertical rod.
[0012] Preferably, pointers are installed on the upper side of the connecting rod and the upper side of the central combustion chamber pull rod. The pointer slides with the fixed plate through a slide groove. A scale is provided on the outer side of the pointer, and the scale is fixedly connected to the fixed plate.
[0013] Preferably, the left end of the hydrogen fuel burner is connected to a hydrogen production device or a hydrogen storage unit via a hose or a telescopic tube.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. In the present invention, carbon-free hydrogen fuel is used as the ignition and stable combustion medium, and ignition and stable combustion are achieved by adjusting the position of the hydrogen burner and the central combustion chamber; compared with fuel oil, hydrogen fuel has a fast chemical reaction rate and a high calorific value, which can shorten the combustion time and thus reduce the size of the pulverized coal burner, while accelerating the combustion of pulverized coal in the ignition and stable combustion stages, shortening the pulverized coal combustion time and reducing fuel-type and fast-type NOx emissions; the position-adjustable central combustion chamber can respond to the load requirements of the pulverized coal burner, meet the ignition and stable combustion requirements, and does not affect the full load operation of the pulverized coal burner.
[0016] 2. In the present invention, the adjustment control structure is provided to effectively and accurately control the movement and adjustment of the hydrogen fuel burner and the central combustion chamber pull rod, thereby ensuring better control of ignition and combustion. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0018] Figure 2 This is a schematic diagram of the adjustment control structure of the present invention.
[0019] In the figure: 1. pipeline; 2. center combustion chamber tie rod; 3. hydrogen fuel burner; 4. coal powder concentration ring; 5. center reinforcement concentration ring; 6. hydrogen fuel burner jacket pipe; 7. position-adjustable center combustion chamber; 8. limit ring; 9. adjustment control structure; 10. threaded rod; 11. threaded sleeve; 12. worm gear; 13. worm; 14. connecting rod; 15. connecting ring; 16. fixing plate; 17. rotating shaft; 18. rotary valve; 19. pointer; 20. slide groove; 21. scale. DETAILED DESCRIPTION
[0020] Example 1: Please refer to Figure 1-2 , the present invention provides a technical solution:
[0021] A pulverized coal combustion system based on hydrogen energy ignition and stable combustion comprises a pipeline 1, a central combustion chamber tie rod 2, a hydrogen fuel burner 3, a pulverized coal concentration ring 4, a central reinforcing concentration ring 5, a hydrogen fuel burner sheath tube 6 and a position-adjustable central combustion chamber 7. The hydrogen fuel burner 3 is slidably mounted on the inner side of the pipeline 1, the position-adjustable central combustion chamber 7 is mounted on the outer side of one end of the hydrogen fuel burner 3, the central combustion chamber tie rod 2 is mounted on the outer side of the position-adjustable central combustion chamber 7, and the other end of the central combustion chamber tie rod 2 passes through the pipeline 1, the pulverized coal concentration ring 4 is mounted on the inner side of the pipeline 1, and the central reinforcing concentration ring 5 is mounted on the inner side of the position-adjustable central combustion chamber 7.
