Hydrogenation combustion-supporting system suitable for pulverized coal boiler
By introducing a hydrogen-assisted combustion system into a pulverized coal boiler, utilizing the low ignition temperature and rapid combustion characteristics of hydrogen, and combining it with a multi-stage fast-closing valve and regulating valve design, the problem of combustion instability in pulverized coal boilers under low load is solved, achieving a stable and efficient combustion process and ensuring safety.
Patent Information
- Application Number
- CN202520018002.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Conventional pulverized coal boilers have unstable combustion and low combustion efficiency at low loads, which can easily lead to unburned losses. Uneven combustion can also cause slagging and ash accumulation in the boiler, affecting heat transfer.
Design a hydrogen-assisted combustion system, including a burner body and a hydrogen nozzle. Hydrogen is delivered and mixed with air through a transmission pipeline. Utilizing the low ignition temperature and rapid combustion characteristics of hydrogen, and combined with multiple fast-closing valves and regulating valves, combustion stability and safety are ensured. The burners are symmetrically arranged at the four corners of the furnace to evenly distribute the flame.
It enables stable combustion of pulverized coal boilers under low load, improves combustion efficiency, reduces unburned losses, ensures combustion uniformity and safety, prevents boiler slagging and ash accumulation, and enhances heat transfer.
Smart Images
Figure CN223663348U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of thermal power generation, in particular to a hydrogenation combustion-supporting system suitable for pulverized coal boiler. BACKGROUND
[0002] The conventional pulverized coal boiler is affected by the too large air-coal ratio at low load, thereby affecting the combustion stability, easily leading to incomplete combustion and extinguishing, and being unable to stably combust; the low-volatile coal has a high ignition temperature, leading to delayed ignition and low combustion efficiency, easily generating unburned loss, poor burnout, and high unburned loss of the boiler. Improper design of the burner can lead to unstable flame, local overheating or cold spots, affect the overall combustion efficiency, and incomplete or uneven combustion can lead to slagging and ash deposition in the furnace, affecting the heat transfer effect and the operation of the boiler. SUMMARY
[0003] The utility model discloses a hydrogenation combustion-supporting system suitable for pulverized coal boiler, which solves the technical problems of incomplete combustion and extinguishing and high ignition temperature.
[0004] To solve the above technical problems, the utility model provides a hydrogenation combustion-supporting system suitable for pulverized coal boiler, which comprises a burner body and a hydrogen gas nozzle, one end of the hydrogen gas nozzle is connected with a transmission pipeline, the other end of the transmission pipeline is connected with a first inlet, a first quick closing valve is arranged on the first inlet, an adjusting valve is arranged at the end of the transmission pipeline close to the hydrogen gas nozzle, and a second inlet is arranged on one side of the burner body.
[0005] Further, a second quick closing valve and a third quick closing valve are arranged on the transmission pipeline.
[0006] Further, it further comprises a furnace, the burner bodies are arranged at four corners of the furnace respectively, the burner body comprises a first burner, a second burner, a third burner, and a fourth burner, the first burner, the second burner, the third burner, and the fourth burner are arranged at the four corners of the furnace in sequence, and the axial centers of the four burner bodies are tangent to the center circle in sequence.
[0007] Further, the first inlet is an air inlet, and the first inlet and the transmission pipeline are located on the two sides of the burner body respectively.
[0008] Further, the first inlet and the burner body are connected through a flange.
[0009] Further, the burner body and the furnace are fixedly connected through a screw.
[0010] The hydrogen gas is conveyed to the burner body along the transmission pipeline from the storage device through the first inlet, and the hydrogen gas flow is controlled through the regulating valve to meet the combustion demand under different working conditions; the regulating valve close to the hydrogen gas nozzle can accurately adjust the hydrogen gas flow to ensure the optimal mixing ratio with air; the air enters the burner body through the second inlet, and the first quick closing valve is arranged on the transmission pipeline. These quick closing valves provide safety protection, and can quickly cut off the hydrogen gas supply in an emergency, the hydrogen gas is mixed with air in the burner body to ensure the stability and efficiency of the combustion process, and the characteristics of low ignition temperature and fast combustion rate of hydrogen gas are utilized to realize efficient combustion of coal powder and low-load stable combustion. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a structural schematic view of a hydrogenation combustion-supporting system suitable for a coal powder boiler.
[0012] Wherein: 1, first inlet; 2, transmission pipeline; 3, first quick closing valve; 4, hearth; 9, burner body; 91, first burner; 92, second burner; 93, third burner; 94, fourth burner; 10, second inlet; 11, hydrogen gas nozzle; 116, second quick closing valve; 117, third quick closing valve; 118, regulating valve; 12, center circle. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only one of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0014] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0015] In the following description, the references of "one embodiment", "an embodiment", "one example", "an example", etc. indicate that the embodiments or examples thus described can include specific features, structures, characteristics, properties, elements or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements or limitations. In addition, the repeated use of the phrase "according to one embodiment of the present application" does not necessarily mean the same embodiment, but can mean different embodiments.