[0022] A hydrogen fuel burner jacket tube 6 is installed on the outside of the hydrogen fuel burner 3, and the outside of the hydrogen fuel burner jacket tube 6 is installed on the pipeline 1. This arrangement can effectively protect the hydrogen fuel burner 3. A limit ring 8 is installed on the outside of the adjustable central combustion chamber 7. A ball is embedded on the outside of the limit ring 8. The outside of the ball fits the pipeline 1. One end of the central combustion chamber pull rod 2 is installed on the limit ring 8. The number of limit rings 8 is 2, and the limit rings 8 are installed at both ends of the outer side of the adjustable central combustion chamber 7. The limit rings 8 The number of inner balls is several, and the balls are evenly distributed on the outside of the limit ring 8. This arrangement ensures the stable sliding of the position-adjustable central combustion chamber 7; an adjustment control structure 9 is installed on the outside of the hydrogen fuel burner 3 and the central combustion chamber tie rod 2; the adjustment control structure 9 includes a threaded rod 10, a threaded sleeve 11, a worm gear 12 and a worm 13. The number of threaded rods 10 is 2, one of which is installed at one end of the central combustion chamber tie rod 2, and the other threaded rod 10 is installed on the hydrogen fuel burner through a connecting rod 14. 3, the other end of the threaded rod 10 is spirally connected with a threaded sleeve 11, the other end of the threaded sleeve 11 is installed with a worm wheel 12, one side of the worm wheel 12 is installed with a worm 13, the inner side of the worm 13 is installed with a rotating shaft 17, the outer side of the rotating shaft 17 is installed with a fixing plate 16, and the other end of the fixing plate 16 is installed on the pipeline 1, and the top of the rotating shaft 17 is installed with a rotary valve 18. This arrangement is convenient for stably controlling the sliding of the central combustion chamber tie rod 2 and the hydrogen fuel burner 3; the outer side of the threaded sleeve 11 is rotatably provided with a connecting ring 15, and the connecting ring 18 is installed on the outer side of the threaded sleeve 11. The top end of the connecting ring 15 is installed on the fixed plate 16 through a vertical rod. This arrangement can better limit the connecting ring 15; pointers 19 are installed on the upper side of the connecting rod 14 and the upper side of the central combustion chamber pull rod 2. The pointer 19 slides with the fixed plate 16 through a slide groove 20. A scale 21 is provided on the outside of the pointer 19, and the scale 21 is fixedly connected to the fixed plate 16. This arrangement can accurately control the sliding of the central combustion chamber pull rod 2 and the hydrogen fuel burner 3. The left end of the hydrogen fuel burner 3 is connected to a hydrogen production device through a telescopic tube.
[0023] Working process: in the ignition stage, by rotating the rotary valve 18, the worm 13 is driven to rotate through the rotating shaft 17, and then the worm wheel 12 and the threaded sleeve 11 are driven to rotate, so that the threaded rod 10 drives the hydrogen fuel burner 3 to move to the ignition position, and the setting of the pointer 19 and the scale 21 can ensure that the hydrogen fuel burner 3 moves stably and accurately to the ignition position, and then the rotary valve 18 is rotated, and then the worm 13 is driven to rotate through the rotating shaft 17, and then the worm wheel 12 and the threaded sleeve 11 are driven to rotate, so that the central combustion chamber pull rod 2 and the position-adjustable central combustion chamber 7 are driven to move to the ignition position through the threaded rod 10, and the setting of the pointer 19 and the scale 21 can ensure that the position-adjustable central combustion chamber 7 moves stably and accurately to the ignition position, and then hydrogen fuel is introduced into the hydrogen fuel burner and Ignition, preheat the combustion system, increase the firepower after preheating, slowly increase the coal powder amount to the rated ignition coal powder amount through the pipeline 1, at this time, the coal powder is secondary concentrated by the coal powder concentration ring 4 and the central enhanced concentration ring 5, and then stably ignites in the position-adjustable central combustion chamber 7 under the ignition action of the hydrogen fuel burner 3, and the heat energy released by combustion provides combustion conditions for the coal powder in the area on the right side of the position-adjustable central combustion chamber 7, completing the ignition of the combustion system; in the stable combustion stage, adjust the hydrogen fuel burner 3 to the stable combustion position, and adjust the position-adjustable central combustion chamber 7 to the stable combustion position through the central combustion chamber pull rod 2, and the position is adjusted according to the required combustion load; finally, introduce hydrogen fuel into the hydrogen fuel burner 3, ignite in the area near the outlet of the position-adjustable central combustion chamber 7 and form stable ignition conditions, so as to achieve stable combustion of the combustion system.
[0024] Example 2: Please refer to Figure 1-2 , the present invention provides a technical solution:
[0025] A pulverized coal combustion system based on hydrogen energy ignition and stable combustion comprises a pipeline 1, a central combustion chamber tie rod 2, a hydrogen fuel burner 3, a pulverized coal concentration ring 4, a central reinforcing concentration ring 5, a hydrogen fuel burner sheath tube 6 and a position-adjustable central combustion chamber 7. The hydrogen fuel burner 3 is slidably mounted on the inner side of the pipeline 1, the position-adjustable central combustion chamber 7 is mounted on the outer side of one end of the hydrogen fuel burner 3, the central combustion chamber tie rod 2 is mounted on the outer side of the position-adjustable central combustion chamber 7, and the other end of the central combustion chamber tie rod 2 passes through the pipeline 1, the pulverized coal concentration ring 4 is mounted on the inner side of the pipeline 1, and the central reinforcing concentration ring 5 is mounted on the inner side of the position-adjustable central combustion chamber 7.