[0016] In the present embodiment: as Figure 1As shown, including the burner body 9 and hydrogen nozzle 11, one end of the hydrogen nozzle 11 is connected to the transmission pipeline 2, the other end of the transmission pipeline 2 is connected to the first inlet 1, the first inlet 1 is provided with the first quick closing valve 3, the transmission pipeline 2 is provided with the regulating valve 118 near one end of the hydrogen nozzle 11, the burner body 9 is provided with the second inlet 10 on one side, by integrating the hydrogen nozzle 11 and the first inlet 1 on the burner body 9, the accurate mixing of hydrogen and air can be realized, thereby improving the combustion efficiency, the transmission pipeline 2 ensures the safe transmission of hydrogen from the supply source to the burner body 9, the regulating valve 118 is used to control the hydrogen flow to adapt to different combustion needs; the first quick closing valve 3 provides a quick closing function in emergency situations, improving the safety of the system, hydrogen enters the burner body 9 through the transmission pipeline 2, mixes with air in the burner body 9 under the control of the regulating valve 118, ensuring the stability and efficiency of the combustion process.
[0017] The second quick closing valve 116 and the third quick closing valve 117 are provided on the transmission pipeline 2, the multiple quick closing valve design enhances the safety of the system, providing redundant protection to ensure that the hydrogen supply can be quickly cut off in the event of a failure in any part, preventing the risk of leakage or explosion.
[0018] It also includes a hearth 4, the burner body 9 is arranged at the four corners of the hearth 4 respectively, the burner body 9 includes a first burner 91, a second burner 92, a third burner 93, and a fourth burner 94, the first burner 91, the second burner 92, the third burner 93, and the fourth burner 94 are arranged in sequence at the four corners of the hearth 4, and the axial centers of the four burner bodies 9 are tangent to the center circle 12 in sequence, this arrangement ensures uniform distribution of flames in the hearth 4, improving thermal efficiency and uniformity of combustion, the symmetrical arrangement of the burner bodies 9 makes the temperature distribution in the hearth 4 more uniform, reducing the occurrence of local overheating or cold spots, the arrangement of the burner bodies 9 at the four corners of the hearth 4 forms a symmetrical combustion pattern, with flames converging in the central area to provide uniform heat distribution.
[0019] The first inlet 1 is an air inlet, the first inlet 1 and the transmission pipeline 2 are located on both sides of the burner body 9 respectively, the separation design of air and hydrogen inlets helps to optimize the mixing process of the two, improving combustion efficiency, air enters the burner through the first inlet 1 and mixes with hydrogen entering from the other side to form a mixture suitable for combustion.
[0020] The first inlet 1 is connected to the burner body 9 through a flange, the flange connection provides a reliable and maintainable connection method, ensuring air tightness and structural stability, the flange connection allows quick disassembly and maintenance when needed, while ensuring the sealing between air and the burner body 9 to prevent leakage.
[0021] The burner body 9 is fixedly connected with the furnace 4 by screws, the screws firmly connect the burner body 9 to the furnace 4 through mechanical fixation, and ensure that the burner body 9 does not displace or loosen during operation.
[0022] Workflow: hydrogen is transported from the storage device to the burner body 9 along the transmission pipeline 2 through the first inlet 1, and the hydrogen flow is controlled by the regulating valve 118 to meet the combustion demand under different working conditions;
[0023] The regulating valve 118 near the hydrogen gas nozzle 11 can accurately adjust the flow of hydrogen, ensuring the optimal mixing ratio with air; air enters the burner body 9 through the second inlet 10, and the first speed closing valve 3, the second speed closing valve 116 and the third speed closing valve 117 are arranged on the transmission pipeline 2. These speed closing valves provide multiple safety guarantees, which can quickly cut off the hydrogen supply in emergency situations. The burner body 9 is arranged at the four corners of the furnace 4 to form a symmetrical arrangement. Each burner (first, second, third and fourth burners 94) is tangent to the center circle 12, and this arrangement ensures uniform distribution of the flame in the furnace 4.
[0024] The above description of the disclosed embodiments is that the skilled in the art can implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A hydrogenation combustion-supporting system for a pulverized coal boiler, characterized by: The burner body and the hydrogen gas nozzle are provided, one end of the hydrogen gas nozzle is connected with the transmission pipeline, the other end of the transmission pipeline is connected with the first inlet, the first speed closing valve is arranged on the first inlet, the adjusting valve is arranged on the end of the transmission pipeline close to the hydrogen gas nozzle, and the second inlet is arranged on one side of the burner body.
2. A hydrogenation combustion-supporting system for a pulverized coal boiler according to claim 1, characterized in that: The second speed closing valve and the third speed closing valve are arranged on the transmission pipeline.
3. A hydrogenation combustion-supporting system for a pulverized coal boiler according to claim 1, characterized in that: The furnace is further provided, the burner body is arranged at four corners of the furnace respectively, the burner body comprises the first burner, the second burner, the third burner and the fourth burner, the first burner, the second burner, the third burner and the fourth burner are sequentially arranged at the four corners of the furnace, and the axial centers of the four burner bodies are sequentially tangent to the center circle.
4. A hydrogenation combustion-supporting system for a pulverized coal boiler according to claim 1, characterized in that: The first inlet is the air inlet, and the first inlet and the transmission pipeline are respectively arranged on two sides of the burner body.
5. A hydrogenation combustion-supporting system for a pulverized coal boiler according to claim 1, characterized in that: The first inlet and the burner body are connected through the flange.
6. A hydro- combustion support system for a pulverized coal boiler according to claim 3, characterized in that: The burner body and the furnace are fixedly connected through the screw.