[0026] A hydrogen fuel burner jacket tube 6 is installed on the outside of the hydrogen fuel burner 3, and the outside of the hydrogen fuel burner jacket tube 6 is installed on the pipeline 1. This arrangement can effectively protect the hydrogen fuel burner 3. A limit ring 8 is installed on the outside of the adjustable central combustion chamber 7. A ball is embedded on the outside of the limit ring 8. The outside of the ball fits the pipeline 1. One end of the central combustion chamber pull rod 2 is installed on the limit ring 8. The number of limit rings 8 is 2, and the limit rings 8 are installed at both ends of the outer side of the adjustable central combustion chamber 7. The limit rings 8 The number of inner balls is several, and the balls are evenly distributed on the outside of the limit ring 8. This arrangement ensures the stable sliding of the position-adjustable central combustion chamber 7; an adjustment control structure 9 is installed on the outside of the hydrogen fuel burner 3 and the central combustion chamber tie rod 2; the adjustment control structure 9 includes a threaded rod 10, a threaded sleeve 11, a worm gear 12 and a worm 13. The number of threaded rods 10 is 2, one of which is installed at one end of the central combustion chamber tie rod 2, and the other threaded rod 10 is installed on the hydrogen fuel burner through a connecting rod 14. 3, the other end of the threaded rod 10 is spirally connected with a threaded sleeve 11, the other end of the threaded sleeve 11 is installed with a worm wheel 12, one side of the worm wheel 12 is installed with a worm 13, the inner side of the worm 13 is installed with a rotating shaft 17, the outer side of the rotating shaft 17 is installed with a fixing plate 16, and the other end of the fixing plate 16 is installed on the pipeline 1, and the top of the rotating shaft 17 is installed with a rotary valve 18. This arrangement is convenient for stably controlling the sliding of the central combustion chamber tie rod 2 and the hydrogen fuel burner 3; the outer side of the threaded sleeve 11 is rotatably provided with a connecting ring 15, and the connecting ring 18 is installed on the outer side of the threaded sleeve 11. The top end of the connecting ring 15 is installed on the fixed plate 16 through a vertical rod. This arrangement can better limit the connecting ring 15; pointers 19 are installed on the upper side of the connecting rod 14 and the upper side of the central combustion chamber pull rod 2. The pointer 19 slides with the fixed plate 16 through a slide groove 20. A scale 21 is provided on the outside of the pointer 19, and the scale 21 is fixedly connected to the fixed plate 16. This arrangement can accurately control the sliding of the central combustion chamber pull rod 2 and the hydrogen fuel burner 3. The left end of the hydrogen fuel burner 3 is connected to a hydrogen storage unit through a telescopic tube.
[0027] Working process: in the ignition stage, by rotating the rotary valve 18, the worm 13 is driven to rotate through the rotating shaft 17, and then the worm wheel 12 and the threaded sleeve 11 are driven to rotate, so that the threaded rod 10 drives the hydrogen fuel burner 3 to move to the ignition position, and the setting of the pointer 19 and the scale 21 can ensure that the hydrogen fuel burner 3 moves stably and accurately to the ignition position, and then the rotary valve 18 is rotated, and then the worm 13 is driven to rotate through the rotating shaft 17, and then the worm wheel 12 and the threaded sleeve 11 are driven to rotate, so that the central combustion chamber pull rod 2 and the position-adjustable central combustion chamber 7 are driven to move to the ignition position through the threaded rod 10, and the setting of the pointer 19 and the scale 21 can ensure that the position-adjustable central combustion chamber 7 moves stably and accurately to the ignition position, and then hydrogen fuel is introduced into the hydrogen fuel burner and Ignition, preheat the combustion system, increase the firepower after preheating, slowly increase the coal powder amount to the rated ignition coal powder amount through the pipeline 1, at this time, the coal powder is secondary concentrated by the coal powder concentration ring 4 and the central enhanced concentration ring 5, and then stably ignites in the position-adjustable central combustion chamber 7 under the ignition action of the hydrogen fuel burner 3, and the heat energy released by combustion provides combustion conditions for the coal powder in the area on the right side of the position-adjustable central combustion chamber 7, completing the ignition of the combustion system; in the stable combustion stage, adjust the hydrogen fuel burner 3 to the stable combustion position, and adjust the position-adjustable central combustion chamber 7 to the stable combustion position through the central combustion chamber pull rod 2, and the position is adjusted according to the required combustion load; finally, introduce hydrogen fuel into the hydrogen fuel burner 3, ignite in the area near the outlet of the position-adjustable central combustion chamber 7 and form stable ignition conditions, so as to achieve stable combustion of the combustion system.
[0028] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.
Claims
1. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion, comprising a pipeline (1), a central combustion chamber tie rod (2), a hydrogen fuel burner (3), a pulverized coal concentration ring (4), a central reinforced concentration ring (5), a hydrogen fuel burner jacket pipe (6) and a position-adjustable central combustion chamber (7), characterized in that: A hydrogen fuel burner (3) is slidably mounted on the inner side of the pipeline (1); a position-adjustable central combustion chamber (7) is mounted on the outer side of one end of the hydrogen fuel burner (3); a central combustion chamber pull rod (2) is mounted on the outer side of the position-adjustable central combustion chamber (7); and the other end of the central combustion chamber pull rod (2) passes through the pipeline (1); a coal powder concentration ring (4) is mounted on the inner side of the pipeline (1); and a central reinforcement concentration ring (5) is mounted on the inner side of the position-adjustable central combustion chamber (7).
2. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 1, characterized in that: A hydrogen fuel burner jacket tube (6) is installed on the outer side of the hydrogen fuel burner (3), and the outer side of the hydrogen fuel burner jacket tube (6) is installed on the pipeline (1).
3. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 1, characterized in that: A limiting ring (8) is installed on the outer side of the position-adjustable central combustion chamber (7), a ball is embedded on the outer side of the limiting ring (8), the outer side of the ball is in contact with the pipe (1), and one end of the central combustion chamber pull rod (2) is installed on the limiting ring (8).
4. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 3, characterized in that: The number of the limiting rings (8) is two, and the limiting rings (8) are installed at the two ends of the outer side of the position-adjustable central combustion chamber (7). The number of balls inside the limiting rings (8) is several, and the balls are evenly distributed on the outer side of the limiting rings (8).
5. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 1, characterized in that: An adjustment control structure (9) is installed on the outer sides of the hydrogen fuel burner (3) and the central combustion chamber pull rod (2).
6. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 5, characterized in that: The regulating control structure (9) comprises a threaded rod (10), a threaded sleeve (11), a worm wheel (12) and a worm (13). The number of the threaded rods (10) is two, one of which is mounted on one end of the central combustion chamber tie rod (2), and the other threaded rod (10) is mounted on the hydrogen fuel burner (3) through a connecting rod (14). The other end of the threaded rod (10) is spirally connected to the threaded sleeve (11), and the other end of the threaded sleeve (11) is mounted with a worm wheel (12). A worm (13) is mounted on one side of the worm wheel (12), a rotating shaft (17) is mounted on the inner side of the worm (13), a fixing plate (16) is mounted on the outer side of the rotating shaft (17), and the other end of the fixing plate (16) is mounted on the pipeline (1), and a rotary valve (18) is mounted on the top end of the rotating shaft (17).
7. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 6, characterized in that: A connecting ring (15) is rotatably arranged on the outer side of the threaded sleeve (11), and the top end of the connecting ring (15) is mounted on a fixing plate (16) via a vertical rod.
8. A pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 6, characterized in that: A pointer (19) is installed on the upper side of the connecting rod (14) and the upper side of the central combustion chamber pull rod (2). The pointer (19) slides with the fixed plate (16) through a sliding groove (20). A scale (21) is provided on the outer side of the pointer (19), and the scale (21) is fixedly connected to the fixed plate (16).
9. The pulverized coal combustion system based on hydrogen energy ignition and stable combustion according to claim 1 is characterized in that: The left end of the hydrogen fuel burner (3) is connected to a hydrogen production device or a hydrogen storage unit via a hose or a telescopic tube.
Citation Information
Patent Citations
Hydrogen oxygen mixed gas burner
CN101187473A
Oxygen-enriched ignition device with cyclone barrel for flame boiler
CN103912895A